f008698c68
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>
54 lines
1.4 KiB
Makefile
54 lines
1.4 KiB
Makefile
# Code size reduction.
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#
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CFLAGS += -fstrength-reduce -fomit-frame-pointer
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# Code size reduction. gcc3 needs a different syntax to gcc2 if you
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# want to avoid spurious warnings.
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#
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CFLAGS += -falign-jumps=1 -falign-loops=1 -falign-functions=1
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# Use %rip-relative addressing wherever possible.
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#
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CFLAGS += -fpie
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# Force 64-bit code
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#
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CFLAGS += -m64
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ASFLAGS += --64
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LDFLAGS += -m elf_x86_64
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# EFI requires -fshort-wchar, and nothing else currently uses wchar_t
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#
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CFLAGS += -fshort-wchar
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# We need to undefine the default macro "i386" when compiling .S
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# files, otherwise ".arch i386" translates to ".arch 1"...
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#
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CFLAGS += -Ui386
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# Add -maccumulate-outgoing-args if required by this version of gcc
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#
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ifeq ($(CCTYPE),gcc)
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MS_ABI_TEST_CODE := extern void __attribute__ (( ms_abi )) ms_abi(); \
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void sysv_abi ( void ) { ms_abi(); }
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MS_ABI_TEST = $(ECHO) '$(MS_ABI_TEST_CODE)' | \
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$(CC) -m64 -mno-accumulate-outgoing-args -x c -c - -o /dev/null \
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>/dev/null 2>&1
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MS_ABI_FLAGS := $(shell $(MS_ABI_TEST) || $(ECHO) '-maccumulate-outgoing-args')
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WORKAROUND_CFLAGS += $(MS_ABI_FLAGS)
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endif
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# x86_64-specific directories containing source files
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#
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SRCDIRS += arch/x86_64/prefix
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# Include common x86 Makefile
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#
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MAKEDEPS += arch/x86/Makefile
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include arch/x86/Makefile
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# Include platform-specific Makefile
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#
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MAKEDEPS += arch/x86_64/Makefile.$(PLATFORM)
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include arch/x86_64/Makefile.$(PLATFORM)
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