[Buildroot] [PATCH] binutils: fix bfin compile

[Waldemar Brodkorb]

See gcc bug for details:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77311

Signed-off-by: Waldemar Brodkorb <wbx at openadk.org>
---
 package/binutils/binutils.mk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/package/binutils/binutils.mk b/package/binutils/binutils.mk
index 2936eb5..1defbb1 100644
--- a/package/binutils/binutils.mk
+++ b/package/binutils/binutils.mk
@@ -71,6 +71,12 @@ endif
 BINUTILS_CONF_ENV += ac_cv_prog_MAKEINFO=missing
 HOST_BINUTILS_CONF_ENV += ac_cv_prog_MAKEINFO=missing
 
+# gcc bug with Os/O2/O3
+# error: unable to find a register to spill in class 'CCREGS'
+ifeq ($(BR2_bfin),y)
+BINUTILS_CONF_ENV += CFLAGS="$(TARGET_CFLAGS) -O1"
+endif
+
 # Install binutils after busybox to prefer full-blown utilities
 ifeq ($(BR2_PACKAGE_BUSYBOX),y)
 BINUTILS_DEPENDENCIES += busybox
-- 
2.1.4