1 /* This file is only used if enabled in the build system, in which case it is
2 * included automatically via command line options. It is not included
3 * explicitly by any source files or other headers. Its purpose is to
4 * override default visibilities to reduce the size and performance costs
5 * of position-independent code. */
10 /* For shared libc.so, all symbols should be protected, but some toolchains
11 * fail to support copy relocations for protected data, so exclude all
12 * exported data symbols. */
14 __attribute__((__visibility__("default")))
15 extern int optind, opterr, optopt, optreset, __optreset, getdate_err, h_errno, daylight, __daylight, signgam, __signgam;
17 __attribute__((__visibility__("default")))
18 extern long timezone, __timezone;
20 __attribute__((__visibility__("default")))
21 extern char *optarg, **environ, **__environ, *tzname[2], *__tzname[2], *__progname, *__progname_full;
23 #pragma GCC visibility push(protected)
25 #elif defined(__PIC__)
27 /* If building static libc.a as position-independent code, try to make
28 * everything hidden except possibly-undefined weak references. */
30 __attribute__((__visibility__("default")))
31 extern void (*const __init_array_start)(), (*const __init_array_end)(),
32 (*const __fini_array_start)(), (*const __fini_array_end)();
34 #pragma GCC visibility push(hidden)