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restore CFLAGS check for conflict and fix recursive CFLAGS issue

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cc-option uses more make-syntax to replace the shell "if/else".

Issue with recursive += is fixed by doing the first assignment
simply-expanded, as explained in
http://www.gnu.org/software/make/manual/html_node/Appending.html

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Thomas Monjalon 2009-09-11 18:45:40 +02:00 • committed by Anthony Liguori
parent 25fe365483
commit fc3baad7bf
2 changed files with 4 additions and 4 deletions
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4
rules.mak
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@ -21,5 +21,5 @@ quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
# cc-option
# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
cc-option = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null \
> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
>/dev/null 2>&1 && echo OK), $2, $3)