diff options
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 36 |
1 files changed, 12 insertions, 24 deletions
@@ -260,9 +260,17 @@ LDFLAG-fuse-ld := $(filter -fuse-ld=%,$(call qstrip,$(UCLIBC_EXTRA_CFLAGS))) # Could use -Wl,--script,$(top_srcdir)extra/scripts/none.lds as well. $(eval $(call check-ld-var,--no-warn-mismatch)) +$(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion)) +GCC_VER := $(subst ., ,$(GCC_VER)) +GCC_MAJOR_VER ?= $(word 1,$(GCC_VER)) +GCC_MINOR_VER ?= $(word 2,$(GCC_VER)) + # Flags in OPTIMIZATION are used only for non-debug builds OPTIMIZATION:= +OPTIMIZATION-$(GCC_MAJOR_VER):= +OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER):= + # Use '-Os' optimization if available, else use -O2, allow Config to override $(eval $(call check-gcc-var,-Os)) ifneq ($(CFLAG_-Os),) @@ -273,31 +281,9 @@ OPTIMIZATION += $(CFLAG_-O2) endif # Use the gcc 3.4 -funit-at-a-time optimization when available $(eval $(call check-gcc-var,-funit-at-a-time)) -OPTIMIZATION += $(CFLAG_-funit-at-a-time) -# shrinks code by about 0.1% -$(eval $(call check-gcc-var,-fmerge-all-constants)) +OPTIMIZATION-3.4 += $(CFLAG_-funit-at-a-time) $(eval $(call check-gcc-var,-fstrict-aliasing)) -OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing) - -$(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion)) -GCC_VER := $(subst ., ,$(GCC_VER)) -GCC_MAJOR_VER ?= $(word 1,$(GCC_VER)) -#GCC_MINOR_VER ?= $(word 2,$(GCC_VER)) - -ifneq ($(TARGET_ARCH),arc) -ifeq ($(GCC_MAJOR_VER),4) -# shrinks code, results are from 4.0.2 -# 0.36% -$(eval $(call check-gcc-var,-fno-tree-loop-optimize)) -OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize) -# 0.34% -$(eval $(call check-gcc-var,-fno-tree-dominator-opts)) -OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts) -# 0.1% -$(eval $(call check-gcc-var,-fno-strength-reduce)) -OPTIMIZATION += $(CFLAG_-fno-strength-reduce) -endif -endif +OPTIMIZATION += $(CFLAG_-fstrict-aliasing) # CPU_CFLAGS-y contain options which are not warnings, # not include or library paths, and not optimizations. @@ -707,6 +693,8 @@ ifeq ($(DODEBUG),y) CFLAGS += -O0 -g3 -DDEBUG else CFLAGS += $(OPTIMIZATION) +CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER)) +CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER)) endif ifeq ($(DOSTRIP),y) LDFLAGS += -Wl,-s |