On Mon, Aug 5, 2013 at 5:08 PM, Chris Wilson <ch...@chris-wilson.co.uk> wrote:
> Whilst populating the xorg_cv_ cache entries, and the subsequent
> xorg_testset_, we always include the FLAG_PREFIX in the name, to
> distinguish between C and C++ iterations. However, in the body of the
> test function, we dropped the FLAG_PREFIX expansion and so always used
> the empty string and hence did not correctly detect incorrect flags.
>
> The bug was introduced with
> commit 51f69514e65637f575df901ef942515e70314f6a
> Author: Chase Douglas <chase.doug...@canonical.com>
> Date:   Mon Mar 12 11:49:28 2012 -0700
>
>     Separate unknown warning options by language
>
> Reported-by: Sedat Dilek <sedat.di...@gmail.com>
> Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> Cc: Sedat Dilek <sedat.di...@gmail.com>
> Cc: Chase Douglas <chase.doug...@canonical.com>
> Cc: Gaetan Nadon<mems...@videotron.ca>
> ---

Tested-by: Sedat Dilek <sedat.di...@gmail.com> [ as told on intel-gfx ML ]

Can you unify and beautify the output?

checking if clang supports[space]... <--- [space] is not always seen
in the output!

$ grep ^'checking if clang supports'
logs/build-and-install-log_XF86-Video-Intel-v2-21-14_issues-fixed_llvm-3-3.txt
checking if clang supports -Werror=unknown-warning-option... yes
checking if clang supports -Werror=unused-command-line-argument... yes
checking if clang supports-Wall... yes
checking if clang supports-Wpointer-arith... yes
checking if clang supports-Wmissing-declarations... yes
checking if clang supports-Wformat=2... yes
checking if clang supports-Wstrict-prototypes... yes
checking if clang supports-Wmissing-prototypes... yes
checking if clang supports-Wnested-externs... yes
checking if clang supports-Wbad-function-cast... yes
checking if clang supports-Wold-style-definition... yes
checking if clang supports-Wdeclaration-after-statement... yes
checking if clang supports-Wunused... yes
checking if clang supports-Wuninitialized... yes
checking if clang supports-Wshadow... yes
checking if clang supports-Wcast-qual... yes
checking if clang supports-Wmissing-noreturn... yes
checking if clang supports-Wmissing-format-attribute... yes
checking if clang supports-Wredundant-decls... yes
checking if clang supports-Werror=implicit... yes
checking if clang supports-Werror=nonnull... yes
checking if clang supports-Werror=init-self... yes
checking if clang supports-Werror=main... yes
checking if clang supports-Werror=missing-braces... yes
checking if clang supports-Werror=sequence-point... yes
checking if clang supports-Werror=return-type... yes
checking if clang supports-Werror=trigraphs... yes
checking if clang supports-Werror=array-bounds... yes
checking if clang supports-Werror=write-strings... yes
checking if clang supports-Werror=address... yes
checking if clang supports-Werror=int-to-pointer-cast... yes
checking if clang supports-Werror=pointer-to-int-cast... yes
checking if clang supports-pedantic... yes
checking if clang supports-Werror... yes
checking if clang supports-Werror=attributes... yes
checking if clang supports-Wno-cast-qual... yes
checking if clang supports-Wno-redundant-decls... yes
checking if clang supports-Wno-maybe-uninitialized... no
checking if clang supports -fno-rtti -fno-exceptions... yes
checking if clang supports -c -o file.o... yes
checking if clang supports -c -o file.o... (cached) yes

- Sedat -

>  xorg-macros.m4.in | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in
> index d589ebd..cd76fca 100644
> --- a/xorg-macros.m4.in
> +++ b/xorg-macros.m4.in
> @@ -1543,11 +1543,11 @@ fi
>  found="no"
>  m4_foreach([flag], m4_cdr($@), [
>         if test $found = "no" ; then
> -               if test "x$xorg_testset_unknown_warning_option" = "xyes" ; 
> then
> +               if test 
> "x$xorg_testset_]CACHE_PREFIX[_unknown_warning_option" = "xyes" ; then
>                         PREFIX[FLAGS]="$PREFIX[FLAGS] 
> -Werror=unknown-warning-option"
>                 fi
>
> -               if test "x$xorg_testset_unused_command_line_argument" = 
> "xyes" ; then
> +               if test 
> "x$xorg_testset_]CACHE_PREFIX[_unused_command_line_argument" = "xyes" ; then
>                         PREFIX[FLAGS]="$PREFIX[FLAGS] 
> -Werror=unused-command-line-argument"
>                 fi
>
> --
> 1.8.4.rc1
>
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