systemd: disable problematic GCC 5.2 optimizations

This fixes systemd failing to start on Raspberry Pi 2 if it is compiled
with GCC 5.2.

It would try to start "Journal Service" and "udev Kernel Device Manager"
but fail repeatedly.

[YOCTO #8291]

(From OE-Core rev: 8572b883730d68fa2e9bc46375383f5f1edfae7e)

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/meta/recipes-core/systemd/systemd_225.bb b/meta/recipes-core/systemd/systemd_225.bb
index f7d4c7df48..fd1a3f315a 100644
--- a/meta/recipes-core/systemd/systemd_225.bb
+++ b/meta/recipes-core/systemd/systemd_225.bb
@@ -123,6 +123,9 @@ EXTRA_OECONF = " --with-rootprefix=${rootprefix} \
 # uclibc does not have NSS
 EXTRA_OECONF_append_libc-uclibc = " --disable-myhostname "
 
+# disable problematic GCC 5.2 optimizations [YOCTO #8291]
+FULL_OPTIMIZATION_append_arm = " -fno-schedule-insns -fno-schedule-insns2"
+
 do_configure_prepend() {
         export NM="${HOST_PREFIX}gcc-nm"
         export AR="${HOST_PREFIX}gcc-ar"