--- libusb-0.1.8.orig/libusb.pc.in
+++ libusb-0.1.8/libusb.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libusb
+Description: USB access library
+Version: @VERSION@
+Libs: -L${libdir} -lusb
+Cflags: -I${includedir}
+
--- libusb-0.1.8.orig/configure.in
+++ libusb-0.1.8/configure.in
@@ -219,6 +219,26 @@
     AC_DEFINE_UNQUOTED(HAVE_OLD_DEV_USB_USB_H)])
 fi
 
+#pkg-config: pkg-config is a tool to simplify checks for libraries and versions.
+pkgconfig_msg="no (http://www.freedesktop.org/software/pkgconfig)"
+try_pkgconfig=true
+have_pkgconfig=false
+AC_ARG_WITH(pkgconfig, [  --without-pkgconfig     don't use pkg-config],[
+  if test x$withval = xno; then
+    try_pkgconfig=false
+    pkgconfig_msg="no (not requested)"
+  fi])
+if $try_pkgconfig; then
+  AC_PATH_PROG(PKG_CONFIG,pkg-config)
+  if test -n "${PKG_CONFIG}"; then
+    have_pkgconfig=true
+    pkgconfig_msg="yes"
+  fi
+fi
+# guessing directory to install *.pc into
+pkgconfigdir='${libdir}/pkgconfig'
+AC_SUBST(pkgconfigdir)
+
 # Check if the user wants to enable documentation
 AC_MSG_CHECKING(if we should build the documentation)
 AC_ARG_ENABLE(build-docs, [  --disable-build-docs    turn off building documentation],
@@ -249,6 +269,7 @@
 AC_OUTPUT([
   Makefile
   doc/Makefile
+  libusb.pc
   libusb.spec
   libusb-config
   tests/Makefile
--- libusb-0.1.8.orig/Makefile.am
+++ libusb-0.1.8/Makefile.am
@@ -12,11 +12,13 @@
 
 bin_SCRIPTS = libusb-config
 
-EXTRA_DIST = LICENSE libusb.spec.in libusb.spec libusb-config.in README.in README INSTALL.libusb.in INSTALL.libusb
+EXTRA_DIST = LICENSE libusb.spec.in libusb.spec libusb-config.in README.in README INSTALL.libusb.in INSTALL.libusb libusb.pc.in
 EXTRA_libusb_la_SOURCE = linux.c linux.h bsd.c darwin.c
 
 lib_LTLIBRARIES = libusb.la
 
+pkgconfig_DATA= libusb.pc
+
 if LINUX_API
 OS_SUPPORT = linux.c linux.h
 else