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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
parent 9f65796c35
commit c1a9658bd1
48 changed files with 102 additions and 129 deletions
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13
include/unistd.h
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@ -5,18 +5,7 @@
extern "C" {
#endif
#if __STDC_VERSION__ >= 199901L
#define __restrict restrict
#elif !defined(__GNUC__)
#define __restrict
#endif
#if __STDC_VERSION__ >= 201112L
#elif defined(__GNUC__)
#define _Noreturn __attribute__((__noreturn__))
#else
#define _Noreturn
#endif
#include <features.h>
#define STDIN_FILENO 0
#define STDOUT_FILENO 1