Re: [PATCH] src: Fix checking for clang

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On Thu, Mar 01, 2018 at 05:37:38PM +0100, Andrea Bolognani wrote:
> The check was trying to use the shell variable $CC instead of
> the make variable $(CC); it also interpreted grep's return code
> wrong: 1 means the provided pattern was *not* matched. As a
> result, pdwtags was never run, not even when building with gcc.

Heh, opps.

Yet another reason for us to move these checks into configure.ac
and then use AM_CONDITIONAL to turn on/off the make rule instead
of playing so many games in shell here.

> Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
> ---
>  src/Makefile.am | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/src/Makefile.am b/src/Makefile.am
> index 5794915246..3bf2da543d 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -668,8 +668,7 @@ struct_prefix = ($(libs_prefix)|$(other_prefix))
>  # which causes the comparison against expected output to fail, so skip
>  # if using clang as CC.
>  PDWTAGS = \
> -	$(AM_V_GEN)$CC -v 2>&1 | grep -q clang; \
> -	if test $$? == 1; then \
> +	$(AM_V_GEN)if $(CC) -v 2>&1 | grep -q clang; then \
>  	   echo 'WARNING: skipping pdwtags test with Clang' >&2; \
>  	   exit 0; \
>  	fi; \

Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>


Regards,
Daniel
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