[PATCH 2/2] libx11: fix nativesdk build on older distros

[Matthew McClintock <msm@freescale.com>]

makekeys-makekeys.o: In function `main':
makekeys.c:(.text+0x85): undefined reference to `__isoc99_sscanf'
makekeys.c:(.text+0xa7): undefined reference to `__isoc99_sscanf'
collect2: ld returned 1 exit status
make: *** [makekeys] Error 1

Older libc do not have this defined, we can use the -D_GNU_SOURCE
to the compiler to prevent generating calls to this function and
make linking work

Signed-off-by: Matthew McClintock <msm@freescale.com>
---
 .../xorg-lib/libx11/use_host_cc_for_utils.patch    |   12 ++++++++++++
 meta/recipes-graphics/xorg-lib/libx11_1.5.0.bb     |    3 ++-
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-graphics/xorg-lib/libx11/use_host_cc_for_utils.patch

diff --git a/meta/recipes-graphics/xorg-lib/libx11/use_host_cc_for_utils.patch b/meta/recipes-graphics/xorg-lib/libx11/use_host_cc_for_utils.patch
new file mode 100644
index 0000000..08ba39a
--- /dev/null
+++ b/meta/recipes-graphics/xorg-lib/libx11/use_host_cc_for_utils.patch
@@ -0,0 +1,12 @@
+Index: libX11-1.5.0/src/Makefile.am
+===================================================================
+--- libX11-1.5.0.orig/src/Makefile.am
++++ libX11-1.5.0/src/Makefile.am
+@@ -420,6 +420,6 @@ ks_tables.h: $(KEYSYMDEFS) $(top_builddi
+ 	mv ks_tables_h $@
+ 
+ $(top_builddir)/src/util/makekeys$(EXEEXT): force
+-	cd util && $(MAKE)
++	cd util && $(MAKE) CC=gcc CCLD=gcc LDFLAGS= CFLAGS=-D_GNU_SOURCE
+ 
+ force:
diff --git a/meta/recipes-graphics/xorg-lib/libx11_1.5.0.bb b/meta/recipes-graphics/xorg-lib/libx11_1.5.0.bb
index 94e2051..3e00dd8 100644
--- a/meta/recipes-graphics/xorg-lib/libx11_1.5.0.bb
+++ b/meta/recipes-graphics/xorg-lib/libx11_1.5.0.bb
@@ -1,11 +1,12 @@
 require libx11.inc
 inherit gettext
 
-PR = "${INC_PR}.2"
+PR = "${INC_PR}.3"
 
 BBCLASSEXTEND = "native nativesdk"
 
 SRC_URI += "file://keysymdef_include.patch"
+SRC_URI_append_virtclass-nativesdk += "file://use_host_cc_for_utils.patch"
 
 SRC_URI[md5sum] = "78b4b3bab4acbdf0abcfca30a8c70cc6"
 SRC_URI[sha256sum] = "c382efd7e92bfc3cef39a4b7f1ecf2744ba4414a705e3bc1e697f75502bd4d86"
-- 
1.7.9.7