diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/features.h b/include/features.h index 562dca91f..033cf98d6 100644 --- a/include/features.h +++ b/include/features.h @@ -85,6 +85,11 @@ but are implied by the other feature-test macros defined (or by the lack of any definitions) are defined by the file. */ +/* First, record if user requested some form of large file support. */ +#if defined(_LARGEFILE_SOURCE) || defined(_LARGEFILE64_SOURCE) \ + || (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64) +# define __USER_REQUESTED_LFS_OPTION 1 +#endif /* Undefine everything, so we get a clean slate. */ #undef __USE_ISOC99 @@ -331,6 +336,35 @@ #include <bits/uClibc_config.h> #undef __need_uClibc_config_h +/* Make sure users large file options agree with uClibc's configuration. */ +#ifndef __UCLIBC_HAVE_LFS__ +/* If uClibc was built without large file support, output an error if + * large file functions are requested. */ +#ifdef __USER_REQUESTED_LFS_OPTION +#error uClibc was configured without large file support... +/* Since _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE can be turned by + * other options, disable them with a warning if they were enabled. */ +#elif defined(_LARGEFILE_SOURCE) || defined(_LARGEFILE64_SOURCE) +#warning uClibc was configured without large file support... +#endif +#undef _LARGEFILE_SOURCE +#undef _LARGEFILE64_SOURCE +#undef _FILE_OFFSET_BITS +#undef __USE_LARGEFILE +#undef __USE_LARGEFILE64 +#undef __USE_FILE_OFFSET64 +/* If we're actually building uClibc with large file support, + * define __USE_LARGEFILE64 only. */ +#elif defined(_LIBC) +#undef _LARGEFILE_SOURCE +#undef _LARGEFILE64_SOURCE +#undef _FILE_OFFSET_BITS +#undef __USE_LARGEFILE +#undef __USE_LARGEFILE64 +#undef __USE_FILE_OFFSET64 +#define __USE_LARGEFILE64 1 +#endif + /* Some nice features only work properly with ELF */ #if defined _LIBC && defined HAVE_ELF /* Define ALIASNAME as a weak alias for NAME. */ |