toolchain-scripts.bbclass: Export M4

some packages use M4 variable from environment and sometimes
its hardcoded to /usr/bin/m4 if not found in environment. Lets
define it such that it is picked from path

(From OE-Core rev: 06c5593d15f206458b9a5b45ed1229abfee16e95)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/classes/toolchain-scripts.bbclass b/meta/classes/toolchain-scripts.bbclass
index 44284c393a..6d8623ccfa 100644
--- a/meta/classes/toolchain-scripts.bbclass
+++ b/meta/classes/toolchain-scripts.bbclass
@@ -26,6 +26,7 @@ toolchain_create_sdk_env_script () {
         echo 'export OBJDUMP=${TARGET_PREFIX}objdump' >> $script
         echo 'export AR=${TARGET_PREFIX}ar' >> $script
         echo 'export NM=${TARGET_PREFIX}nm' >> $script
+        echo 'export M4=m4' >> $script
         echo 'export TARGET_PREFIX=${TARGET_PREFIX}' >> $script
         echo 'export CONFIGURE_FLAGS="--target=${TARGET_SYS} --host=${TARGET_SYS} --build=${SDK_ARCH}-linux --with-libtool-sysroot=${SDKTARGETSYSROOT}"' >> $script
         if [ "${TARGET_OS}" = "darwin8" ]; then