[gobject-introspection] Prefix pkg-config paths with PKG_CONFIG_SYSROOT_DIR environment variable

[Christoph Reiter <creiter src gnome org>]

commit 3d4ed1dbccd3b7cf379fdff263be2af58fd35807
Author: Alexander Kanavin <alex kanavin gmail com>
Date:   Thu Oct 8 18:30:35 2015 +0300

    Prefix pkg-config paths with PKG_CONFIG_SYSROOT_DIR environment variable
    
    This environment variable sets the location of sysroot directory in cross-compilation
    environments; if the variable is not set, the prefix will be empty.
    
    Signed-off-by: Alexander Kanavin <alex kanavin gmail com>

 m4/introspection.m4 | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/m4/introspection.m4 b/m4/introspection.m4
index 0513a4c8..b0ccd689 100644
--- a/m4/introspection.m4
+++ b/m4/introspection.m4
@@ -102,14 +102,14 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
     INTROSPECTION_GIRDIR=
     INTROSPECTION_TYPELIBDIR=
     if test "x$found_introspection" = "xyes"; then
-       INTROSPECTION_SCANNER=`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
-       INTROSPECTION_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
-       INTROSPECTION_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
+       INTROSPECTION_SCANNER=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_scanner 
gobject-introspection-1.0`
+       INTROSPECTION_COMPILER=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_compiler 
gobject-introspection-1.0`
+       INTROSPECTION_GENERATE=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_generate 
gobject-introspection-1.0`
        INTROSPECTION_GIRDIR=`$PKG_CONFIG --define-variable=datadir="${_GI_EXP_DATADIR}" --variable=girdir 
gobject-introspection-1.0`
        INTROSPECTION_TYPELIBDIR="$($PKG_CONFIG --define-variable=libdir="${_GI_EXP_LIBDIR}" 
--variable=typelibdir gobject-introspection-1.0)"
        INTROSPECTION_CFLAGS=`$PKG_CONFIG --cflags gobject-introspection-1.0`
        INTROSPECTION_LIBS=`$PKG_CONFIG --libs gobject-introspection-1.0`
-       INTROSPECTION_MAKEFILE=`$PKG_CONFIG --variable=datadir 
gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
+       INTROSPECTION_MAKEFILE=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=datadir 
gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
     fi
     AC_SUBST(INTROSPECTION_SCANNER)
     AC_SUBST(INTROSPECTION_COMPILER)