diff options
Diffstat (limited to 'include/libc-internal.h')
| -rw-r--r-- | include/libc-internal.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/include/libc-internal.h b/include/libc-internal.h new file mode 100644 index 000000000..83eadc656 --- /dev/null +++ b/include/libc-internal.h @@ -0,0 +1,100 @@ +/* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _LIBC_INTERNAL_H +#define _LIBC_INTERNAL_H 1 + +/* Some nice features only work properly with ELF */ +#if defined __HAVE_ELF__ +/* Define ALIASNAME as a weak alias for NAME. */ +# define weak_alias(name, aliasname) _weak_alias (name, aliasname) +# define _weak_alias(name, aliasname) \ + extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); +/* Define ALIASNAME as a strong alias for NAME. */ +# define strong_alias(name, aliasname) _strong_alias(name, aliasname) +# define _strong_alias(name, aliasname) \ + extern __typeof (name) aliasname __attribute__ ((alias (#name))); +/* This comes between the return type and function name in + * a function definition to make that definition weak. */ +# define weak_function __attribute__ ((weak)) +# define weak_const_function __attribute__ ((weak, __const__)) +/* Tacking on "\n\t#" to the section name makes gcc put it's bogus + * section attributes on what looks like a comment to the assembler. */ +# if defined(__cris__) +# define link_warning(symbol, msg) +# else +# define link_warning(symbol, msg) \ + asm (".section " ".gnu.warning." #symbol "\n\t.previous"); \ + static const char __evoke_link_warning_##symbol[] \ + __attribute__ ((unused, section (".gnu.warning." #symbol "\n\t#"))) = msg; +#endif +#else /* !defined __HAVE_ELF__ */ +# define strong_alias(name, aliasname) _strong_alias (name, aliasname) +# define weak_alias(name, aliasname) _strong_alias (name, aliasname) +# define _strong_alias(name, aliasname) \ + __asm__(".global " __C_SYMBOL_PREFIX__ #aliasname "\n" \ + ".set " __C_SYMBOL_PREFIX__ #aliasname "," __C_SYMBOL_PREFIX__ #name); +# define link_warning(symbol, msg) \ + asm (".stabs \"" msg "\",30,0,0,0\n\t" \ + ".stabs \"" #symbol "\",1,0,0,0\n"); +#endif + +#ifndef weak_function +/* If we do not have the __attribute__ ((weak)) syntax, there is no way we + can define functions as weak symbols. The compiler will emit a `.globl' + directive for the function symbol, and a `.weak' directive in addition + will produce an error from the assembler. */ +# define weak_function /* empty */ +# define weak_const_function /* empty */ +#endif + +/* On some platforms we can make internal function calls (i.e., calls of + functions not exported) a bit faster by using a different calling + convention. */ +#ifndef internal_function +# define internal_function /* empty */ +#endif + +/* Prepare for the case that `__builtin_expect' is not available. */ +#if __GNUC__ == 2 && __GNUC_MINOR__ < 96 +#define __builtin_expect(x, expected_value) (x) +#endif +#ifndef likely +# define likely(x) __builtin_expect((!!(x)),1) +#endif +#ifndef unlikely +# define unlikely(x) __builtin_expect((!!(x)),0) +#endif +#ifndef __LINUX_COMPILER_H +#define __LINUX_COMPILER_H +#endif +#ifndef __cast__ +#define __cast__(_to) +#endif + +/* Arrange to hide uClibc internals */ +#if __GNUC_PREREQ (3, 3) +# define attribute_hidden __attribute__ ((visibility ("hidden"))) +#else +# define attribute_hidden +#endif + +/* --- this is added to integrate linuxthreads */ +#define __USE_UNIX98 1 + +#endif /* _LIBC_INTERNAL_H */ |