config.mk: Check for -fstack-usage support

[people/ms/u-boot.git] / config.mk

diff --git a/config.mk b/config.mk
index ddaa4775cd972a55623b6c783ce9b82f7b969d6e..fa33e628513ce78c097f33821f77794a569c74d4 100644 (file)
--- a/config.mk
+++ b/config.mk
@@ -108,13 +108,12 @@ HOSTCFLAGS        += -pedantic
 # only supported compiler options are used
 #
 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
-
-$(if $(wildcard $(CC_OPTIONS_CACHE_FILE)),,\
-       $(shell mkdir -p $(dir $(CC_OPTIONS_CACHE_FILE))))
+CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
 
 -include $(CC_OPTIONS_CACHE_FILE)
 
-cc-option-sys = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
+cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
+               if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
                > /dev/null 2>&1; then \
                echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
                echo "$(1)"; fi)
@@ -233,6 +232,10 @@ CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
               $(call cc-option,-Wno-format-security)
 CFLAGS += $(CFLAGS_WARN)
 
+# Report stack usage if supported
+CFLAGS_STACK := $(call cc-option,-fstack-usage)
+CFLAGS += $(CFLAGS_STACK)
+
 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 # option to the assembler.
 AFLAGS_DEBUG :=