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[build] Use -maccumulate-outgoing-args if required by gcc

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Current versions of gcc require -maccumulate-outgoing-args if any
sysv_abi functions call ms_abi functions.  This requirement is likely
to be lifted in future gcc versions, so test explicitly to see if the
current version of gcc requires -maccumulate-outgoing-args.

This problem is currently masked since the implied
-fasynchronous-unwind-tables (which is the default in current gcc
versions) implies -maccumulate-outgoing-args.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-11-02 13:21:52 +00:00
parent 6586e03fba
commit f008698c68
1 changed files with 12 additions and 0 deletions
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12
src/arch/x86_64/Makefile
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@ -26,6 +26,18 @@ CFLAGS += -fshort-wchar
# #
CFLAGS += -Ui386 CFLAGS += -Ui386
# Add -maccumulate-outgoing-args if required by this version of gcc
#
ifeq ($(CCTYPE),gcc)
MS_ABI_TEST_CODE := extern void __attribute__ (( ms_abi )) ms_abi(); \
void sysv_abi ( void ) { ms_abi(); }
MS_ABI_TEST = $(ECHO) '$(MS_ABI_TEST_CODE)' | \
$(CC) -m64 -mno-accumulate-outgoing-args -x c -c - -o /dev/null \
>/dev/null 2>&1
MS_ABI_FLAGS := $(shell $(MS_ABI_TEST) || $(ECHO) '-maccumulate-outgoing-args')
WORKAROUND_CFLAGS += $(MS_ABI_FLAGS)
endif
# x86_64-specific directories containing source files # x86_64-specific directories containing source files
# #
SRCDIRS += arch/x86_64/prefix SRCDIRS += arch/x86_64/prefix