[OE-core] [PATCH 1/1] mtd-utils: add xattr PACKAGECONFIG and fix acl dependency

[Patrick Ohly]

The unconditional removal of -DWITHOUT_XATTR accidentally introduced a
compile-time dependency on "acl", because "sys/acl.h" gets
included. This caused random compile failures.

To fix this, we introduce a proper PACKAGECONFIG for the "xattr"
support, with the distro's "xattr" feature determining the
default. Setting the define must be done with custom code because
PACKAGECONFIG can only influence configure parameters.

The "acl" distro feature is not checked because although enabling
"xattr" support now triggers a build of acl, nothing from it will not
get included in the resulting target image. This seems more suitable
than not enabling xattr support in mtd-utils when acl support in the
distro is disabled.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/recipes-devtools/mtd/mtd-utils_git.bb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-devtools/mtd/mtd-utils_git.bb b/meta/recipes-devtools/mtd/mtd-utils_git.bb
index 8d4892a..17dca77 100644
--- a/meta/recipes-devtools/mtd/mtd-utils_git.bb
+++ b/meta/recipes-devtools/mtd/mtd-utils_git.bb
@@ -19,7 +19,13 @@ SRC_URI = "git://git.infradead.org/mtd-utils.git \
 
 S = "${WORKDIR}/git/"
 
-EXTRA_OEMAKE = "'CC=${CC}' 'RANLIB=${RANLIB}' 'AR=${AR}' 'CFLAGS=${CFLAGS} -I${S}/include' 'BUILDDIR=${S}'"
+# xattr support creates an additional compile-time dependency on acl because
+# the sys/acl.h header is needed. libacl is not needed and thus enabling xattr
+# regardless whether acl is enabled or disabled in the distro should be okay.
+PACKAGECONFIG ?= "${@bb.utils.contains('DISTRO_FEATURES', 'xattr', 'xattr', '', d)}"
+PACKAGECONFIG[xattr] = ",,acl,"
+
+EXTRA_OEMAKE = "'CC=${CC}' 'RANLIB=${RANLIB}' 'AR=${AR}' 'CFLAGS=${CFLAGS} ${@bb.utils.contains('PACKAGECONFIG', 'xattr', '', '-DWITHOUT_XATTR', d)} -I${S}/include' 'BUILDDIR=${S}'"
 
 do_install () {
 	oe_runmake install DESTDIR=${D} SBINDIR=${sbindir} MANDIR=${mandir} INCLUDEDIR=${includedir}
-- 
2.1.4