arm: Enable -ffunction-sections / -fdata-sections / --gc-sections

[platform/kernel/u-boot.git] / arch / arm / config.mk

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 3f4453a..dc64160 100644 (file)
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -24,13 +24,19 @@
 CROSS_COMPILE ?= arm-linux-
 
 ifndef CONFIG_STANDALONE_LOAD_ADDR
-ifeq ($(SOC),omap3)
+ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TI814X),)
 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
 else
 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
 endif
 endif
 
+LDFLAGS_FINAL += --gc-sections
+PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
+
+# Support generic board on ARM
+__HAVE_ARCH_GENERIC_BOARD := y
+
 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
 
 # Choose between ARM/Thumb instruction sets
@@ -84,6 +90,22 @@ endif
 endif
 
 # needed for relocation
-ifndef CONFIG_NAND_SPL
 LDFLAGS_u-boot += -pie
+
+#
+# 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