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default features: make musl usable without feature test macros

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the old behavior of exposing nothing except plain ISO C can be
obtained by defining __STRICT_ANSI__ or using a compiler option (such
as -std=c99) that predefines it. the new default featureset is POSIX
with XSI plus _BSD_SOURCE. any explicit feature test macros will
inhibit the default.

installation docs have also been updated to reflect this change.
This commit is contained in:
Rich Felker 2012-09-07 23:13:55 -04:00
commit c1a9658bd1
48 changed files with 102 additions and 129 deletions
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9
include/assert.h
View file

@ -1,11 +1,6 @@
#undef assert
#include <features.h>
#if __STDC_VERSION__ >= 201112L
#elif defined(__GNUC__)
#define _Noreturn __attribute__((__noreturn__))
#else
#define _Noreturn
#endif
#undef assert
#ifdef NDEBUG
#define assert(x) (void)0