[PATCH] Feature test macros overhaul: C++ TR1

[Corinna Vinschen]

On Mar 23 16:19, Yaakov Selkowitz wrote:
> While C++11 was the first version of the standard to use C99 functionality,
> TR1 (for C++03) also does, and G++ does not distinguish between C++98 and
> C++03, or when TR1 is in use.  Therefore, while not strictly correct for
> "pure" C++98, enabling C99 for all C++ usage is the simplest solution (and
> much better than always using -D_GNU_SOURCE as on Linux).
> 
> See thread starting: https://sourceware.org/ml/newlib/2016/msg00297.html
> 
> Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
> ---
>  newlib/libc/include/sys/features.h | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
> index 1625495..86297de 100644
> --- a/newlib/libc/include/sys/features.h
> +++ b/newlib/libc/include/sys/features.h
> @@ -81,7 +81,7 @@ extern "C" {
>   * _XOPEN_SOURCE >= 700
>   *	SUSv4 (POSIX.1-2008 plus XSI)
>   *
> - * _ISOC99_SOURCE or gcc -std=c99 or g++ -std=c++11
> + * _ISOC99_SOURCE or gcc -std=c99 or g++
>   * 	ISO C99
>   *
>   * _ISOC11_SOURCE or gcc -std=c11 or g++ -std=c++11
> @@ -204,8 +204,8 @@ extern "C" {
>   *
>   * __ISO_C_VISIBLE >= 1999
>   * 	ISO C99; enabled with gcc -std=c99 or newer (on by default since GCC 5),
> - * 	g++ -std=c++11 or newer (on by default since GCC 6), or with
> - * 	_ISOC99_SOURCE, _POSIX_C_SOURCE >= 200112L, or _XOPEN_SOURCE >= 600.
> + * 	any version of C++, or with _ISOC99_SOURCE, _POSIX_C_SOURCE >= 200112L,
> + * 	or _XOPEN_SOURCE >= 600.
>   *
>   * __ISO_C_VISIBLE >= 2011
>   * 	ISO C11; enabled with gcc -std=c11 or newer (on by default since GCC 5),
> @@ -259,8 +259,8 @@ extern "C" {
>  #if defined(_ISOC11_SOURCE) || \
>    (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
>  #define	__ISO_C_VISIBLE		2011
> -#elif defined(_ISOC99_SOURCE) || \
> -  (__STDC_VERSION__ - 0) >= 199901L || (_POSIX_C_SOURCE - 0) >= 200112L
> +#elif defined(_ISOC99_SOURCE) || (_POSIX_C_SOURCE - 0) >= 200112L || \
> +  (__STDC_VERSION__ - 0) >= 199901L || defined(__cplusplus)
>  #define	__ISO_C_VISIBLE		1999
>  #else
>  #define	__ISO_C_VISIBLE		1990
> -- 
> 2.7.0

Please apply.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat
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