fluencelabs/musl
1
0
Fork 0
mirror of https://github.com/fluencelabs/musl synced 2025-06-12 22:41:37 +00:00
Code Issues Projects Releases Wiki Activity

further use of _Noreturn, for non-plain-C functions

Browse Source 
note that POSIX does not specify these functions as _Noreturn, because
POSIX is aligned with C99, not the new C11 standard. when POSIX is
eventually updated to C11, it will almost surely give these functions
the _Noreturn attribute. for now, the actual _Noreturn keyword is not
used anyway when compiling with a c99 compiler, which is what POSIX
requires; the GCC __attribute__ is used instead if it's available,
however.

in a few places, I've added infinite for loops at the end of _Noreturn
functions to silence compiler warnings. presumably
__buildin_unreachable could achieve the same thing, but it would only
work on newer GCCs and would not be portable. the loops should have
near-zero code size cost anyway.

like the previous _Noreturn commit, this one is based on patches
contributed by philomath.
This commit is contained in:
Rich Felker
2012-09-06 23:34:10 -04:00
parent 453059571c
commit 0c05bd3a9c
11 changed files with 47 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/unistd.h
View File

@ -11,6 +11,13 @@ extern "C" {
#define __restrict
#endif
#if __STDC_VERSION__ >= 201112L
#elif defined(__GNUC__)
#define _Noreturn __attribute__((__noreturn__))
#else
#define _Noreturn
#endif
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
@ -90,7 +97,7 @@ int execl(const char *, const char *, ...);
int execvp(const char *, char *const []);
int execlp(const char *, const char *, ...);
int fexecve(int, char *const [], char *const []);
void _exit(int);
_Noreturn void _exit(int);
pid_t getpid(void);
pid_t getppid(void);