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Date: Tue, 21 Apr 2015 13:38:21 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] configure: check for -march and -mtune passed via
CC
On Tue, Apr 21, 2015 at 10:34:05AM -0700, Andre McCurdy wrote:
> Some build environments pass -march and -mtune as part of CC, therefore
> update configure to check both CC and CFLAGS before making the decision
> to fall back to generic -march and -mtune options for x86.
>
> Signed-off-by: Andre McCurdy <armccurdy@...il.com>
> ---
> configure | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/configure b/configure
> index e35c9b6..f325cda 100755
> --- a/configure
> +++ b/configure
> @@ -391,10 +391,12 @@ tryflag CFLAGS_AUTO -Wa,--noexecstack
> # extensions enabled by default. This is bad for making static binaries.
> # We cheat and use i486 rather than i386 because i386 really does not
> # work anyway (issues with atomic ops).
> +# Some build environments pass -march and -mtune options via CC, so
> +# check both CC and CFLAGS.
> #
> if test "$ARCH" = "i386" ; then
> -fnmatch '-march=*|*\ -march=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -march=i486
> -fnmatch '-mtune=*|*\ -mtune=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic
> +fnmatch '-march=*|*\ -march=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -march=i486
> +fnmatch '-mtune=*|*\ -mtune=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic
It's questionable whether we should have this code to begin with, but
as long as we do, I agree the change you proposed is correct. I'll
apply it. Thanks!
Rich
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