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?RCS: $Id: GCC_pipe.U 167 2013-05-08 17:58:00Z rmanfredi $
?RCS:
?RCS: Copyright (c) 2006, Christian Biere
?RCS:
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?MAKE:GCC_pipe: Trylink cat +cc ccflags gccversion optimize
?MAKE: -pick add $@ %<
?T:flag result saved_ccflags
?LINT:change ccflags
: check whether -pipe should be used
flag='-pipe'
case "$gccversion" in
'');;
*)
case "$ccflags $optimize" in
*-save-temps*);;
*-pipe*);;
*)
$cat >try.c <<'EOC'
int main(void)
{
return 0;
}
EOC
saved_ccflags=$ccflags
ccflags="$flag $ccflags"
result=''
cyn="whether '$flag' is accepted by $cc" >&4
set result
eval $trylink
case "$result" in
"$define")
$cat >try.c <<EOC
main("This is not C")
{
(. ||
switch (**1) { case 1: case 1: }
}
EOC
?X: trylink could "Whoa there" if we do not reset this variable
result=''
set result
eval $trylink
case "$result" in
"$define")
echo "However with $flag the compiler seems to see no code." >&4
ccflags=$saved_ccflags
;;
esac
;;
*) ccflags=$saved_ccflags;;
esac
;;
esac
;;
esac
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