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Feature test macros overhaul: C++ TR1

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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>
This commit is contained in:
Yaakov Selkowitz 2016-03-23 16:14:00 -05:00
parent b59866f806
commit b9bbe1bccb
1 changed files with 5 additions and 5 deletions
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10
newlib/libc/include/sys/features.h
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@ -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