flex: fix m4 issue on target

Flex needs m4 to run (see below) and, since the create_wrapper
introduces a bash dependency on target, give the path to m4 binary in
the configure command line.

Snippet from the flex documentation:
"The macro processor m4 must be installed wherever flex is installed.
<...>
m4 is only required at the time you run flex."

[YOCTO #5329]

(From OE-Core master rev: 64030f37b34f75144f53eef42d5822ede79e08bd)

(From OE-Core rev: d039150eae579af1bd85000982ef38a6b09bb90d)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/meta/recipes-devtools/flex/flex.inc b/meta/recipes-devtools/flex/flex.inc
index 43f1dda01c..96d5de5f74 100644
--- a/meta/recipes-devtools/flex/flex.inc
+++ b/meta/recipes-devtools/flex/flex.inc
@@ -13,6 +13,9 @@ inherit autotools gettext
 M4 = "${bindir}/m4"
 M4_class-native = "${STAGING_BINDIR_NATIVE}/m4"
 
+EXTRA_OECONF += "ac_cv_path_M4=${M4}"
+EXTRA_OEMAKE += "m4=${STAGING_BINDIR_NATIVE}/m4"
+
 do_install_append_class-native() {
         create_wrapper ${D}/${bindir}/flex M4=${M4}
 }
@@ -20,3 +23,5 @@ do_install_append_class-native() {
 do_install_append_class-nativesdk() {
         create_wrapper ${D}/${bindir}/flex M4=${M4}
 }
+
+RDEPENDS_${PN} += "m4"