X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fconfig.mk;h=24b9d7c8025710932da3800b030a7321a7f4ee75;hb=82138f4fcd09aecfe764970afeba895de379dc29;hp=4cc99e7613747650227f0b54b952b6405b5906ca;hpb=5356f5451e85695cf8f9782dee54cc8dfa5445e5;p=u-boot

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 4cc99e7613..24b9d7c802 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -44,6 +44,11 @@ PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
 		$(call cc-option,-mno-thumb-interwork,)
 endif
 
+# Only test once
+ifneq ($(CONFIG_SPL_BUILD),y)
+ALL-$(CONFIG_SYS_THUMB_BUILD)	+= checkthumb
+endif
+
 # Try if EABI is supported, else fall back to old API,
 # i. e. for example:
 # - with ELDK 4.2 (EABI supported), use:
@@ -82,3 +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