TX6 Release 2013-04-22

[karo-tx-uboot.git] / arch / arm / config.mk

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 6d6109e62e59eab0b7f7668f5ff0527dac439728..5ef80c49ac01e9dbcb4e99586a58ae28ad1855c1 100644 (file)
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -87,3 +87,21 @@ endif
 ifndef CONFIG_NAND_SPL
 LDFLAGS_u-boot += -pie
 endif
+
+#
+# FIXME: binutils versions < 2.22 have a bug in the assembler where
+# branches to weak symbols can be incorrectly optimized in thumb mode
+# to a short branch (b.n instruction) that won't reach when the symbol
+# gets preempted
+#
+# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
+#
+ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
+ifeq ($(GAS_BUG_12532),)
+export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
+       then echo y; else echo n; fi)
+endif
+ifeq ($(GAS_BUG_12532),y)
+PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
+endif
+endif