[PATCH] configure.ac: Add -fno-strict-aliasing to CFLAGS

[Julien Cristau]

On Mon, Oct 17, 2011 at 11:37:08 -0700, Jeremy Huddleston wrote:

> This should force the server to have -fno-strict-aliasing even once it
> is removed from the warning flags.
> 
> See: https://bugs.freedesktop.org/show_bug.cgi?id=31238
> 
> Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
> ---
>  configure.ac |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git xorg-server-1.11.1/configure.ac xorg-server-1.11.1/configure.ac
> index 4656a83..538aa88 100644
> --- xorg-server-1.11.1/configure.ac
> +++ xorg-server-1.11.1/configure.ac
> @@ -87,6 +87,12 @@ XORG_PROG_RAWCPP
>  # easier overrides at build time.
>  XSERVER_CFLAGS='$(CWARNFLAGS)'
>  
> +dnl Explicitly add -fno-strict-aliasing since this option should disappear
> +dnl from util-macros CWARNFLAGS
> +if  test "x$GCC" = xyes ; then
> +    XSERVER_CFLAGS="$XSERVER_CFLAGS -fno-strict-aliasing"
> +fi
> +
>  dnl Check for dtrace program (needed to build Xserver dtrace probes)
>  dnl Also checks for <sys/sdt.h>, since some Linux distros have an 
>  dnl ISDN trace program named dtrace

ack in principle, although the comment is going to look slightly odd
if/when CWARNFLAGS actually drops the flag.

Cheers,
Julien