[PATCH:macros] XORG_TESTSET_CFLAG: Try to both compile & link with the flags

[Gaetan Nadon]

On Thu, 2011-12-01 at 13:14 -0800, Alan Coopersmith wrote:

> Catches build problems caused by compilers that ignore unknown flags
> at compile time and pass them to the linker at link time, when the
> linker considers unknown flags to be fatal errors.
> 
> Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
> ---
>  xorg-macros.m4.in |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in
> index ed908e2..3fd5348 100644
> --- a/xorg-macros.m4.in
> +++ b/xorg-macros.m4.in
> @@ -1492,7 +1492,7 @@ m4_foreach([flag], m4_cdr($@), [
>  		CFLAGS="$CFLAGS ]flag["
>  
>  		AC_MSG_CHECKING([if $CC supports ]flag[])
> -		AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
> +		AC_LINK_IFELSE([AC_LANG_PROGRAM([int i;])],
>  		                  [supported=yes], [supported=no])
>  		AC_MSG_RESULT([$supported])
>  		CFLAGS="$xorg_testset_save_CFLAGS"


On Linux the same "gcc" command is issued which is expected.
It wouldn't hurt the name some of compilers/linkers combination that are
inconsistent in the treatment of unknown flags.

Reviewed-by: Gaetan Nadon <memsize at videotron.ca>

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