Snippet in question (mmap.s):
#if !defined(_LARGEFILE_SOURCE) ANSI_PRAGMA_WEAK(mmap,function) #else ANSI_PRAGMA_WEAK(mmap64,function) #endif #include "SYS.h" #include <sys/mman.h> /* Need _MAP_NEW definition */ #if !defined(_LARGEFILE_SOURCE)
Those two checks for _LARGEFILE_SOURCE mayby inconsistent, because
sys/feature_tests.h and _LARGEFILE_SOURCE can be redefined there (sys/feature_tests.h):
#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \ defined(_KERNEL) || defined(_KMEMUSER) || \ defined(__EXTENSIONS__) #undef _LARGEFILE64_SOURCE #define _LARGEFILE64_SOURCE 1 #endif #if _LARGEFILE64_SOURCE - 0 == 1 #undef _LARGEFILE_SOURCE #define _LARGEFILE_SOURCE 1 #endif
Updated by Rich Lowe over 8 years ago
- Status changed from New to Feedback
As best as I can tell, this code is just bad.
The largefile environment when compiling libc shouldn't matter, what's important is the environment of the process actually using libc (and which is set up by the various redefine_extname, etc, tricks we have).
I'm pretty sure that this should be unifdef'd and the true side of the conditions removed, since by any reading I have, they cannot possibly work (or at least, work in a way which is reasonable).