As far as I know, gcc does not support -fstack-usage for some targets such as blackfin, m68k, microblaze, etc.
If -fstack-usage option is given for those targets, gcc displays a warning message as follows:
warning: -fstack-usage not supported for this target [enabled by default]
But it still exits with status 0.
So,
# Report stack usage if supported CFLAGS_STACK := $(call cc-option,-fstack-usage) CFLAGS += $(CFLAGS_STACK)
does not work as we expect because cc-option sees exit status to judge whether the given option is supported or not.
To suppress warnings for such targets that -fstack-usage is not supported, this commit surrounds the concerned lines with ifdef CONFIG_CC_STACKUSAGE .. endif.
Signed-off-by: Masahiro Yamada yamada.m@jp.panasonic.com Cc: Tom Rini trini@ti.com --- config.mk | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/config.mk b/config.mk index 48913f6..d405ab4 100644 --- a/config.mk +++ b/config.mk @@ -278,9 +278,9 @@ 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) +ifdef CONFIG_CC_STACKUSAGE +CFLAGS += $(call cc-option,-fstack-usage) +endif
BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))