qemu: fix failure to find zlib header files during configure

Corrects problems during configure of qemu-native due to the BUILD_CFLAGS
not being included when attempting to compile the test program for zlib
within the configure script.

Signed-off-by: Paul Eggleton <paul.eggleton@intel.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/recipes-devtools/qemu/qemu-0.12.4/fix-configure-checks.patch

@@ -0,0 +1,20 @@
+In native builds, qemu can fail to find zlib development files in the native 
+sysroot and the build machine might not have zlib-dev packages installed.
+
+Add CFLAGS to qemu's CFLAGS which in the native case means BUILD_CFLAGS are
+added and files in the sysroot can be found.
+
+Patch from Paul Eggleton, Comments by RP 28/11/10
+
+Index: qemu-0.12.4/configure
+===================================================================
+--- qemu-0.12.4.orig/configure
++++ qemu-0.12.4/configure
+@@ -99,6 +99,7 @@ QEMU_CFLAGS="-Wstrict-prototypes -Wredun
+ QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
+ QEMU_CFLAGS="-U_FORTIFY_SOURCE $QEMU_CFLAGS"
+ QEMU_CFLAGS="-I. -I\$(SRC_PATH) $QEMU_CFLAGS"
++QEMU_CFLAGS="$QEMU_CFLAGS $CFLAGS"
+ LDFLAGS="-g $LDFLAGS"
+ 
+ gcc_flags="-Wold-style-declaration -Wold-style-definition"

meta/recipes-devtools/qemu/qemu_0.12.4.bb

@@ -1,6 +1,6 @@
 require qemu.inc
 
-PR = "r22"
+PR = "r23"
 
 FILESPATH = "${FILE_DIRNAME}/qemu-${PV}"
 FILESDIR = "${WORKDIR}"
@@ -21,6 +21,7 @@ SRC_URI = "\
     file://arm-cp15-fix.patch \
     file://cursor-shadow-fix.patch \
     file://vmware-vga-fifo-rewind.patch \
+    file://fix-configure-checks.patch \
     file://powerpc_rom.bin"
 
 do_install_append () {