--- pkg-config-0.28/configure.ac.orig	2013-04-06 22:23:21 +0400
+++ pkg-config-0.28/configure.ac	2013-04-06 22:48:16 +0400
@@ -24,6 +24,21 @@
 dnl Check for headers
 AC_CHECK_HEADERS([dirent.h unistd.h sys/wait.h malloc.h])
 
+AC_MSG_CHECKING([for Win32])
+case "$host" in
+  *-*-mingw*)
+    native_win32=yes
+    sep=";"
+  ;;
+  *)
+    native_win32=no
+    sep=":"
+  ;;
+esac
+AC_MSG_RESULT([$native_win32])
+AC_SUBST([native_win32])
+AM_CONDITIONAL(NATIVE_WIN32, [test "x$native_win32" = xyes])
+
 dnl A POSIX shell is required for the tests. If TEST_SHELL hasn't been
 dnl set on the command line then we try to find bash or ksh or sh from
 dnl the path. If none of those are available, we just use whatever
@@ -56,6 +71,17 @@
 m4_popdef([var])])
 
 dnl
+dnl Default prefix for hardcoded paths
+dnl
+AC_MSG_CHECKING([for default prefix for default paths])
+AC_ARG_WITH([default_prefix_for_default_paths],
+  [AS_HELP_STRING([--with-default-prefix-for-default-paths],
+    [default prefix for default paths])],
+  [defprefix="$withval"],
+  [defprefix="/usr"])
+AC_MSG_RESULT([$defprefix])
+
+dnl
 dnl Default pkg-config search path
 dnl
 AC_MSG_CHECKING([for default search path for .pc files])
@@ -67,9 +93,9 @@
 # This is slightly wrong, but hopefully causes less confusion than
 # people being unable to find their .pc files in the standard location.
 if test "${prefix}" = "NONE"; then
-	pc_path='${libdir}/pkgconfig:${datadir}/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig'
+	pc_path='${libdir}/pkgconfig${sep}${datadir}/pkgconfig${sep}${defprefix}/lib/pkgconfig${sep}${defprefix}/share/pkgconfig'
 else
-	pc_path='${libdir}/pkgconfig:${datadir}/pkgconfig'
+	pc_path='${libdir}/pkgconfig${sep}${datadir}/pkgconfig'
 fi
 ])
 PKG_EXPAND_VAR([pc_path])
@@ -86,7 +112,7 @@
   [AS_HELP_STRING([--with-system-include-path],
     [avoid -I flags from the given path])],
   [system_include_path="$withval"],
-  [system_include_path="/usr/include"])
+  [system_include_path="${defprefix}/include"])
 PKG_EXPAND_VAR([system_include_path])
 AC_MSG_RESULT([$system_include_path])
 AC_SUBST([system_include_path])
@@ -105,10 +131,10 @@
 pc_lib_sfx=`echo "$libdir" | sed 's:.*/lib::'`
 case "$pc_lib_sfx" in
 */*|"")
-  system_library_path="/usr/lib:/lib"
+  system_library_path="${defprefix}/lib${sep}/lib"
   ;;
 *)
-  system_library_path="/usr/lib$pc_lib_sfx:/lib$pc_lib_sfx:/usr/lib:/lib"
+  system_library_path="${defprefix}/lib${pc_lib_sfx}${sep}/lib${pc_lib_sfx}${sep}${defprefix}/lib${sep}/lib"
   ;;
 esac
 ])
@@ -169,19 +195,6 @@
 fi
 AC_SUBST(WARN_CFLAGS)
 
-AC_MSG_CHECKING([for Win32])
-case "$host" in
-  *-*-mingw*)
-    native_win32=yes
-  ;;
-  *)
-    native_win32=no
-  ;;
-esac
-AC_MSG_RESULT([$native_win32])
-AC_SUBST([native_win32])
-AM_CONDITIONAL(NATIVE_WIN32, [test "x$native_win32" = xyes])
-
 dnl When cross compiling to Windows, Wine might be available to help
 dnl for testing.
 if test "$cross_compiling" = yes && test "$native_win32" = yes; then