path: root/packages/xscreensaver/xscreensaver-4.16/configure.patch

--- xscreensaver-4.16/configure.in	2004-05-11 18:43:13.000000000 -0700
+++ xscreensaver-4.16.new/configure.in	2004-08-06 13:31:20.547673720 -0700
@@ -24,781 +24,11 @@
   fi
 done
 
-###############################################################################
-#
-#       Function to figure out how to run the compiler.
-#
-###############################################################################
-
-AC_DEFUN(AC_PROG_CC_ANSI,
- [AC_PROG_CC
-
-  if test -z "$GCC"; then
-    AC_MSG_CHECKING(how to request ANSI compilation)
-    case "$host" in
-      *-hpux* )
-        AC_MSG_RESULT(HPUX: adding -Ae)
-        CC="$CC -Ae"
-      ;;
-      *-aix* )
-        AC_MSG_RESULT(AIX: adding -qlanglvl=ansi -qhalt=e)
-        CC="$CC -qlanglvl=ansi -qhalt=e"
-      ;;
-
-      *-dec-* )
-        AC_MSG_RESULT(DEC: adding -std1 -ieee)
-        CC="$CC -std1"
-      ;;
-
-      *)
-        AC_MSG_RESULT(no idea)
-      ;;
-    esac
-  fi
-
-  OBJCC="$CC"
-
-  AC_MSG_CHECKING([whether the compiler works on ANSI C])
-  AC_TRY_RUN([ main(int ac, char **av) { return 0; } ],
-     AC_MSG_RESULT(yes),
-     AC_MSG_RESULT(no)
-     AC_MSG_ERROR(Couldn't build even a trivial ANSI C program: check CC.),
-     AC_MSG_ERROR(Couldn't build even a trivial ANSI C program: check CC.))
-
-  if test -n "$GCC"; then
-    AC_MSG_RESULT(Turning on gcc compiler warnings.)
-    CC="$CC -pedantic -Wall -Wstrict-prototypes -Wnested-externs"
-    OBJCC="$OBJCC -Wall"
-    # supposedly gcc 3.4 will have "-Wdeclaration-after-statement"
-    # and then perhaps we can do without -pedantic?
-  else
-    case "$host" in
-      *-irix5* |*-irix6.[0-3]* )
-        AC_MSG_RESULT(Turning on SGI compiler warnings.)
-        CC="$CC -fullwarn -use_readonly_const -rdata_shared -g3"
-      ;;
-#     *-dec-osf* )
-#       if test -z "$GCC"; then
-#         AC_MSG_RESULT(Turning on DEC C compiler warnings.)
-#         CC="$CC -migrate -w0 -verbose -warnprotos"
-#       fi
-#     ;;
-    esac
-  fi
-])
-
-
-###############################################################################
-#
-#       Functions to figure out how to disable // comments in ANSI C code.
-#
-#       (With recent gcc, this is done with "-std=c89".  With older gcc, this
-#       is done by passing "-lang-c89" to cpp, by passing "-Wp,-lang-c89" to
-#       gcc.  Old gcc doesn't support -std, and new gcc doesn't support -lang.
-#       so much for compatibility!)
-#
-#       UPDATE: apparently there is NO WAY to tell gcc 3.2.2 to require that
-#       declarations preceed statements, without resorting to "-pedantic".
-#       This means that there is no way to get gcc3 to issue warnings that
-#       ensure that your code complies with the ANSI/ISO C89 standard, without
-#       also drowning in totally useless warnings.  Thank you master may I
-#       have another.
-#
-#       So, I give up, let's just use -pedantic.
-#
-###############################################################################
-
-AC_DEFUN(AC_GCC_ACCEPTS_STD,
- [if test -n "$GCC"; then
-   AC_CACHE_CHECK([whether gcc accepts -std],
-     ac_cv_gcc_accepts_std,
-    [if ( ( gcc -E -std=c89 - </dev/null >/dev/null ) 2>&1 | \
-          grep unrecognized >/dev/null ); then
-       ac_cv_gcc_accepts_std=no
-     else
-       ac_cv_gcc_accepts_std=yes
-     fi])
-   ac_gcc_accepts_std="$ac_cv_gcc_accepts_std"
-  fi
-])
-
-AC_DEFUN(AC_NO_CPLUSPLUS_COMMENTS_IN_C_CODE,
- [if test -n "$GCC"; then
-   AC_GCC_ACCEPTS_STD
-   AC_MSG_RESULT(Disabling C++ comments in ANSI C code.)
-   #
-   # The reason that // comments are banned from xscreensaver is that gcc is
-   # basically the only compiler in the world that supports them in C code.
-   # All other vendors support them only in their C++ compilers, not in their
-   # ANSI C compilers.  This means that it's a portability problem: every time
-   # these comments have snuck into the xscreensaver source code, I've gotten
-   # complaints about it the next day.  So we turn off support for them in gcc
-   # as well to prevent them from accidentially slipping in.
-   #
-   if test "$ac_gcc_accepts_std" = yes ; then
-     #
-     # -std=c89 defines __STRICT_ANSI__, which we don't want.
-     # (That appears to be the only additional preprocessor symbol
-     # it defines, in addition to the syntax changes it makes.)
-     #
-     # -std=gnu89 is no good, because // comments were a GNU extension
-     # before they were in the ANSI C 99 spec...  (gcc 2.96 permits //
-     # with -std=gnu89 but not with -std=c89.)
-     #
-     CC="$CC -std=c89 -U__STRICT_ANSI__"
-   else
-     # The old way:
-     CC="$CC -Wp,-lang-c89"
-   fi
-  fi
-])
-
-
-###############################################################################
-#
-#       Function to figure out how to turn off Objective C on MacOS X.
-#       (We have to do this to work around an Apple-specific gcc bug.)
-#
-###############################################################################
-
-AC_DEFUN(AC_GCC_ACCEPTS_NO_CPP_PRECOMP,
- [if test -n "$GCC"; then
-   AC_CACHE_CHECK([whether gcc accepts -no-cpp-precomp],
-     ac_cv_gcc_accepts_no_cpp_precomp,
-    [if ( ( gcc -E -no-cpp-precomp - </dev/null >/dev/null ) 2>&1 | \
-          grep unrecognized >/dev/null ); then
-       ac_cv_gcc_accepts_no_cpp_precomp=no
-     else
-       ac_cv_gcc_accepts_no_cpp_precomp=yes
-     fi])
-   ac_gcc_accepts_no_cpp_precomp="$ac_cv_gcc_accepts_no_cpp_precomp"
-  fi
-])
-
-AC_DEFUN(AC_NO_OBJECTIVE_C,
- [if test -n "$GCC"; then
-   AC_GCC_ACCEPTS_NO_CPP_PRECOMP
-   if test "$ac_gcc_accepts_no_cpp_precomp" = yes ; then
-     AC_MSG_RESULT(Disabling Objective C extensions in ANSI C code.)
-     CC="$CC -no-cpp-precomp"
-   fi
-  fi
-])
-
-
-###############################################################################
-#
-#       Function to figure out how to create directory trees.
-#
-###############################################################################
-
-AC_DEFUN(AC_PROG_INSTALL_DIRS,
- [AC_CACHE_CHECK([whether "\${INSTALL} -d" creates intermediate directories],
-    ac_cv_install_d_creates_dirs,
-    [ac_cv_install_d_creates_dirs=no
-     rm -rf conftestdir
-     if mkdir conftestdir; then
-       cd conftestdir 2>/dev/null
-       ${INSTALL} -d `pwd`/dir1/dir2 >/dev/null 2>&1
-       if test -d dir1/dir2/. ; then
-         ac_cv_install_d_creates_dirs=yes
-       fi
-       cd .. 2>/dev/null
-       rm -rf conftestdir
-     fi
-    ])
-
-  if test "$ac_cv_install_d_creates_dirs" = no ; then
-    AC_CACHE_CHECK([whether "mkdir -p" creates intermediate directories],
-      ac_cv_mkdir_p_creates_dirs,
-      [ac_cv_mkdir_p_creates_dirs=no
-       rm -rf conftestdir
-       if mkdir conftestdir; then
-         cd conftestdir 2>/dev/null
-         mkdir -p dir1/dir2 >/dev/null 2>&1
-         if test -d dir1/dir2/. ; then
-           ac_cv_mkdir_p_creates_dirs=yes
-         fi
-         cd .. 2>/dev/null
-         rm -rf conftestdir
-       fi
-      ])
-  fi
-
-  if test "$ac_cv_install_d_creates_dirs" = yes ; then
-    INSTALL_DIRS='${INSTALL} -d'
-  elif test "$ac_cv_mkdir_p_creates_dirs" = yes ; then
-    INSTALL_DIRS='mkdir -p'
-  else
-    # any other ideas?
-    INSTALL_DIRS='${INSTALL} -d'
-  fi
-])
-
-
-###############################################################################
-#
-#       Function to check whether gettimeofday() exists, and how to call it.
-#	This may define HAVE_GETTIMEOFDAY and GETTIMEOFDAY_TWO_ARGS.
-#
-###############################################################################
-
-AC_DEFUN(AC_GETTIMEOFDAY_ARGS,
- [AC_MSG_CHECKING(how to call gettimeofday)
-  AC_CACHE_VAL(ac_cv_gettimeofday_args,
-   [AC_TRY_COMPILE([#include <stdlib.h>
-                    #include <sys/time.h>],
-                   [struct timeval tv; struct timezone tzp;
-                    gettimeofday(&tv, &tzp);],
-                   [ac_gettimeofday_args=2],
-                   [AC_TRY_COMPILE([#include <stdlib.h>
-                                    #include <sys/time.h>],
-                                   [struct timeval tv; gettimeofday(&tv);],
-                                   [ac_gettimeofday_args=1],
-                                   [ac_gettimeofday_args=0])])
-    ac_cv_gettimeofday_args=$ac_gettimeofday_args])
-  ac_gettimeofday_args=$ac_cv_gettimeofday_args
-  if test "$ac_gettimeofday_args" = 1 ; then
-    AC_DEFINE(HAVE_GETTIMEOFDAY)
-    AC_MSG_RESULT(one argument)
-  elif test "$ac_gettimeofday_args" = 2 ; then
-    AC_DEFINE(HAVE_GETTIMEOFDAY)
-    AC_DEFINE(GETTIMEOFDAY_TWO_ARGS)
-    AC_MSG_RESULT(two arguments)
-  else
-    AC_MSG_RESULT(unknown)
-  fi
-])
-
-
-###############################################################################
-#
-#       Function to find perl5 (defines PERL and PERL_VERSION.)
-#
-###############################################################################
-
-# M4 sucks!!  perl sucks too!!
-changequote(X,Y)
-perl_version_cmd='print $]'
-changequote([,])
-
-AC_DEFUN(AC_PROG_PERL,
- [AC_PATH_PROGS(PERL, [perl5 perl],,)
-  if test -z "$PERL" ; then
-    PERL_VERSION=0
-  else
-    AC_CACHE_CHECK([perl version], ac_cv_perl_version,
-                   [ac_cv_perl_version=`$PERL -e "$perl_version_cmd"`])
-    PERL_VERSION=$ac_cv_perl_version
-  fi
- ])
-
-
-###############################################################################
-#
-#       Function to demand "bc".  Losers.
-#
-###############################################################################
-
-AC_DEFUN(AC_DEMAND_BC,
- [ac_bc_result=`echo 6+9 | bc 2>/dev/null`
-  AC_MSG_CHECKING([for bc])
-  if test "$ac_bc_result" = "15" ; then
-    AC_MSG_RESULT(yes)
-  else
-    AC_MSG_RESULT(no)
-    echo ''
-    AC_MSG_ERROR([Your system doesn't have \"bc\", which has been a standard
-                  part of Unix since the 1970s.  Come back when your vendor
-                  has grown a clue.])
-  fi
- ])
-
-###############################################################################
-#
-#       Functions to check how to do ICMP PING requests.
-#
-###############################################################################
-
-AC_DEFUN(AC_CHECK_ICMP,
- [AC_CACHE_CHECK([for struct icmp], ac_cv_have_icmp,
-  [AC_TRY_COMPILE([#include <stdlib.h>
-                   #include <stdio.h>
-                   #include <math.h>
-                   #include <unistd.h>
-                   #include <limits.h>
-                   #include <signal.h>
-                   #include <fcntl.h>
-                   #include <sys/types.h>
-                   #include <sys/time.h>
-                   #include <sys/ipc.h>
-                   #include <sys/shm.h>
-                   #include <sys/socket.h>
-                   #include <netinet/in_systm.h>
-                   #include <netinet/in.h>
-                   #include <netinet/ip.h>
-                   #include <netinet/ip_icmp.h>
-                   #include <netinet/udp.h>
-                   #include <arpa/inet.h>
-                   #include <netdb.h>],
-                  [struct icmp i;
-                   struct sockaddr s;
-                   struct sockaddr_in si;
-                   struct ip ip;
-                   i.icmp_type = ICMP_ECHO;
-                   i.icmp_code = 0;
-                   i.icmp_cksum = 0;
-                   i.icmp_id = 0;
-                   i.icmp_seq = 0;
-                   si.sin_family = AF_INET;
-                   #if defined(__DECC) || defined(_IP_VHL)
-                   ip.ip_vhl = 0;
-                   #else
-                   ip.ip_hl = 0;
-                   #endif
-                   ],
-                  [ac_cv_have_icmp=yes],
-                  [ac_cv_have_icmp=no])])
- if test "$ac_cv_have_icmp" = yes ; then
-   AC_DEFINE(HAVE_ICMP)
- fi])
-
-AC_DEFUN(AC_CHECK_ICMPHDR,
- [AC_CACHE_CHECK([for struct icmphdr], ac_cv_have_icmphdr,
-  [AC_TRY_COMPILE([#include <stdlib.h>
-                   #include <stdio.h>
-                   #include <math.h>
-                   #include <unistd.h>
-                   #include <limits.h>
-                   #include <signal.h>
-                   #include <fcntl.h>
-                   #include <sys/types.h>
-                   #include <sys/time.h>
-                   #include <sys/ipc.h>
-                   #include <sys/shm.h>
-                   #include <sys/socket.h>
-                   #include <netinet/in_systm.h>
-                   #include <netinet/in.h>
-                   #include <netinet/ip.h>
-                   #include <netinet/ip_icmp.h>
-                   #include <netinet/udp.h>
-                   #include <arpa/inet.h>
-                   #include <netdb.h>],
-                  [struct icmphdr i;
-                   struct sockaddr s;
-                   struct sockaddr_in si;
-                   struct ip ip;
-                   i.type = ICMP_ECHO;
-                   i.code = 0;
-                   i.checksum = 0;
-                   i.un.echo.id = 0;
-                   i.un.echo.sequence = 0;
-                   si.sin_family = AF_INET;
-                   ip.ip_hl = 0;],
-                  [ac_cv_have_icmphdr=yes],
-                  [ac_cv_have_icmphdr=no])])
- if test "$ac_cv_have_icmphdr" = yes ; then
-   AC_DEFINE(HAVE_ICMPHDR)
- fi])
-
-
-###############################################################################
-#
-#       Functions to check for various X11 crap.
-#
-###############################################################################
-
-# Try and find the app-defaults directory.
-# It sucks that autoconf doesn't do this already...
-#
-AC_DEFUN(AC_PATH_X_APP_DEFAULTS_XMKMF,[
-  rm -fr conftestdir
-  if mkdir conftestdir; then
-    cd conftestdir 2>/dev/null
-    # Make sure to not put "make" in the Imakefile rules, since we grep it out.
-    cat > Imakefile <<'EOF'
-acfindx:
-	@echo 'ac_x_app_defaults="${XAPPLOADDIR}"'
-EOF
-    if (xmkmf) >/dev/null 2>&1 && test -f Makefile; then
-      # GNU make sometimes prints "make[1]: Entering...", which'd confuse us.
-      eval `${MAKE-make} acfindx 2>/dev/null | grep -v make`
-    fi
-    cd .. 2>/dev/null
-    rm -fr conftestdir
-  fi])
-
-AC_DEFUN(AC_PATH_X_APP_DEFAULTS_DIRECT,[
-  # Look for the directory under a standard set of common directories.
-  # Check X11 before X11Rn because it's often a symlink to the current release.
-  for ac_dir in                                 \
-    /usr/X11/lib/app-defaults                   \
-    /usr/X11R6/lib/app-defaults                 \
-    /usr/X11R6/lib/X11/app-defaults             \
-    /usr/X11R5/lib/app-defaults                 \
-    /usr/X11R5/lib/X11/app-defaults             \
-    /usr/X11R4/lib/app-defaults                 \
-    /usr/X11R4/lib/X11/app-defaults             \
-                                                \
-    /usr/lib/X11/app-defaults                   \
-    /usr/lib/X11R6/app-defaults                 \
-    /usr/lib/X11R5/app-defaults                 \
-    /usr/lib/X11R4/app-defaults                 \
-                                                \
-    /usr/local/X11/lib/app-defaults             \
-    /usr/local/X11R6/lib/app-defaults           \
-    /usr/local/X11R5/lib/app-defaults           \
-    /usr/local/X11R4/lib/app-defaults           \
-                                                \
-    /usr/local/lib/X11/app-defaults             \
-    /usr/local/lib/X11R6/app-defaults           \
-    /usr/local/lib/X11R6/X11/app-defaults       \
-    /usr/local/lib/X11R5/app-defaults           \
-    /usr/local/lib/X11R5/X11/app-defaults       \
-    /usr/local/lib/X11R4/app-defaults           \
-    /usr/local/lib/X11R4/X11/app-defaults       \
-                                                \
-    /usr/X386/lib/X11/app-defaults              \
-    /usr/x386/lib/X11/app-defaults              \
-    /usr/XFree86/lib/X11/app-defaults           \
-                                                \
-    /usr/lib/X11/app-defaults                   \
-    /usr/local/lib/X11/app-defaults             \
-    /usr/unsupported/lib/X11/app-defaults       \
-    /usr/athena/lib/X11/app-defaults            \
-    /usr/local/x11r5/lib/X11/app-defaults       \
-    /usr/lpp/Xamples/lib/X11/app-defaults       \
-    /lib/usr/lib/X11/app-defaults               \
-                                                \
-    /usr/openwin/lib/app-defaults               \
-    /usr/openwin/lib/X11/app-defaults           \
-    /usr/openwin/share/lib/app-defaults         \
-    /usr/openwin/share/lib/X11/app-defaults     \
-                                                \
-    /X11R6/lib/app-defaults                     \
-    /X11R5/lib/app-defaults                     \
-    /X11R4/lib/app-defaults                     \
-    ; \
-  do
-    if test -d "$ac_dir"; then
-      ac_x_app_defaults=$ac_dir
-      break
-    fi
-  done
-])
-
-AC_DEFUN(AC_PATH_X_APP_DEFAULTS,
-  [AC_REQUIRE_CPP()
-    AC_CACHE_CHECK([for X app-defaults directory], ac_cv_x_app_defaults,
-     [AC_PATH_X_APP_DEFAULTS_XMKMF
-      if test x"$ac_x_app_defaults" = x; then
-        AC_PATH_X_APP_DEFAULTS_DIRECT
-      fi
-      if test x"$ac_x_app_defaults" = x; then
-        ac_cv_x_app_defaults="/usr/lib/X11/app-defaults"
-      else
-        # Record where we found app-defaults for the cache.
-        ac_cv_x_app_defaults="$ac_x_app_defaults"
-      fi])
-    eval ac_x_app_defaults="$ac_cv_x_app_defaults"])
-
-
-AC_DEFUN(AC_XPOINTER,
- [AC_CACHE_CHECK([for XPointer], ac_cv_xpointer,
-                 [AC_TRY_X_COMPILE([#include <X11/Xlib.h>],
-                                   [XPointer foo = (XPointer) 0;],
-                                   [ac_cv_xpointer=yes],
-                                   [ac_cv_xpointer=no])])
-  if test "$ac_cv_xpointer" != yes; then
-   AC_DEFINE(XPointer,[char*])
-  fi])
-
-
-# Random special-cases for X on certain pathological OSes.
-# You know who you are.
-#
-AC_DEFUN(AC_X_RANDOM_PATHS,
- [case "$host" in
-    *-hpux*)
-
-      # The following arcana was gleaned from conversations with
-      # Eric Schwartz <erics@col.hp.com>:
-      #
-      # On HPUX 10.x, the parts of X that HP considers "standard" live in
-      # /usr/{include,lib}/X11R6/.  The parts that HP doesn't consider
-      # "standard", notably, Xaw and Xmu, live in /usr/contrib/X11R6/.
-      # Yet /usr/contrib/X11R6/ comes preinstalled on all HPUX systems.
-      # Also, there are symlinks from /usr/include/ and /usr/lib/ into
-      # /usr/{include,lib}/X11R6/, so that (if you don't use Xmu at all)
-      # you don't need any -I or -L arguments.
-      #
-      # On HPUX 9.x, /usr/{include,lib}/X11R5/ and /usr/contrib/X11R5/
-      # are the same division as 10.x.  However, there are no symlinks to
-      # the X stuff from /usr/include/ and /usr/lib/, so -I and -L
-      # arguments are always necessary.
-      #
-      # However, X11R6 was available on HPUX 9.x as a patch: if that
-      # patch was installed, then all of X11R6 went in to
-      # /usr/contrib/X11R6/ (there was no /usr/{include,lib}/X11R6/.)
-      #
-      # HPUX 8.x was the same as 9.x, but was X11R4 instead (I don't know
-      # whether R5 was available as a patch; R6 undoubtedly was not.)
-      #
-      # So.  We try and use the highest numbered pair of
-      # /usr/{include,lib}/X11R?/ and /usr/contrib/X11R?/{include,lib}/
-      # that are available.  We do not mix and match different versions
-      # of X.
-      #
-      # Question I still don't know the answer to: (do you?)
-      #
-      #   * On HPUX 9.x, where /usr/include/X11R5/ was standard, and
-      #     /usr/contrib/X11R6/ could be installed as a patch, what was in
-      #     that contrib directory?  Did it contain so-called "standard"
-      #     X11R6, or did it include Xaw and Xmu as well?  If the former,
-      #     where did one find Xaw and Xmu on 9.x R6 systems?  Would this
-      #     be a situation where one had to reach into the R5 headers and
-      #     libs to find Xmu?  That is, must both R6 and R5 directories
-      #     be on the -I and -L lists in that case?
-      #
-      for version in X11R6 X11R5 X11R4 ; do
-        # if either pair of directories exists...
-        if test -d /usr/include/$version || test -d /usr/contrib/$version/include
-        then
-           # if contrib exists, use it...
-           if test -d /usr/contrib/$version/include ; then
-             X_CFLAGS="$X_CFLAGS -I/usr/contrib/$version/include"
-             X_LIBS="$X_LIBS -L/usr/contrib/$version/lib"
-           fi
-           # if the "standard" one exists, use it.
-           if test -d /usr/include/$version ; then
-             X_CFLAGS="$X_CFLAGS -I/usr/include/$version"
-             X_LIBS="$X_LIBS -L/usr/lib/$version"
-           fi
-           # since at least one of the pair exists, go no farther.
-           break
-        fi
-      done
-
-      # Now find Motif.  Thanks for not making xmkmf find this by
-      # default, you losers.
-      #
-      if test -d /usr/include/Motif2.1 ; then
-        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif2.1"
-        X_LIBS="$X_LIBS -L/usr/lib/Motif2.1"
-      elif test -d /usr/include/Motif1.2 ; then
-        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif1.2"
-        X_LIBS="$X_LIBS -L/usr/lib/Motif1.2"
-      elif test -d /usr/include/Motif1.1 ; then
-        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif1.1"
-        X_LIBS="$X_LIBS -L/usr/lib/Motif1.1"
-      fi
-
-      # Now let's check for the pseudo-standard locations for OpenGL and XPM.
-      #
-      if test -d /opt/graphics/OpenGL/include ; then
-        # HP-UX 10.20 puts it here
-        X_CFLAGS="-I/opt/graphics/OpenGL/include $X_CFLAGS"
-        X_LIBS="-L/opt/graphics/OpenGL/lib $X_LIBS"
-      elif test -d /opt/Mesa/lib ; then
-        X_CFLAGS="-I/opt/Mesa/include $X_CFLAGS"
-        X_LIBS="-L/opt/Mesa/lib $X_LIBS"
-      fi
-
-
-      if test -d /opt/xpm/lib/X11 ; then
-        X_CFLAGS="-I/opt/xpm/include $X_CFLAGS"
-        X_LIBS="-L/opt/xpm/lib/X11 $X_LIBS"
-      fi
-
-      # On HPUX, default to installing in /opt/xscreensaver/ instead of
-      # in /usr/local/, unless there is already an xscreensaver in
-      # /usr/local/bin/.  This can be overridden with the --prefix arg
-      # to configure.  I'm not sure this is the right thing to do, but
-      # Richard Lloyd says so...
-      #
-      if test \! -x /usr/local/bin/xscreensaver ; then
-        ac_default_prefix=/opt/xscreensaver
-      fi
-
-    ;;
-    *-solaris*)
-
-      # Thanks for not making xmkmf find this by default, pinheads.
-      # And thanks for moving things around again, too.  Is this
-      # really the standard location now?  What happened to the
-      # joke that this kind of thing went in /opt?
-      # cthomp says "answer: CDE (Common Disorganized Environment)"
-      #
-      if test -f /usr/dt/include/Xm/Xm.h ; then
-        X_CFLAGS="$X_CFLAGS -I/usr/dt/include"
-        MOTIF_LIBS="$MOTIF_LIBS -L/usr/dt/lib -R/usr/dt/lib"
-
-        # Some versions of Slowlaris Motif require -lgen.  But not all.  Why?
-        AC_CHECK_LIB(gen, regcmp, [MOTIF_LIBS="$MOTIF_LIBS -lgen"])
-      fi
-
-    ;;
-    *-darwin*)
-
-      # On MacOS X (10.x with "fink"), many things are under /sw/.
-      #
-      if test -d /sw/include ; then
-        X_CFLAGS="-I/sw/include $X_CFLAGS"
-        X_LIBS="-L/sw/lib $X_LIBS"
-      fi
-    ;;
-  esac])
-
-
-
-###############################################################################
-#
-#       Some utility functions to make checking for X things easier.
-#
-###############################################################################
-
-# Like AC_CHECK_HEADER, but it uses the already-computed -I directories.
-#
-AC_DEFUN(AC_CHECK_X_HEADER, [
-  ac_save_CPPFLAGS="$CPPFLAGS"
-  if test \! -z "$includedir" ; then 
-    CPPFLAGS="$CPPFLAGS -I$includedir"
-  fi
-  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-  AC_CHECK_HEADER([$1],[$2],[$3],[$4])
-  CPPFLAGS="$ac_save_CPPFLAGS"])
-
-# Like AC_EGREP_HEADER, but it uses the already-computed -I directories.
-#
-AC_DEFUN(AC_EGREP_X_HEADER, [
-  ac_save_CPPFLAGS="$CPPFLAGS"
-  if test \! -z "$includedir" ; then 
-    CPPFLAGS="$CPPFLAGS -I$includedir"
-  fi
-  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-  AC_EGREP_HEADER([$1], [$2], [$3], [$4])
-  CPPFLAGS="$ac_save_CPPFLAGS"])
-
-# Like AC_TRY_COMPILE, but it uses the already-computed -I directories.
-#
-AC_DEFUN(AC_TRY_X_COMPILE, [
-  ac_save_CPPFLAGS="$CPPFLAGS"
-  if test \! -z "$includedir" ; then 
-    CPPFLAGS="$CPPFLAGS -I$includedir"
-  fi
-  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-  AC_TRY_COMPILE([$1], [$2], [$3], [$4])
-  CPPFLAGS="$ac_save_CPPFLAGS"])
-
-
-# Like AC_CHECK_LIB, but it uses the already-computed -I and -L directories.
-# Use this sparingly; it probably doesn't work very well on X programs.
-#
-AC_DEFUN(AC_CHECK_X_LIB, [
-  ac_save_CPPFLAGS="$CPPFLAGS"
-  ac_save_LDFLAGS="$LDFLAGS"
-#  ac_save_LIBS="$LIBS"
-
-  if test \! -z "$includedir" ; then 
-    CPPFLAGS="$CPPFLAGS -I$includedir"
-  fi
-  # note: $X_CFLAGS includes $x_includes
-  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-
-  if test \! -z "$libdir" ; then
-    LDFLAGS="$LDFLAGS -L$libdir"
-  fi
-  # note: $X_LIBS includes $x_libraries
-  LDFLAGS="$LDFLAGS $X_LIBS $X_EXTRA_LIBS"
-
-  AC_CHECK_LIB([$1], [$2], [$3], [$4], [$5])
-  CPPFLAGS="$ac_save_CPPFLAGS"
-  LDFLAGS="$ac_save_LDFLAGS"
-#  LIBS="$ac_save_LIBS"
-  ])
-
-# Like AC_TRY_RUN, but it uses the already-computed -I directories.
-# (But not the -L directories!)
-#
-AC_DEFUN(AC_TRY_X_RUN, [
-  ac_save_CPPFLAGS="$CPPFLAGS"
-  if test \! -z "$includedir" ; then 
-    CPPFLAGS="$CPPFLAGS -I$includedir"
-  fi
-  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-  AC_TRY_RUN([$1], [$2], [$3], [$4])
-  CPPFLAGS="$ac_save_CPPFLAGS"])
-
-
-
-# Usage: HANDLE_X_PATH_ARG([variable_name],
-#                          [--command-line-option],
-#                          [descriptive string])
-#
-# All of the --with options take three forms:
-#
-#   --with-foo (or --with-foo=yes)
-#   --without-foo (or --with-foo=no)
-#   --with-foo=/DIR
-#
-# This function, HANDLE_X_PATH_ARG, deals with the /DIR case.  When it sees
-# a directory (string beginning with a slash) it checks to see whether
-# /DIR/include and /DIR/lib exist, and adds them to $X_CFLAGS and $X_LIBS
-# as appropriate.
-#
-AC_DEFUN(HANDLE_X_PATH_ARG, [
-   case "$[$1]" in
-    yes) ;;
-    no)  ;;
-
-    /*)
-     AC_MSG_CHECKING([for [$3] headers])
-     d=$[$1]/include
-     if test -d $d; then
-       X_CFLAGS="-I$d $X_CFLAGS"
-       AC_MSG_RESULT($d)
-     else
-       AC_MSG_RESULT(not found ($d: no such directory))
-     fi
-
-     AC_MSG_CHECKING([for [$3] libs])
-     d=$[$1]/lib
-     if test -d $d; then
-       X_LIBS="-L$d $X_LIBS"
-       AC_MSG_RESULT($d)
-     else
-       AC_MSG_RESULT(not found ($d: no such directory))
-     fi
-
-     # replace the directory string with "yes".
-     [$1]_req="yes"
-     [$1]=$[$1]_req
-     ;;
-
-    *)
-     echo ""
-     echo "error: argument to [$2] must be \"yes\", \"no\", or a directory."
-     echo "       If it is a directory, then \`DIR/include' will be added to"
-     echo "       the -I list, and \`DIR/lib' will be added to the -L list."
-     exit 1
-     ;;
-   esac
-  ])
-
-
-
-###############################################################################
-###############################################################################
-#
-#       End of function definitions.  Now start actually executing stuff.
-#
-###############################################################################
-###############################################################################
-
 # random compiler setup
 AC_CANONICAL_HOST
-AC_PROG_CC_ANSI
-AC_NO_CPLUSPLUS_COMMENTS_IN_C_CODE
+AC_PROG_CC
+#AC_PROG_CC_ANSI
+#AC_NO_CPLUSPLUS_COMMENTS_IN_C_CODE
 AC_NO_OBJECTIVE_C
 AC_PROG_CPP
 AC_C_CONST
@@ -870,8 +100,8 @@
 
 AC_PROG_INTLTOOL
 GETTEXT_PACKAGE=xscreensaver
-AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE")
-AC_DEFINE_UNQUOTED(PACKAGE, "$GETTEXT_PACKAGE")
+AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",[ This is the name of the gettext package to use. ])
+AC_DEFINE_UNQUOTED(PACKAGE, "$GETTEXT_PACKAGE", [ This is the same as GETTEXT_PACKAGE, but for the glade generated code ])
 AC_SUBST(GETTEXT_PACKAGE)
 
 ALL_LINGUAS="ca da de es et fi fr hu it ja ko nl no pl pt pt_BR ru sk sv vi wa zh_CN zh_TW"
@@ -898,7 +128,7 @@
   XMU_SRCS=''
   XMU_OBJS=''
   XMU_LIBS='-lXmu'
-  AC_DEFINE(HAVE_XMU)
+  AC_DEFINE(HAVE_XMU, 1, [ Define this if you have the Xmu library. ])
 fi
 
 
@@ -1059,7 +289,7 @@
 if test "$with_sgi" = yes; then
   AC_CHECK_X_HEADER(X11/extensions/XScreenSaver.h,
                     [have_sgi=yes
-                     AC_DEFINE(HAVE_SGI_SAVER_EXTENSION)],,
+                     AC_DEFINE(HAVE_SGI_SAVER_EXTENSION, 1, [ Define this if you have the SGI SCREEN_SAVER extension. ])],,
                     [#include <X11/Xlib.h>])
 
 elif test "$with_sgi" != no; then
@@ -1111,7 +341,7 @@
     fi
 
   if test "$have_mit" = yes; then
-    AC_DEFINE(HAVE_MIT_SAVER_EXTENSION)
+    AC_DEFINE(HAVE_MIT_SAVER_EXTENSION, 1, [ Define this if you have the MIT-SCREEN-SAVER extension installed. ])
   fi
 
   fi
@@ -1139,7 +369,7 @@
 if test "$with_xidle" = yes; then
   AC_CHECK_X_HEADER(X11/extensions/xidle.h,
                     [have_xidle=yes
-                     AC_DEFINE(HAVE_XIDLE_EXTENSION)],,
+                     AC_DEFINE(HAVE_XIDLE_EXTENSION, 1, [ Define this if you have the XIDLE extension installed.])],,
                     [#include <X11/Xlib.h>])
 elif test "$with_xidle" != no; then
   echo "error: must be yes or no: --with-xidle-ext=$with_xidle"
@@ -1177,7 +407,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_sgivc" = yes; then
-    AC_DEFINE(HAVE_SGI_VC_EXTENSION)
+    AC_DEFINE(HAVE_SGI_VC_EXTENSION, 1, [ Define this if you have the SGI-VIDEO-CONTROL extension. ])
   fi
 
 elif test "$with_sgivc" != no; then
@@ -1225,7 +455,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_dpms" = yes; then
-    AC_DEFINE(HAVE_DPMS_EXTENSION)
+    AC_DEFINE(HAVE_DPMS_EXTENSION, 1, [ Define this if you have the XDPMS extension. ])
   fi
 
 elif test "$with_dpms" != no; then
@@ -1272,7 +502,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_xinerama" = yes; then
-    AC_DEFINE(HAVE_XINERAMA)
+    AC_DEFINE(HAVE_XINERAMA, 1, [ Define this if you have the Xinerama extension.])
   fi
 
 elif test "$with_xinerama" != no; then
@@ -1312,7 +542,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_xf86vmode" = yes; then
-    AC_DEFINE(HAVE_XF86VMODE)
+    AC_DEFINE(HAVE_XF86VMODE, 1, [ Define this if you have the functions XF86VidModeGetModeLine() and XF86VidModeGetViewPort() ])
   fi
 
 elif test "$with_xf86vmode" != no; then
@@ -1365,11 +595,11 @@
 
   # if those tests succeeded, then we've really got the functions.
   if test "$have_xf86gamma" = yes; then
-    AC_DEFINE(HAVE_XF86VMODE_GAMMA)
+    AC_DEFINE(HAVE_XF86VMODE_GAMMA, 1, [ Define this if you have the functions XF86VidModeGetGamma() and XF86VidModeSetGamma() ])
   fi
 
   if test "$have_xf86gamma_ramp" = yes; then
-    AC_DEFINE(HAVE_XF86VMODE_GAMMA_RAMP)
+    AC_DEFINE(HAVE_XF86VMODE_GAMMA_RAMP, 1, [ Define this if you have the functions XF86VidModeGetGammaRamp() and  XF86VidModeSetGammaRamp() ])
   fi
 
   # pull in the lib, if we haven't already
@@ -1431,7 +661,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_randr" = yes; then
-    AC_DEFINE(HAVE_RANDR)
+    AC_DEFINE(HAVE_RANDR, 1, [ Define this if you have the Resize and Rotate extension ])
   fi
 
 elif test "$with_randr" != no; then
@@ -1454,7 +684,7 @@
                 [true], -lXext -lX11)
   if test "$have_xf86miscsetgrabkeysstate" = yes ; then
     SAVER_LIBS="$SAVER_LIBS -lXxf86misc"
-    AC_DEFINE(HAVE_XF86MISCSETGRABKEYSSTATE)
+    AC_DEFINE(HAVE_XF86MISCSETGRABKEYSSTATE, 1, [ Define this if you have the XF86MiscSetGrabKeysState function ])
   fi
 fi
 
@@ -1467,7 +697,7 @@
 
 AC_MSG_CHECKING([for XHPDisableReset in X11/XHPlib.h])
 AC_EGREP_X_HEADER(XHPDisableReset, X11/XHPlib.h,
-                  [AC_DEFINE(HAVE_XHPDISABLERESET)
+                  [AC_DEFINE(HAVE_XHPDISABLERESET, 1, [ Define this if you have the XHPDisableReset function ])
                    SAVER_LIBS="-lXhp11 $SAVER_LIBS"
                    AC_MSG_RESULT(yes)],
                   [AC_MSG_RESULT(no)])
@@ -1499,7 +729,7 @@
    have_proc_interrupts=$ac_cv_have_proc_interrupts
 
   if test "$have_proc_interrupts" = yes; then
-    AC_DEFINE(HAVE_PROC_INTERRUPTS)
+    AC_DEFINE(HAVE_PROC_INTERRUPTS, 1, [ Define this if you have a Linux-like /proc/interrupts file ])
   fi
 
 elif test "$with_proc_interrupts" != no; then
@@ -1523,7 +753,7 @@
 if test "$enable_locking" = yes; then
   true
 elif test "$enable_locking" = no; then
-  AC_DEFINE(NO_LOCKING)
+  AC_DEFINE(NO_LOCKING, 1, [Define this to remove the option of locking the screen at all. ] )
 else
   echo "error: must be yes or no: --enable-locking=$enable_locking"
   exit 1
@@ -1535,7 +765,7 @@
   if test "$enable_locking" = yes; then
     AC_MSG_RESULT(locking disabled: it doesn't work on MacOS X)
     enable_locking=no
-    AC_DEFINE(NO_LOCKING)
+    AC_DEFINE(NO_LOCKING, 1, [ Define this to remove the option of locking the screen at all. ])
   fi
 fi
 
@@ -1614,7 +844,7 @@
                                    [ac_cv_pam=no])])
   if test "$ac_cv_pam" = yes ; then
     have_pam=yes
-    AC_DEFINE(HAVE_PAM)
+    AC_DEFINE(HAVE_PAM, 1, [ Define this option if you have PAM ])
     PASSWD_LIBS="${PASSWD_LIBS} -lpam"
 
     # libpam typically requires dlopen and dlsym.  On FreeBSD,
@@ -1648,7 +878,7 @@
     if test "$ac_pam_strerror_args" = 1 ; then
       AC_MSG_RESULT(one argument)
     elif test "$ac_pam_strerror_args" = 2 ; then
-      AC_DEFINE(PAM_STRERROR_TWO_ARGS)
+      AC_DEFINE(PAM_STRERROR_TWO_ARGS, 1, [ Define if you have PAM and pam_strerror() requires two arguments. ])
       AC_MSG_RESULT(two arguments)
     else
       AC_MSG_RESULT(unknown)
@@ -1685,7 +915,7 @@
 
   if test "$ac_cv_kerberos" = yes ; then
     have_kerberos=yes
-    AC_DEFINE(HAVE_KERBEROS)
+    AC_DEFINE(HAVE_KERBEROS, 1, [ Define this if you have Kerberos ])
   fi
 
   if test "$ac_cv_kerberos5" = yes ; then
@@ -1705,8 +935,8 @@
                    [have_kerberos=no])
     if test "$have_kerberos" = yes ; then
       have_kerberos5=yes
-      AC_DEFINE(HAVE_KERBEROS)
-      AC_DEFINE(HAVE_KERBEROS5)
+      AC_DEFINE(HAVE_KERBEROS, 1, [ Define this if you have Kerberos ])
+      AC_DEFINE(HAVE_KERBEROS5, 1, [ Define this if you have Kerberos 5 ])
     else
       have_kerberos5=no
       AC_MSG_WARN([Cannot find compat lib (libkrb4) needed to use Kerberos 5])
@@ -1943,13 +1173,13 @@
 
 
 if test "$have_shadow_adjunct" = yes ; then
-  AC_DEFINE(HAVE_ADJUNCT_PASSWD)
+  AC_DEFINE(HAVE_ADJUNCT_PASSWD, 1, [ Define this if your system is Solaris with ``adjunct'' passwords ])
 elif test "$have_shadow_enhanced" = yes ; then
-  AC_DEFINE(HAVE_ENHANCED_PASSWD)
+  AC_DEFINE(HAVE_ENHANCED_PASSWD, 1, [ Define this if your system is Digital or SCO Unix with so-called ``Enhanced Security'' ])
 elif test "$have_shadow_hpux" = yes ; then
-  AC_DEFINE(HAVE_HPUX_PASSWD)
+  AC_DEFINE(HAVE_HPUX_PASSWD, 1, [ Define this if you are running HPUX with so-called ``Secure Passwords'' ])
 elif test "$have_shadow" = yes ; then
-  AC_DEFINE(HAVE_SHADOW_PASSWD)
+  AC_DEFINE(HAVE_SHADOW_PASSWD 1, [ Define this if your system uses `shadow' passwords ])
 fi
 
 
@@ -1983,7 +1213,7 @@
 case "$with_passwd_helper" in
   ""|no) : ;;
   /*)
-    AC_DEFINE_UNQUOTED(PASSWD_HELPER_PROGRAM, "$with_passwd_helper")
+    AC_DEFINE_UNQUOTED(PASSWD_HELPER_PROGRAM, "$with_passwd_helper", [ Define a password helper to use ])
     have_passwd_helper=yes;;
   *)
     echo "error: --with-passwd-helper needs full pathname of helper (not '$with_passwd_helper')." >&2
@@ -2017,7 +1247,7 @@
   have_motif=no
   AC_CHECK_X_HEADER(Xm/Xm.h,
                     [have_motif=yes
-                     AC_DEFINE(HAVE_MOTIF)
+                     AC_DEFINE(HAVE_MOTIF, 1, [ Define this if you have motif ])
                      MOTIF_LIBS="$MOTIF_LIBS -lXm"],,
                     [#include <stdlib.h>
                      #include <stdio.h>
@@ -2026,7 +1256,7 @@
 
 
 if test "$have_motif" = yes; then
-  AC_CHECK_X_HEADER(Xm/ComboBox.h, [AC_DEFINE(HAVE_XMCOMBOBOX)],,
+  AC_CHECK_X_HEADER(Xm/ComboBox.h, [AC_DEFINE(HAVE_XMCOMBOBOX, 1, [ Define this if you have Motif ])],,
                     [#include <stdlib.h>
                      #include <stdio.h>
                      #include <X11/Intrinsic.h>])
@@ -2171,7 +1401,7 @@
 
     if test "$have_gtk" = yes; then
       have_gtk2=yes
-      AC_DEFINE(HAVE_GTK2)
+      AC_DEFINE(HAVE_GTK2, 1, [ Define this if you have GTK2 ])
     else
       if test -n "$ac_gtk_version_string" ; then
         gtk2_halfassed="$ac_gtk_version_string"
@@ -2205,7 +1435,7 @@
         if test "$have_gnome" = no; then
           pkgs="$old_pkgs"
         else
-          AC_DEFINE(HAVE_CRAPPLET)
+          AC_DEFINE(HAVE_CRAPPLET, 1, [ Define this if you have the configuration appliet ])
         fi
       fi
     fi
@@ -2325,7 +1555,7 @@
     if test "$have_gnome" = yes -a "$have_gtk" = yes; then
       ac_gtk_config_cflags=$ac_gnome_config_cflags
       ac_gtk_config_libs=$ac_gnome_config_libs
-      AC_DEFINE(HAVE_CRAPPLET)
+      AC_DEFINE(HAVE_CRAPPLET, 1, [ Define this if you have the configuration applet ])
     fi
 
   fi   # end of {gnome,gtk}-config based tests
@@ -2334,7 +1564,7 @@
     # check for this function that was not in libcapplet 1.2.
     # (only needed in Gnome/Gtk 1.x, not Gnome/Gtk 2.x)
     AC_CHECK_X_LIB(capplet, capplet_widget_changes_are_immediate,
-                   [AC_DEFINE(HAVE_CRAPPLET_IMMEDIATE)], [true],
+                   [AC_DEFINE(HAVE_CRAPPLET_IMMEDIATE, 1, [ Define this if capplet_widget_changes_are_immediate ])], [true],
                    $ac_gnome_config_libs)
   fi
 
@@ -2364,7 +1594,7 @@
   if test "$have_gtk" = yes; then
     INCLUDES="$INCLUDES $ac_gtk_config_cflags"
     GTK_LIBS="$GTK_LIBS $ac_gtk_config_libs"
-    AC_DEFINE(HAVE_GTK)
+    AC_DEFINE(HAVE_GTK, 1, [ Define this if you have GTK ])
 
     if test "$have_gtk2" = yes; then
       GTK_EXTRA_OBJS=""
@@ -2533,7 +1763,7 @@
                    [have_xml=yes
                     xml_halfassed=no
                     XML_LIBS="$ac_xml_config_libs"
-                    AC_DEFINE(HAVE_XML)],
+                    AC_DEFINE(HAVE_XML,1,[ Define this if you have libxml ])],
                    [true],
                    $ac_xml_config_libs)
   fi
@@ -2541,9 +1771,9 @@
   if test "$have_xml" = yes; then
     INCLUDES="$INCLUDES $ac_xml_config_cflags"
     GTK_LIBS="$GTK_LIBS $ac_xml_config_libs"
-    AC_DEFINE(HAVE_XML)
+    AC_DEFINE(HAVE_XML,1,[ Define this if you have libxml ])
     if test "$have_old_xml" = yes; then
-      AC_DEFINE(HAVE_OLD_XML_HEADERS)
+      AC_DEFINE(HAVE_OLD_XML_HEADERS, 1, [ Define this if you have libxml1 ])
     fi
   fi
 
@@ -2773,9 +2003,9 @@
       gl_halfassed=yes
     else
       # linking works -- we can build the GL hacks.
-      AC_DEFINE(HAVE_GL)
+      AC_DEFINE(HAVE_GL, 1, [ Define this if you have OpenGL ])
       if test "$ac_have_mesa_gl" = yes ; then
-        AC_DEFINE(HAVE_MESA_GL)
+        AC_DEFINE(HAVE_MESA_GL, 1, [ Define this if you have Mesa GL ])
       fi
     fi
   fi
@@ -2868,7 +2098,7 @@
 
     # Check for OpenGL 1.1 features.
     #
-    AC_CHECK_X_LIB($gl_lib_1, glBindTexture, [AC_DEFINE(HAVE_GLBINDTEXTURE)],
+    AC_CHECK_X_LIB($gl_lib_1, glBindTexture, [AC_DEFINE(HAVE_GLBINDTEXTURE, 1, [ Define this if you have OpenGL 1.1 ])],
                    [true], $GL_LIBS -lX11 -lXext -lm)
   fi
 
@@ -2951,9 +2181,9 @@
   fi
 
   if test "$have_gle" = yes ; then
-    AC_DEFINE(HAVE_GLE)
+    AC_DEFINE(HAVE_GLE, 1, [ Define this if you have GLE ])
     if test "$have_gle3" = yes ; then
-      AC_DEFINE(HAVE_GLE3)
+      AC_DEFINE(HAVE_GLE3, 1, [ Define this if you have GLE3 ])
     fi
   fi
 
@@ -2983,7 +2213,7 @@
 if test "$with_xpm" = yes; then
   AC_CHECK_X_HEADER(X11/xpm.h,
                    [have_xpm=yes
-                    AC_DEFINE(HAVE_XPM)
+                    AC_DEFINE(HAVE_XPM, 1, [ Define this if you have XPM ])
                     XPM_LIBS="-lXpm"],,
                     [#include <X11/Xlib.h>])
 elif test "$with_xpm" != no; then
@@ -3195,7 +2425,7 @@
   if test "$have_gdk_pixbuf" = yes; then
     INCLUDES="$INCLUDES $ac_gdk_pixbuf_config_cflags"
     XPM_LIBS="$ac_gdk_pixbuf_config_libs"
-    AC_DEFINE(HAVE_GDK_PIXBUF)
+    AC_DEFINE(HAVE_GDK_PIXBUF, 1, [ Define this if you have GDK ])
   else
     have_gdk_pixbuf2=no
   fi
@@ -3236,7 +2466,7 @@
                    [have_jpeg=yes
                     jpeg_halfassed=no
                     JPEG_LIBS="-ljpeg"
-                    AC_DEFINE(HAVE_JPEGLIB)])
+                    AC_DEFINE(HAVE_JPEGLIB, 1, [ Define this if you have libjpeg ])])
   fi
 fi
 
@@ -3251,7 +2481,7 @@
 AC_CHECK_HEADERS(pty.h util.h)
 AC_CHECK_X_LIB(util, forkpty,
                [PTY_LIBS="-lutil"
-                AC_DEFINE(HAVE_FORKPTY)])
+                AC_DEFINE(HAVE_FORKPTY, 1, [ Define this if you have forkpty() ])])
 
 
 ###############################################################################
@@ -3305,7 +2535,7 @@
 
   # if that succeeded, then we've really got it.
   if test "$have_xshm" = yes; then
-    AC_DEFINE(HAVE_XSHM_EXTENSION)
+    AC_DEFINE(HAVE_XSHM_EXTENSION, 1, [ Define this if you have XSHM ])
   fi
 
 elif test "$with_xshm" != no; then
@@ -3333,7 +2563,7 @@
   AC_CHECK_X_HEADER(X11/extensions/Xdbe.h, [have_xdbe=yes],,
                     [#include <X11/Xlib.h>])
   if test "$have_xdbe" = yes; then
-    AC_DEFINE(HAVE_DOUBLE_BUFFER_EXTENSION)    
+    AC_DEFINE(HAVE_DOUBLE_BUFFER_EXTENSION, 1. [ Define this if you have double buffering ])    
   fi
 
 elif test "$with_xdbe" != no; then
@@ -3363,7 +2593,7 @@
 
 if test "$with_readdisplay" = yes; then
   AC_CHECK_X_HEADER(X11/extensions/readdisplay.h,
-                    AC_DEFINE(HAVE_READ_DISPLAY_EXTENSION),,
+                    AC_DEFINE(HAVE_READ_DISPLAY_EXTENSION,1, [ Define this if you have readdisplay.h ]),,
                     [#include <X11/Xlib.h>])
 elif test "$with_readdisplay" != no; then
   echo "error: must be yes or no: --with-readdisplay=$with_readdisplay"
@@ -3462,7 +2692,7 @@
 unset ac_cv_path_fortune_tmp
 unset fortune_tmp
 
-AC_DEFINE_UNQUOTED(FORTUNE_PROGRAM, "$ac_cv_fortune_program")
+AC_DEFINE_UNQUOTED(FORTUNE_PROGRAM, "$ac_cv_fortune_program", [ define your fortune program ])
 
 
 ###############################################################################
--- xscreensaver-4.16/m4/macros.m4	1969-12-31 17:00:00.000000000 -0700
+++ xscreensaver-4.16.new/m4/macros.m4	2004-08-06 13:25:10.605913416 -0700
@@ -0,0 +1,759 @@
+###############################################################################
+#
+#       Function to figure out how to run the compiler.
+#
+###############################################################################
+
+AC_DEFUN(AC_PROG_CC_ANSI,
+ [AC_PROG_CC
+
+  if test -z "$GCC"; then
+    AC_MSG_CHECKING(how to request ANSI compilation)
+    case "$host" in
+      *-hpux* )
+        AC_MSG_RESULT(HPUX: adding -Ae)
+        CC="$CC -Ae"
+      ;;
+      *-aix* )
+        AC_MSG_RESULT(AIX: adding -qlanglvl=ansi -qhalt=e)
+        CC="$CC -qlanglvl=ansi -qhalt=e"
+      ;;
+
+      *-dec-* )
+        AC_MSG_RESULT(DEC: adding -std1 -ieee)
+        CC="$CC -std1"
+      ;;
+
+      *)
+        AC_MSG_RESULT(no idea)
+      ;;
+    esac
+  fi
+
+  OBJCC="$CC"
+
+  AC_MSG_CHECKING([whether the compiler works on ANSI C])
+  AC_TRY_RUN([ main(int ac, char **av) { return 0; } ],
+     AC_MSG_RESULT(yes),
+     AC_MSG_RESULT(no)
+     AC_MSG_ERROR(Couldn't build even a trivial ANSI C program: check CC.),
+     AC_MSG_ERROR(Couldn't build even a trivial ANSI C program: check CC.))
+
+  if test -n "$GCC"; then
+    AC_MSG_RESULT(Turning on gcc compiler warnings.)
+    CC="$CC -pedantic -Wall -Wstrict-prototypes -Wnested-externs"
+    OBJCC="$OBJCC -Wall"
+    # supposedly gcc 3.4 will have "-Wdeclaration-after-statement"
+    # and then perhaps we can do without -pedantic?
+  else
+    case "$host" in
+      *-irix5* |*-irix6.[0-3]* )
+        AC_MSG_RESULT(Turning on SGI compiler warnings.)
+        CC="$CC -fullwarn -use_readonly_const -rdata_shared -g3"
+      ;;
+#     *-dec-osf* )
+#       if test -z "$GCC"; then
+#         AC_MSG_RESULT(Turning on DEC C compiler warnings.)
+#         CC="$CC -migrate -w0 -verbose -warnprotos"
+#       fi
+#     ;;
+    esac
+  fi
+])
+
+###############################################################################
+#
+#       Functions to figure out how to disable // comments in ANSI C code.
+#
+#       (With recent gcc, this is done with "-std=c89".  With older gcc, this
+#       is done by passing "-lang-c89" to cpp, by passing "-Wp,-lang-c89" to
+#       gcc.  Old gcc doesn't support -std, and new gcc doesn't support -lang.
+#       so much for compatibility!)
+#
+#       UPDATE: apparently there is NO WAY to tell gcc 3.2.2 to require that
+#       declarations preceed statements, without resorting to "-pedantic".
+#       This means that there is no way to get gcc3 to issue warnings that
+#       ensure that your code complies with the ANSI/ISO C89 standard, without
+#       also drowning in totally useless warnings.  Thank you master may I
+#       have another.
+#
+#       So, I give up, let's just use -pedantic.
+#
+###############################################################################
+
+AC_DEFUN(AC_GCC_ACCEPTS_STD,
+ [if test -n "$GCC"; then
+   AC_CACHE_CHECK([whether gcc accepts -std],
+     ac_cv_gcc_accepts_std,
+    [if ( ( gcc -E -std=c89 - </dev/null >/dev/null ) 2>&1 | \
+          grep unrecognized >/dev/null ); then
+       ac_cv_gcc_accepts_std=no
+     else
+       ac_cv_gcc_accepts_std=yes
+     fi])
+   ac_gcc_accepts_std="$ac_cv_gcc_accepts_std"
+  fi
+])
+
+AC_DEFUN(AC_NO_CPLUSPLUS_COMMENTS_IN_C_CODE,
+ [if test -n "$GCC"; then
+   AC_GCC_ACCEPTS_STD
+   AC_MSG_RESULT(Disabling C++ comments in ANSI C code.)
+   #
+   # The reason that // comments are banned from xscreensaver is that gcc is
+   # basically the only compiler in the world that supports them in C code.
+   # All other vendors support them only in their C++ compilers, not in their
+   # ANSI C compilers.  This means that it's a portability problem: every time
+   # these comments have snuck into the xscreensaver source code, I've gotten
+   # complaints about it the next day.  So we turn off support for them in gcc
+   # as well to prevent them from accidentially slipping in.
+   #
+   if test "$ac_gcc_accepts_std" = yes ; then
+     #
+     # -std=c89 defines __STRICT_ANSI__, which we don't want.
+     # (That appears to be the only additional preprocessor symbol
+     # it defines, in addition to the syntax changes it makes.)
+     #
+     # -std=gnu89 is no good, because // comments were a GNU extension
+     # before they were in the ANSI C 99 spec...  (gcc 2.96 permits //
+     # with -std=gnu89 but not with -std=c89.)
+     #
+     CC="$CC -std=c89 -U__STRICT_ANSI__"
+   else
+     # The old way:
+     CC="$CC -Wp,-lang-c89"
+   fi
+  fi
+])
+
+
+###############################################################################
+#
+#       Function to figure out how to turn off Objective C on MacOS X.
+#       (We have to do this to work around an Apple-specific gcc bug.)
+#
+###############################################################################
+
+AC_DEFUN(AC_GCC_ACCEPTS_NO_CPP_PRECOMP,
+ [if test -n "$GCC"; then
+   AC_CACHE_CHECK([whether gcc accepts -no-cpp-precomp],
+     ac_cv_gcc_accepts_no_cpp_precomp,
+    [if ( ( gcc -E -no-cpp-precomp - </dev/null >/dev/null ) 2>&1 | \
+          grep unrecognized >/dev/null ); then
+       ac_cv_gcc_accepts_no_cpp_precomp=no
+     else
+       ac_cv_gcc_accepts_no_cpp_precomp=yes
+     fi])
+   ac_gcc_accepts_no_cpp_precomp="$ac_cv_gcc_accepts_no_cpp_precomp"
+  fi
+])
+
+AC_DEFUN(AC_NO_OBJECTIVE_C,
+ [if test -n "$GCC"; then
+   AC_GCC_ACCEPTS_NO_CPP_PRECOMP
+   if test "$ac_gcc_accepts_no_cpp_precomp" = yes ; then
+     AC_MSG_RESULT(Disabling Objective C extensions in ANSI C code.)
+     CC="$CC -no-cpp-precomp"
+   fi
+  fi
+])
+
+
+###############################################################################
+#
+#       Function to figure out how to create directory trees.
+#
+###############################################################################
+
+AC_DEFUN(AC_PROG_INSTALL_DIRS,
+ [AC_CACHE_CHECK([whether "\${INSTALL} -d" creates intermediate directories],
+    ac_cv_install_d_creates_dirs,
+    [ac_cv_install_d_creates_dirs=no
+     rm -rf conftestdir
+     if mkdir conftestdir; then
+       cd conftestdir 2>/dev/null
+       ${INSTALL} -d `pwd`/dir1/dir2 >/dev/null 2>&1
+       if test -d dir1/dir2/. ; then
+         ac_cv_install_d_creates_dirs=yes
+       fi
+       cd .. 2>/dev/null
+       rm -rf conftestdir
+     fi
+    ])
+
+  if test "$ac_cv_install_d_creates_dirs" = no ; then
+    AC_CACHE_CHECK([whether "mkdir -p" creates intermediate directories],
+      ac_cv_mkdir_p_creates_dirs,
+      [ac_cv_mkdir_p_creates_dirs=no
+       rm -rf conftestdir
+       if mkdir conftestdir; then
+         cd conftestdir 2>/dev/null
+         mkdir -p dir1/dir2 >/dev/null 2>&1
+         if test -d dir1/dir2/. ; then
+           ac_cv_mkdir_p_creates_dirs=yes
+         fi
+         cd .. 2>/dev/null
+         rm -rf conftestdir
+       fi
+      ])
+  fi
+
+  if test "$ac_cv_install_d_creates_dirs" = yes ; then
+    INSTALL_DIRS='${INSTALL} -d'
+  elif test "$ac_cv_mkdir_p_creates_dirs" = yes ; then
+    INSTALL_DIRS='mkdir -p'
+  else
+    # any other ideas?
+    INSTALL_DIRS='${INSTALL} -d'
+  fi
+])
+
+
+###############################################################################
+#
+#       Function to check whether gettimeofday() exists, and how to call it.
+#	This may define HAVE_GETTIMEOFDAY and GETTIMEOFDAY_TWO_ARGS.
+#
+###############################################################################
+
+AC_DEFUN(AC_GETTIMEOFDAY_ARGS,
+ [AC_MSG_CHECKING(how to call gettimeofday)
+  AC_CACHE_VAL(ac_cv_gettimeofday_args,
+   [AC_TRY_COMPILE([#include <stdlib.h>
+                    #include <sys/time.h>],
+                   [struct timeval tv; struct timezone tzp;
+                    gettimeofday(&tv, &tzp);],
+                   [ac_gettimeofday_args=2],
+                   [AC_TRY_COMPILE([#include <stdlib.h>
+                                    #include <sys/time.h>],
+                                   [struct timeval tv; gettimeofday(&tv);],
+                                   [ac_gettimeofday_args=1],
+                                   [ac_gettimeofday_args=0])])
+    ac_cv_gettimeofday_args=$ac_gettimeofday_args])
+  ac_gettimeofday_args=$ac_cv_gettimeofday_args
+  if test "$ac_gettimeofday_args" = 1 ; then
+    AC_DEFINE(HAVE_GETTIMEOFDAY, 1, [ Define if you have the gettimeofday function.])
+    AC_MSG_RESULT(one argument)
+  elif test "$ac_gettimeofday_args" = 2 ; then
+    AC_DEFINE(HAVE_GETTIMEOFDAY, 1[ Define if you have the gettimeofday function ])
+    AC_DEFINE(GETTIMEOFDAY_TWO_ARGS, 1, [ Define if gettimeofday requires two arguments.])
+    AC_MSG_RESULT(two arguments)
+  else
+    AC_MSG_RESULT(unknown)
+  fi
+])
+
+
+###############################################################################
+#
+#       Function to find perl5 (defines PERL and PERL_VERSION.)
+#
+###############################################################################
+
+# M4 sucks!!  perl sucks too!!
+changequote(X,Y)
+perl_version_cmd='print $]'
+changequote([,])
+
+AC_DEFUN(AC_PROG_PERL,
+ [AC_PATH_PROGS(PERL, [perl5 perl],,)
+  if test -z "$PERL" ; then
+    PERL_VERSION=0
+  else
+    AC_CACHE_CHECK([perl version], ac_cv_perl_version,
+                   [ac_cv_perl_version=`$PERL -e "$perl_version_cmd"`])
+    PERL_VERSION=$ac_cv_perl_version
+  fi
+ ])
+
+
+###############################################################################
+#
+#       Function to demand "bc".  Losers.
+#
+###############################################################################
+
+AC_DEFUN(AC_DEMAND_BC,
+ [ac_bc_result=`echo 6+9 | bc 2>/dev/null`
+  AC_MSG_CHECKING([for bc])
+  if test "$ac_bc_result" = "15" ; then
+    AC_MSG_RESULT(yes)
+  else
+    AC_MSG_RESULT(no)
+    echo ''
+    AC_MSG_ERROR([Your system doesn't have \"bc\", which has been a standard
+                  part of Unix since the 1970s.  Come back when your vendor
+                  has grown a clue.])
+  fi
+ ])
+
+###############################################################################
+#
+#       Functions to check how to do ICMP PING requests.
+#
+###############################################################################
+
+AC_DEFUN(AC_CHECK_ICMP,
+ [AC_CACHE_CHECK([for struct icmp], ac_cv_have_icmp,
+  [AC_TRY_COMPILE([#include <stdlib.h>
+                   #include <stdio.h>
+                   #include <math.h>
+                   #include <unistd.h>
+                   #include <limits.h>
+                   #include <signal.h>
+                   #include <fcntl.h>
+                   #include <sys/types.h>
+                   #include <sys/time.h>
+                   #include <sys/ipc.h>
+                   #include <sys/shm.h>
+                   #include <sys/socket.h>
+                   #include <netinet/in_systm.h>
+                   #include <netinet/in.h>
+                   #include <netinet/ip.h>
+                   #include <netinet/ip_icmp.h>
+                   #include <netinet/udp.h>
+                   #include <arpa/inet.h>
+                   #include <netdb.h>],
+                  [struct icmp i;
+                   struct sockaddr s;
+                   struct sockaddr_in si;
+                   struct ip ip;
+                   i.icmp_type = ICMP_ECHO;
+                   i.icmp_code = 0;
+                   i.icmp_cksum = 0;
+                   i.icmp_id = 0;
+                   i.icmp_seq = 0;
+                   si.sin_family = AF_INET;
+                   #if defined(__DECC) || defined(_IP_VHL)
+                   ip.ip_vhl = 0;
+                   #else
+                   ip.ip_hl = 0;
+                   #endif
+                   ],
+                  [ac_cv_have_icmp=yes],
+                  [ac_cv_have_icmp=no])])
+ if test "$ac_cv_have_icmp" = yes ; then
+   AC_DEFINE(HAVE_ICMP, 1 [ Define this if you do pings with a `struct icmp' and  a `icmp_id' slot. ])
+ fi])
+
+AC_DEFUN(AC_CHECK_ICMPHDR,
+ [AC_CACHE_CHECK([for struct icmphdr], ac_cv_have_icmphdr,
+  [AC_TRY_COMPILE([#include <stdlib.h>
+                   #include <stdio.h>
+                   #include <math.h>
+                   #include <unistd.h>
+                   #include <limits.h>
+                   #include <signal.h>
+                   #include <fcntl.h>
+                   #include <sys/types.h>
+                   #include <sys/time.h>
+                   #include <sys/ipc.h>
+                   #include <sys/shm.h>
+                   #include <sys/socket.h>
+                   #include <netinet/in_systm.h>
+                   #include <netinet/in.h>
+                   #include <netinet/ip.h>
+                   #include <netinet/ip_icmp.h>
+                   #include <netinet/udp.h>
+                   #include <arpa/inet.h>
+                   #include <netdb.h>],
+                  [struct icmphdr i;
+                   struct sockaddr s;
+                   struct sockaddr_in si;
+                   struct ip ip;
+                   i.type = ICMP_ECHO;
+                   i.code = 0;
+                   i.checksum = 0;
+                   i.un.echo.id = 0;
+                   i.un.echo.sequence = 0;
+                   si.sin_family = AF_INET;
+                   ip.ip_hl = 0;],
+                  [ac_cv_have_icmphdr=yes],
+                  [ac_cv_have_icmphdr=no])])
+ if test "$ac_cv_have_icmphdr" = yes ; then
+   AC_DEFINE(HAVE_ICMPHDR, 1, [ Define this if you do pings with a `struct icmphdr' and a `un.echo.id' slot. ])
+ fi])
+
+
+###############################################################################
+#
+#       Functions to check for various X11 crap.
+#
+###############################################################################
+
+# Try and find the app-defaults directory.
+# It sucks that autoconf doesn't do this already...
+#
+AC_DEFUN(AC_PATH_X_APP_DEFAULTS_XMKMF,[
+  rm -fr conftestdir
+  if mkdir conftestdir; then
+    cd conftestdir 2>/dev/null
+    # Make sure to not put "make" in the Imakefile rules, since we grep it out.
+    cat > Imakefile <<'EOF'
+acfindx:
+	@echo 'ac_x_app_defaults="${XAPPLOADDIR}"'
+EOF
+    if (xmkmf) >/dev/null 2>&1 && test -f Makefile; then
+      # GNU make sometimes prints "make[1]: Entering...", which'd confuse us.
+      eval `${MAKE-make} acfindx 2>/dev/null | grep -v make`
+    fi
+    cd .. 2>/dev/null
+    rm -fr conftestdir
+  fi])
+
+AC_DEFUN(AC_PATH_X_APP_DEFAULTS_DIRECT,[
+  # Look for the directory under a standard set of common directories.
+  # Check X11 before X11Rn because it's often a symlink to the current release.
+  for ac_dir in                                 \
+    /usr/X11/lib/app-defaults                   \
+    /usr/X11R6/lib/app-defaults                 \
+    /usr/X11R6/lib/X11/app-defaults             \
+    /usr/X11R5/lib/app-defaults                 \
+    /usr/X11R5/lib/X11/app-defaults             \
+    /usr/X11R4/lib/app-defaults                 \
+    /usr/X11R4/lib/X11/app-defaults             \
+                                                \
+    /usr/lib/X11/app-defaults                   \
+    /usr/lib/X11R6/app-defaults                 \
+    /usr/lib/X11R5/app-defaults                 \
+    /usr/lib/X11R4/app-defaults                 \
+                                                \
+    /usr/local/X11/lib/app-defaults             \
+    /usr/local/X11R6/lib/app-defaults           \
+    /usr/local/X11R5/lib/app-defaults           \
+    /usr/local/X11R4/lib/app-defaults           \
+                                                \
+    /usr/local/lib/X11/app-defaults             \
+    /usr/local/lib/X11R6/app-defaults           \
+    /usr/local/lib/X11R6/X11/app-defaults       \
+    /usr/local/lib/X11R5/app-defaults           \
+    /usr/local/lib/X11R5/X11/app-defaults       \
+    /usr/local/lib/X11R4/app-defaults           \
+    /usr/local/lib/X11R4/X11/app-defaults       \
+                                                \
+    /usr/X386/lib/X11/app-defaults              \
+    /usr/x386/lib/X11/app-defaults              \
+    /usr/XFree86/lib/X11/app-defaults           \
+                                                \
+    /usr/lib/X11/app-defaults                   \
+    /usr/local/lib/X11/app-defaults             \
+    /usr/unsupported/lib/X11/app-defaults       \
+    /usr/athena/lib/X11/app-defaults            \
+    /usr/local/x11r5/lib/X11/app-defaults       \
+    /usr/lpp/Xamples/lib/X11/app-defaults       \
+    /lib/usr/lib/X11/app-defaults               \
+                                                \
+    /usr/openwin/lib/app-defaults               \
+    /usr/openwin/lib/X11/app-defaults           \
+    /usr/openwin/share/lib/app-defaults         \
+    /usr/openwin/share/lib/X11/app-defaults     \
+                                                \
+    /X11R6/lib/app-defaults                     \
+    /X11R5/lib/app-defaults                     \
+    /X11R4/lib/app-defaults                     \
+    ; \
+  do
+    if test -d "$ac_dir"; then
+      ac_x_app_defaults=$ac_dir
+      break
+    fi
+  done
+])
+
+AC_DEFUN(AC_PATH_X_APP_DEFAULTS,
+  [AC_REQUIRE_CPP()
+    AC_CACHE_CHECK([for X app-defaults directory], ac_cv_x_app_defaults,
+     [AC_PATH_X_APP_DEFAULTS_XMKMF
+      if test x"$ac_x_app_defaults" = x; then
+        AC_PATH_X_APP_DEFAULTS_DIRECT
+      fi
+      if test x"$ac_x_app_defaults" = x; then
+        ac_cv_x_app_defaults="/usr/lib/X11/app-defaults"
+      else
+        # Record where we found app-defaults for the cache.
+        ac_cv_x_app_defaults="$ac_x_app_defaults"
+      fi])
+    eval ac_x_app_defaults="$ac_cv_x_app_defaults"])
+
+
+AC_DEFUN(AC_XPOINTER,
+ [AC_CACHE_CHECK([for XPointer], ac_cv_xpointer,
+                 [AC_TRY_X_COMPILE([#include <X11/Xlib.h>],
+                                   [XPointer foo = (XPointer) 0;],
+                                   [ac_cv_xpointer=yes],
+                                   [ac_cv_xpointer=no])])
+  if test "$ac_cv_xpointer" != yes; then
+   AC_DEFINE(XPointer,[char*], [ Define this to char* if you're using X11R4 or earlier. ])
+  fi])
+
+
+# Random special-cases for X on certain pathological OSes.
+# You know who you are.
+#
+AC_DEFUN(AC_X_RANDOM_PATHS,
+ [case "$host" in
+    *-hpux*)
+
+      # The following arcana was gleaned from conversations with
+      # Eric Schwartz <erics@col.hp.com>:
+      #
+      # On HPUX 10.x, the parts of X that HP considers "standard" live in
+      # /usr/{include,lib}/X11R6/.  The parts that HP doesn't consider
+      # "standard", notably, Xaw and Xmu, live in /usr/contrib/X11R6/.
+      # Yet /usr/contrib/X11R6/ comes preinstalled on all HPUX systems.
+      # Also, there are symlinks from /usr/include/ and /usr/lib/ into
+      # /usr/{include,lib}/X11R6/, so that (if you don't use Xmu at all)
+      # you don't need any -I or -L arguments.
+      #
+      # On HPUX 9.x, /usr/{include,lib}/X11R5/ and /usr/contrib/X11R5/
+      # are the same division as 10.x.  However, there are no symlinks to
+      # the X stuff from /usr/include/ and /usr/lib/, so -I and -L
+      # arguments are always necessary.
+      #
+      # However, X11R6 was available on HPUX 9.x as a patch: if that
+      # patch was installed, then all of X11R6 went in to
+      # /usr/contrib/X11R6/ (there was no /usr/{include,lib}/X11R6/.)
+      #
+      # HPUX 8.x was the same as 9.x, but was X11R4 instead (I don't know
+      # whether R5 was available as a patch; R6 undoubtedly was not.)
+      #
+      # So.  We try and use the highest numbered pair of
+      # /usr/{include,lib}/X11R?/ and /usr/contrib/X11R?/{include,lib}/
+      # that are available.  We do not mix and match different versions
+      # of X.
+      #
+      # Question I still don't know the answer to: (do you?)
+      #
+      #   * On HPUX 9.x, where /usr/include/X11R5/ was standard, and
+      #     /usr/contrib/X11R6/ could be installed as a patch, what was in
+      #     that contrib directory?  Did it contain so-called "standard"
+      #     X11R6, or did it include Xaw and Xmu as well?  If the former,
+      #     where did one find Xaw and Xmu on 9.x R6 systems?  Would this
+      #     be a situation where one had to reach into the R5 headers and
+      #     libs to find Xmu?  That is, must both R6 and R5 directories
+      #     be on the -I and -L lists in that case?
+      #
+      for version in X11R6 X11R5 X11R4 ; do
+        # if either pair of directories exists...
+        if test -d /usr/include/$version || test -d /usr/contrib/$version/include
+        then
+           # if contrib exists, use it...
+           if test -d /usr/contrib/$version/include ; then
+             X_CFLAGS="$X_CFLAGS -I/usr/contrib/$version/include"
+             X_LIBS="$X_LIBS -L/usr/contrib/$version/lib"
+           fi
+           # if the "standard" one exists, use it.
+           if test -d /usr/include/$version ; then
+             X_CFLAGS="$X_CFLAGS -I/usr/include/$version"
+             X_LIBS="$X_LIBS -L/usr/lib/$version"
+           fi
+           # since at least one of the pair exists, go no farther.
+           break
+        fi
+      done
+
+      # Now find Motif.  Thanks for not making xmkmf find this by
+      # default, you losers.
+      #
+      if test -d /usr/include/Motif2.1 ; then
+        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif2.1"
+        X_LIBS="$X_LIBS -L/usr/lib/Motif2.1"
+      elif test -d /usr/include/Motif1.2 ; then
+        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif1.2"
+        X_LIBS="$X_LIBS -L/usr/lib/Motif1.2"
+      elif test -d /usr/include/Motif1.1 ; then
+        X_CFLAGS="$X_CFLAGS -I/usr/include/Motif1.1"
+        X_LIBS="$X_LIBS -L/usr/lib/Motif1.1"
+      fi
+
+      # Now let's check for the pseudo-standard locations for OpenGL and XPM.
+      #
+      if test -d /opt/graphics/OpenGL/include ; then
+        # HP-UX 10.20 puts it here
+        X_CFLAGS="-I/opt/graphics/OpenGL/include $X_CFLAGS"
+        X_LIBS="-L/opt/graphics/OpenGL/lib $X_LIBS"
+      elif test -d /opt/Mesa/lib ; then
+        X_CFLAGS="-I/opt/Mesa/include $X_CFLAGS"
+        X_LIBS="-L/opt/Mesa/lib $X_LIBS"
+      fi
+
+
+      if test -d /opt/xpm/lib/X11 ; then
+        X_CFLAGS="-I/opt/xpm/include $X_CFLAGS"
+        X_LIBS="-L/opt/xpm/lib/X11 $X_LIBS"
+      fi
+
+      # On HPUX, default to installing in /opt/xscreensaver/ instead of
+      # in /usr/local/, unless there is already an xscreensaver in
+      # /usr/local/bin/.  This can be overridden with the --prefix arg
+      # to configure.  I'm not sure this is the right thing to do, but
+      # Richard Lloyd says so...
+      #
+      if test \! -x /usr/local/bin/xscreensaver ; then
+        ac_default_prefix=/opt/xscreensaver
+      fi
+
+    ;;
+    *-solaris*)
+
+      # Thanks for not making xmkmf find this by default, pinheads.
+      # And thanks for moving things around again, too.  Is this
+      # really the standard location now?  What happened to the
+      # joke that this kind of thing went in /opt?
+      # cthomp says "answer: CDE (Common Disorganized Environment)"
+      #
+      if test -f /usr/dt/include/Xm/Xm.h ; then
+        X_CFLAGS="$X_CFLAGS -I/usr/dt/include"
+        MOTIF_LIBS="$MOTIF_LIBS -L/usr/dt/lib -R/usr/dt/lib"
+
+        # Some versions of Slowlaris Motif require -lgen.  But not all.  Why?
+        AC_CHECK_LIB(gen, regcmp, [MOTIF_LIBS="$MOTIF_LIBS -lgen"])
+      fi
+
+    ;;
+    *-darwin*)
+
+      # On MacOS X (10.x with "fink"), many things are under /sw/.
+      #
+      if test -d /sw/include ; then
+        X_CFLAGS="-I/sw/include $X_CFLAGS"
+        X_LIBS="-L/sw/lib $X_LIBS"
+      fi
+    ;;
+  esac])
+
+
+
+###############################################################################
+#
+#       Some utility functions to make checking for X things easier.
+#
+###############################################################################
+
+# Like AC_CHECK_HEADER, but it uses the already-computed -I directories.
+#
+AC_DEFUN(AC_CHECK_X_HEADER, [
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  if test \! -z "$includedir" ; then 
+    CPPFLAGS="$CPPFLAGS -I$includedir"
+  fi
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+  AC_CHECK_HEADER([$1],[$2],[$3],[$4])
+  CPPFLAGS="$ac_save_CPPFLAGS"])
+
+# Like AC_EGREP_HEADER, but it uses the already-computed -I directories.
+#
+AC_DEFUN(AC_EGREP_X_HEADER, [
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  if test \! -z "$includedir" ; then 
+    CPPFLAGS="$CPPFLAGS -I$includedir"
+  fi
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+  AC_EGREP_HEADER([$1], [$2], [$3], [$4])
+  CPPFLAGS="$ac_save_CPPFLAGS"])
+
+# Like AC_TRY_COMPILE, but it uses the already-computed -I directories.
+#
+AC_DEFUN(AC_TRY_X_COMPILE, [
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  if test \! -z "$includedir" ; then 
+    CPPFLAGS="$CPPFLAGS -I$includedir"
+  fi
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+  AC_TRY_COMPILE([$1], [$2], [$3], [$4])
+  CPPFLAGS="$ac_save_CPPFLAGS"])
+
+
+# Like AC_CHECK_LIB, but it uses the already-computed -I and -L directories.
+# Use this sparingly; it probably doesn't work very well on X programs.
+#
+AC_DEFUN(AC_CHECK_X_LIB, [
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  ac_save_LDFLAGS="$LDFLAGS"
+#  ac_save_LIBS="$LIBS"
+
+  if test \! -z "$includedir" ; then 
+    CPPFLAGS="$CPPFLAGS -I$includedir"
+  fi
+  # note: $X_CFLAGS includes $x_includes
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
+  if test \! -z "$libdir" ; then
+    LDFLAGS="$LDFLAGS -L$libdir"
+  fi
+  # note: $X_LIBS includes $x_libraries
+  LDFLAGS="$LDFLAGS $X_LIBS $X_EXTRA_LIBS"
+
+  AC_CHECK_LIB([$1], [$2], [$3], [$4], [$5])
+  CPPFLAGS="$ac_save_CPPFLAGS"
+  LDFLAGS="$ac_save_LDFLAGS"
+#  LIBS="$ac_save_LIBS"
+  ])
+
+# Like AC_TRY_RUN, but it uses the already-computed -I directories.
+# (But not the -L directories!)
+#
+AC_DEFUN(AC_TRY_X_RUN, [
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  if test \! -z "$includedir" ; then 
+    CPPFLAGS="$CPPFLAGS -I$includedir"
+  fi
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+  AC_TRY_RUN([$1], [$2], [$3], [$4])
+  CPPFLAGS="$ac_save_CPPFLAGS"])
+
+
+
+# Usage: HANDLE_X_PATH_ARG([variable_name],
+#                          [--command-line-option],
+#                          [descriptive string])
+#
+# All of the --with options take three forms:
+#
+#   --with-foo (or --with-foo=yes)
+#   --without-foo (or --with-foo=no)
+#   --with-foo=/DIR
+#
+# This function, HANDLE_X_PATH_ARG, deals with the /DIR case.  When it sees
+# a directory (string beginning with a slash) it checks to see whether
+# /DIR/include and /DIR/lib exist, and adds them to $X_CFLAGS and $X_LIBS
+# as appropriate.
+#
+AC_DEFUN(HANDLE_X_PATH_ARG, [
+   case "$[$1]" in
+    yes) ;;
+    no)  ;;
+
+    /*)
+     AC_MSG_CHECKING([for [$3] headers])
+     d=$[$1]/include
+     if test -d $d; then
+       X_CFLAGS="-I$d $X_CFLAGS"
+       AC_MSG_RESULT($d)
+     else
+       AC_MSG_RESULT(not found ($d: no such directory))
+     fi
+
+     AC_MSG_CHECKING([for [$3] libs])
+     d=$[$1]/lib
+     if test -d $d; then
+       X_LIBS="-L$d $X_LIBS"
+       AC_MSG_RESULT($d)
+     else
+       AC_MSG_RESULT(not found ($d: no such directory))
+     fi
+
+     # replace the directory string with "yes".
+     [$1]_req="yes"
+     [$1]=$[$1]_req
+     ;;
+
+    *)
+     echo ""
+     echo "error: argument to [$2] must be \"yes\", \"no\", or a directory."
+     echo "       If it is a directory, then \`DIR/include' will be added to"
+     echo "       the -I list, and \`DIR/lib' will be added to the -L list."
+     exit 1
+     ;;
+   esac
+  ])