On Mon, 2 Dec 2024, Prathamesh Kulkarni wrote:
> Thanks for the suggestions! Unfortunately, it seems to me that AC_PROG_CC
> also does run tests that
> need modified CFLAGS. I tried the following assertion before invoking
> AC_PROG_CC (for stage-1 build):
>
> if test -z "${CFLAGS}"; then
> AC_MSG_ERROR([CFLAGS must be set.])
> fi
>
> and it seems to pass. So I suppose the default setting of CFLAGS in
> AC_PROG_CC won't be applicable anyway ? I checked what value CFLAGS was
> set to and it turned out to be "-g -O2" (same as default setting in
> AC_PROG_CC, altho I am not quite sure where CFLAGS were set before
> invoking libatomic/configure). Given that the above assert passes, would
> it be safe to add "-fno-link-libatomic" to CFLAGS before invoking
> AC_PROG_CC (and after the assert) ?
Provided the assertion goes together with the addition to CFLAGS (to catch
any cases of someone building libatomic outside of the toplevel GCC build
system), it would probably be safe.
--
Joseph S. Myers
[email protected]
