[vlc-devel] [PATCH 07/15] configure: Enable extended C++11 support

[Julian Scheel]

On 08.03.2017 16:32, Hugo Beauzée-Luyssen wrote:
> On Wed, Mar 8, 2017, at 03:55 PM, Julian Scheel wrote:
>> VLC uses posix_memalign, which in newlib is not implemented for strict
>> ansi builds.
>>
>> Signed-off-by: Julian Scheel <julian at jusst.de>
>> ---
>>  configure.ac | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/configure.ac b/configure.ac
>> index b1cf33cf40..a1980b6e81 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> @@ -79,7 +79,7 @@ dnl Check for compiler properties
>>  AC_C_CONST
>>  AC_C_INLINE
>>  AC_C_RESTRICT
>> -AX_CXX_COMPILE_STDCXX_11(noext, mandatory)
>> +AX_CXX_COMPILE_STDCXX_11(ext, mandatory)
>>
>>  dnl Extend the --help string at the current spot.
>>  AC_DEFUN([EXTEND_HELP_STRING], [m4_divert_once([HELP_ENABLE], [$1])])
>> --
>> 2.12.0
>>
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>
> Hi,
>
> Shouldn't configure detect it and use the compat version?

Hi,

it's checked with AC_REPLACE_FUNCS. But as we have GNU extensions 
enabled for the C compiler that check sees posix_memalign. For the C++ 
compiler GNU extensions were disabled until now, so it did not provide 
posix_memalign in there.
This patch just unifies C and C++ build wrt GNU extennsions.

-Julian