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 <[email protected]>
Cc: Tom Rini <[email protected]>
---
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)%=%))
--
1.8.1.2
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