On 2013-10-10 14:38, Jason White wrote: > [email protected] <[email protected]> wrote: > > > Compilers have manifest defines that may intrude into the default namespace. > > It's sometimes useful in portable code > > Is it legitimate for them not to begin with __ however?
Has *anybody* read the Stackoverflow post? It points at the GNU GCC documentation regarding this: > $ cpp --std=c89 -dM < /dev/null | grep linux > #define __linux 1 > #define __linux__ 1 > #define __gnu_linux__ 1 > > $ cpp --std=gnu89 -dM < /dev/null | grep linux > #define __linux 1 > #define __linux__ 1 > #define __gnu_linux__ 1 > #define linux 1 > > $ cpp --std=c99 -dM < /dev/null | grep linux > #define __linux 1 > #define __linux__ 1 > #define __gnu_linux__ 1 > > $ cpp --std=gnu99 -dM < /dev/null | grep linux > #define __linux 1 > #define __linux__ 1 > #define __gnu_linux__ 1 > #define linux 1 The comment links to the last paragraph here: http://gcc.gnu.org/onlinedocs/cpp/System_002dspecific-Predefined-Macros.html#System_002dspecific-Predefined-Macros -- Regards, Matthew Cengia
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