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[build] Add --divide to ASFLAGS if supported by the assembler

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Some builds of the GNU assembler will treat a '/' character as a
comment delimiter.  Adding "--divide" will cause it to be treated as a
division operator, as we expect.  The "--divide" option is not
available in all gas versions, so apply it only conditionally.

Suggested-by: Joshua Oreman <oremanj@rwcr.net>
This commit is contained in:
Michael Brown 2009-03-31 07:01:06 +01:00
parent b0c818d7b5
commit e3b9e3d04b
1 changed files with 8 additions and 0 deletions
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8
src/Makefile.housekeeping
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@ -126,6 +126,14 @@ SP_FLAGS := $(shell $(SP_TEST) && $(ECHO) '-fno-stack-protector')
CFLAGS += $(SP_FLAGS)
endif
# Some versions of gas choke on division operators, treating them as
# comment markers. Specifying --divide will work around this problem,
# but isn't available on older gas versions.
#
DIVIDE_TEST = $(AS) --divide /dev/null -o /dev/null 2>/dev/null
DIVIDE_FLAGS := $(shell $(DIVIDE_TEST) && $(ECHO) '--divide')
ASFLAGS += $(DIVIDE_FLAGS)
###############################################################################
#
# Build verbosity