libgpg-error: Extend pkgconfig support to m4 macros

Whilst there is currently .pc file pkgconfig support, it was unused by the
m4 macros. This extends the support so they're used instead of the -config
scripts.

(From OE-Core rev: ff573270f7e87296840911189fd2087a1bc597f7)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/libgpg-error/libgpg-error-1.12/pkgconfig.patch

@@ -5,22 +5,22 @@
 
 Upstream-Status: Pending
 
-Index: libgpg-error-1.8/configure.ac
+Index: libgpg-error-1.12/configure.ac
 ===================================================================
---- libgpg-error-1.8.orig/configure.ac	2010-05-06 06:01:08.000000000 -0700
-+++ libgpg-error-1.8/configure.ac	2010-07-21 02:20:20.923261305 -0700
-@@ -140,6 +140,7 @@
- AC_SUBST(GPG_ERROR_CONFIG_CFLAGS)
- AC_SUBST(GPG_ERROR_CONFIG_ISUBDIRAFTER)
+--- libgpg-error-1.12.orig/configure.ac	2014-05-13 21:14:26.846393236 +0000
++++ libgpg-error-1.12/configure.ac	2014-05-13 21:14:26.926393236 +0000
+@@ -217,6 +217,7 @@
+ AC_CONFIG_FILES([lang/Makefile lang/cl/Makefile lang/cl/gpg-error.asd])
+ AC_CONFIG_FILES([src/versioninfo.rc])
  AC_CONFIG_FILES([src/gpg-error-config], [chmod +x src/gpg-error-config])
 +AC_CONFIG_FILES([src/gpg-error.pc])
  
+ AC_OUTPUT
  
- # Special defines for certain platforms
-Index: libgpg-error-1.8/src/Makefile.am
+Index: libgpg-error-1.12/src/Makefile.am
 ===================================================================
---- libgpg-error-1.8.orig/src/Makefile.am	2010-04-14 02:16:44.000000000 -0700
-+++ libgpg-error-1.8/src/Makefile.am	2010-07-21 02:22:36.655012496 -0700
+--- libgpg-error-1.12.orig/src/Makefile.am	2014-05-13 21:14:26.846393236 +0000
++++ libgpg-error-1.12/src/Makefile.am	2014-05-13 21:14:26.934393236 +0000
 @@ -37,13 +37,15 @@
  bin_SCRIPTS = gpg-error-config
  m4datadir = $(datadir)/aclocal
@@ -38,18 +38,95 @@ Index: libgpg-error-1.8/src/Makefile.am
  
  BUILT_SOURCES = err-sources.h err-codes.h code-to-errno.h code-from-errno.h \
  	err-sources-sym.h err-codes-sym.h errnos-sym.h gpg-error.h \
-Index: libgpg-error-1.8/src/gpg-error.pc.in
+Index: libgpg-error-1.12/src/gpg-error.pc.in
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ libgpg-error-1.8/src/gpg-error.pc.in	2010-07-21 02:20:20.923261305 -0700
-@@ -0,0 +1,10 @@
++++ libgpg-error-1.12/src/gpg-error.pc.in	2014-05-13 21:48:20.266382916 +0000
+@@ -0,0 +1,11 @@
 +prefix=@prefix@
 +exec_prefix=@exec_prefix@
 +libdir=@libdir@
 +includedir=@includedir@
++host=@GPG_ERROR_CONFIG_HOST@
 +
 +Name: gpg-error
 +Description: a library that defines common error values for all GnuPG components
 +Version: @VERSION@
 +Libs: -L{libdir} -lgpg-error
 +Cflags: -I${includedir}
+Index: libgpg-error-1.12/src/gpg-error.m4
+===================================================================
+--- libgpg-error-1.12.orig/src/gpg-error.m4	2014-05-13 21:45:02.038383922 +0000
++++ libgpg-error-1.12/src/gpg-error.m4	2014-05-13 21:47:08.362383281 +0000
+@@ -15,58 +15,14 @@
+ dnl
+ AC_DEFUN([AM_PATH_GPG_ERROR],
+ [ AC_REQUIRE([AC_CANONICAL_HOST])
+-  gpg_error_config_prefix=""
+-  dnl --with-libgpg-error-prefix=PFX is the preferred name for this option,
+-  dnl since that is consistent with how our three siblings use the directory/
+-  dnl package name in --with-$dir_name-prefix=PFX.
+-  AC_ARG_WITH(libgpg-error-prefix,
+-              AC_HELP_STRING([--with-libgpg-error-prefix=PFX],
+-                             [prefix where GPG Error is installed (optional)]),
+-              [gpg_error_config_prefix="$withval"])
+ 
+-  dnl Accept --with-gpg-error-prefix and make it work the same as
+-  dnl --with-libgpg-error-prefix above, for backwards compatibility,
+-  dnl but do not document this old, inconsistently-named option.
+-  AC_ARG_WITH(gpg-error-prefix,,
+-              [gpg_error_config_prefix="$withval"])
++  min_gpg_error_version=ifelse([$1], ,0.0,$1)
+ 
+-  if test x$gpg_error_config_prefix != x ; then
+-     if test x${GPG_ERROR_CONFIG+set} != xset ; then
+-        GPG_ERROR_CONFIG=$gpg_error_config_prefix/bin/gpg-error-config
+-     fi
+-  fi
++  PKG_CHECK_MODULES(GPG_ERROR, [gpg-error >= $min_gpg_error_version], [ok=yes], [ok=no])
+ 
+-  AC_PATH_TOOL(GPG_ERROR_CONFIG, gpg-error-config, no)
+-  min_gpg_error_version=ifelse([$1], ,0.0,$1)
+-  AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version)
+-  ok=no
+-  if test "$GPG_ERROR_CONFIG" != "no" \
+-     && test -f "$GPG_ERROR_CONFIG" ; then
+-    req_major=`echo $min_gpg_error_version | \
+-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+-    req_minor=`echo $min_gpg_error_version | \
+-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+-    gpg_error_config_version=`$GPG_ERROR_CONFIG $gpg_error_config_args --version`
+-    major=`echo $gpg_error_config_version | \
+-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
+-    minor=`echo $gpg_error_config_version | \
+-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
+-    if test "$major" -gt "$req_major"; then
+-        ok=yes
+-    else
+-        if test "$major" -eq "$req_major"; then
+-            if test "$minor" -ge "$req_minor"; then
+-               ok=yes
+-            fi
+-        fi
+-    fi
+-  fi
+   if test $ok = yes; then
+-    GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG $gpg_error_config_args --cflags`
+-    GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG $gpg_error_config_args --libs`
+-    AC_MSG_RESULT([yes ($gpg_error_config_version)])
+     ifelse([$2], , :, [$2])
+-    gpg_error_config_host=`$GPG_ERROR_CONFIG $gpg_error_config_args --host 2>/dev/null || echo none`
++    gpg_error_config_host=`$PKG_CONFIG --variable=host gpg-error`
+     if test x"$gpg_error_config_host" != xnone ; then
+       if test x"$gpg_error_config_host" != x"$host" ; then
+   AC_MSG_WARN([[
+@@ -80,9 +36,6 @@
+       fi
+     fi
+   else
+-    GPG_ERROR_CFLAGS=""
+-    GPG_ERROR_LIBS=""
+-    AC_MSG_RESULT(no)
+     ifelse([$3], , :, [$3])
+   fi
+   AC_SUBST(GPG_ERROR_CFLAGS)