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author | Khem Raj <raj.khem@gmail.com> | 2016-12-18 22:39:55 -0800 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2016-12-19 15:03:43 +0000 |
commit | 83081afc08695ea42046208ca8ab077e482d3018 (patch) | |
tree | 7c79dace5fd9d7e0b8c296d961990cae60f7488d /meta | |
parent | fa7dd6977c1291467f7d209469b9d54371460f62 (diff) | |
download | openembedded-core-83081afc08695ea42046208ca8ab077e482d3018.tar.gz openembedded-core-83081afc08695ea42046208ca8ab077e482d3018.tar.bz2 openembedded-core-83081afc08695ea42046208ca8ab077e482d3018.zip |
autoconf: Fix AC_HEADER_MAJOR with glibc 2.25
Backport the patch from master for 2.69
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Diffstat (limited to 'meta')
-rw-r--r-- | meta/recipes-devtools/autoconf/autoconf/AC_HEADER_MAJOR-port-to-glibc-2.25.patch | 162 | ||||
-rw-r--r-- | meta/recipes-devtools/autoconf/autoconf_2.69.bb | 1 |
2 files changed, 163 insertions, 0 deletions
diff --git a/meta/recipes-devtools/autoconf/autoconf/AC_HEADER_MAJOR-port-to-glibc-2.25.patch b/meta/recipes-devtools/autoconf/autoconf/AC_HEADER_MAJOR-port-to-glibc-2.25.patch new file mode 100644 index 0000000000..fc37236bf8 --- /dev/null +++ b/meta/recipes-devtools/autoconf/autoconf/AC_HEADER_MAJOR-port-to-glibc-2.25.patch @@ -0,0 +1,162 @@ +From e17a30e987d7ee695fb4294a82d987ec3dc9b974 Mon Sep 17 00:00:00 2001 +From: Eric Blake <eblake@redhat.com> +Date: Wed, 14 Sep 2016 08:17:06 -0500 +Subject: [PATCH] AC_HEADER_MAJOR: port to glibc 2.25 + +glibc 2.25 is deprecating the namespace pollution of <sys/types.h> +injecting major(), minor(), and makedev() into the compilation +environment, with a warning that insists that users include +<sys/sysmacros.h> instead. However, because the expansion of +AC_HEADER_MAJOR didn't bother checking sys/sysmacros.h until +after probing whether sys/types.h pollutes the namespace, it was +not defining MAJOR_IN_SYSMACROS, with the result that code +compiled with -Werror chokes on the deprecation warnings because +it was not including sysmacros.h. + +In addition to fixing autoconf (which only benefits projects +that rebuild configure after this fix is released), we can also +give a hint to distros on how they can populate config.site with +a cache variable to force pre-existing configure scripts without +the updated macro to behave sanely in the presence of glibc 2.25 +(the documentation is especially useful since that cache variable +is no longer present in autoconf after this patch). + +Note that mingw lacks major/minor/makedev in any of its standard +headers; for that platform, the behavior of this macro is unchanged +(code using the recommended include formula will get a compile error +when trying to use major(), whether before or after this patch); but +for now, it is assumed that programs actually concerned with +creating devices are not worried about portability to mingw. If +desired, a later patch could tighten AC_HEADER_MAJOR to fail at +configure time if the macros are unavailable in any of the three +system headers, but that semantic change is not worth mixing into +this patch. + +* lib/autoconf/headers.m4 (AC_HEADER_MAJOR): Drop check for +major within sys/types.h; it interferes with the need to check +sysmacros.h first. +* doc/autoconf.texi (Particular Headers) <AC_HEADER_MAJOR>: Expand +details on usage, and on workarounds for non-updated projects. + +Signed-off-by: Eric Blake <eblake@redhat.com> +--- +Upstream-Status: Backport + + doc/autoconf.texi | 35 +++++++++++++++++++++++++++++++---- + lib/autoconf/headers.m4 | 30 ++++++++++++++---------------- + 2 files changed, 45 insertions(+), 20 deletions(-) + +Index: autoconf-2.69/doc/autoconf.texi +=================================================================== +--- autoconf-2.69.orig/doc/autoconf.texi ++++ autoconf-2.69/doc/autoconf.texi +@@ -15,7 +15,7 @@ + @c The ARG is an optional argument. To be used for macro arguments in + @c their documentation (@defmac). + @macro ovar{varname} +-@r{[}@var{\varname\}@r{]}@c ++@r{[}@var{\varname\}@r{]} + @end macro + + @c @dvar(ARG, DEFAULT) +@@ -23,7 +23,7 @@ + @c The ARG is an optional argument, defaulting to DEFAULT. To be used + @c for macro arguments in their documentation (@defmac). + @macro dvar{varname, default} +-@r{[}@var{\varname\} = @samp{\default\}@r{]}@c ++@r{[}@var{\varname\} = @samp{\default\}@r{]} + @end macro + + @c Handling the indexes with Texinfo yields several different problems. +@@ -5926,10 +5926,37 @@ Also see @code{AC_STRUCT_DIRENT_D_INO} a + @cvindex MAJOR_IN_SYSMACROS + @hdrindex{sys/mkdev.h} + @hdrindex{sys/sysmacros.h} +-If @file{sys/types.h} does not define @code{major}, @code{minor}, and +-@code{makedev}, but @file{sys/mkdev.h} does, define +-@code{MAJOR_IN_MKDEV}; otherwise, if @file{sys/sysmacros.h} does, define +-@code{MAJOR_IN_SYSMACROS}. ++Detect the headers required to use @code{makedev}, @code{major}, and ++@code{minor}. These functions may be defined by @file{sys/mkdev.h}, ++@code{sys/sysmacros.h}, or @file{sys/types.h}. ++ ++@code{AC_HEADER_MAJOR} defines @code{MAJOR_IN_MKDEV} if they are in ++@file{sys/mkdev.h}, or @code{MAJOR_IN_SYSMACROS} if they are in ++@file{sys/sysmacros.h}. If neither macro is defined, they are either in ++@file{sys/types.h} or unavailable. ++ ++To properly use these functions, your code should contain something ++like: ++ ++@verbatim ++#include <sys/types.h> ++#ifdef MAJOR_IN_MKDEV ++# include <sys/mkdev.h> ++#elif defined MAJOR_IN_SYSMACROS ++# include <sys/sysmacros.h> ++#endif ++@end verbatim ++ ++Note: Configure scripts built with Autoconf 2.69 or earlier will not ++detect a problem if @file{sys/types.h} contains definitions of ++@code{major}, @code{minor}, and/or @code{makedev} that trigger compiler ++warnings upon use. This is known to occur with GNU libc 2.25, where ++those definitions are being deprecated to reduce namespace pollution. ++If it is not practical to use Autoconf 2.70 to regenerate the configure ++script of affected software, you can work around the problem by setting ++@samp{ac_cv_header_sys_types_h_makedev=no}, as an argument to ++@command{configure} or as part of a @file{config.site} site default file ++(@pxref{Site Defaults}). + @end defmac + + @defmac AC_HEADER_RESOLV +Index: autoconf-2.69/lib/autoconf/headers.m4 +=================================================================== +--- autoconf-2.69.orig/lib/autoconf/headers.m4 ++++ autoconf-2.69/lib/autoconf/headers.m4 +@@ -502,31 +502,29 @@ fi + + # AC_HEADER_MAJOR + # --------------- ++# Thanks to glibc 2.25 deprecating macros in sys/types.h, coupled with ++# back-compat to autoconf 2.69, we need the following logic: ++# Check whether <sys/types.h> compiles. ++# If <sys/mkdev.h> compiles, assume it provides major/minor/makedev. ++# Otherwise, if <sys/sysmacros.h> compiles, assume it provides the macros. ++# Otherwise, either the macros were provided by <sys/types.h>, or do ++# not exist on the platform. Code trying to use these three macros is ++# assumed to not care about platforms that lack the macros. + AN_FUNCTION([major], [AC_HEADER_MAJOR]) + AN_FUNCTION([makedev], [AC_HEADER_MAJOR]) + AN_FUNCTION([minor], [AC_HEADER_MAJOR]) + AN_HEADER([sys/mkdev.h], [AC_HEADER_MAJOR]) + AC_DEFUN([AC_HEADER_MAJOR], +-[AC_CACHE_CHECK(whether sys/types.h defines makedev, +- ac_cv_header_sys_types_h_makedev, +-[AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include <sys/types.h>]], +- [[return makedev(0, 0);]])], +- [ac_cv_header_sys_types_h_makedev=yes], +- [ac_cv_header_sys_types_h_makedev=no]) +-]) +- +-if test $ac_cv_header_sys_types_h_makedev = no; then ++[AC_CHECK_HEADERS_ONCE([sys/types.h]) + AC_CHECK_HEADER(sys/mkdev.h, + [AC_DEFINE(MAJOR_IN_MKDEV, 1, + [Define to 1 if `major', `minor', and `makedev' are + declared in <mkdev.h>.])]) +- +- if test $ac_cv_header_sys_mkdev_h = no; then +- AC_CHECK_HEADER(sys/sysmacros.h, +- [AC_DEFINE(MAJOR_IN_SYSMACROS, 1, +- [Define to 1 if `major', `minor', and `makedev' +- are declared in <sysmacros.h>.])]) +- fi ++if test $ac_cv_header_sys_mkdev_h = no; then ++ AC_CHECK_HEADER(sys/sysmacros.h, ++ [AC_DEFINE(MAJOR_IN_SYSMACROS, 1, ++ [Define to 1 if `major', `minor', and `makedev' ++ are declared in <sysmacros.h>.])]) + fi + ])# AC_HEADER_MAJOR + diff --git a/meta/recipes-devtools/autoconf/autoconf_2.69.bb b/meta/recipes-devtools/autoconf/autoconf_2.69.bb index aa1877a1fb..fd01585441 100644 --- a/meta/recipes-devtools/autoconf/autoconf_2.69.bb +++ b/meta/recipes-devtools/autoconf/autoconf_2.69.bb @@ -14,6 +14,7 @@ SRC_URI += "file://check-automake-cross-warning.patch \ file://autotest-automake-result-format.patch \ file://add_musl_config.patch \ file://performance.patch \ + file://AC_HEADER_MAJOR-port-to-glibc-2.25.patch \ " SRC_URI[md5sum] = "82d05e03b93e45f5a39b828dc9c6c29b" |