diff options
| -rw-r--r-- | doc/info/chap/introduction.texinfo | 54 | ||||
| -rw-r--r-- | include/slibc/attributes.h | 131 | ||||
| -rw-r--r-- | include/slibc/c-version.h | 81 | ||||
| -rw-r--r-- | include/slibc/features.h | 191 | ||||
| -rw-r--r-- | include/slibc/portability.h | 195 |
5 files changed, 521 insertions, 131 deletions
diff --git a/doc/info/chap/introduction.texinfo b/doc/info/chap/introduction.texinfo index 43f4898..1501dc0 100644 --- a/doc/info/chap/introduction.texinfo +++ b/doc/info/chap/introduction.texinfo @@ -336,5 +336,59 @@ Enables functionality from @i{System V Interface Description} (@sc{SVID}), as well as @sc{ISO}@tie{}C, @sc{POSIX}.1, @sc{POSIX}.2, and X/Open. +@item _XOPEN_SOURCE +@cpindex X/Open Portability Guide +@lvindex _XOPEN_SOURCE +Enables functionality from @i{X/Open Portability Guide}, +included in @sc{BSD} and @sc{SVID}, as well as +@sc{POSIX}.1 and @sc{POSIX}.2. + +@item _XOPEN_SOURCE_EXTENDED +@cpindex X/Open Portability Guide +@lvindex _XOPEN_SOURCE +@lvindex _XOPEN_SOURCE_EXTENDED +Enables all functionality that @code{_XOPEN_SOURCE} +enables, and functionality that is required for the +X/Open Unix brand. + +@item _XOPEN_SOURCE >= 500 +@cpindex X/Open Portability Guide +@cpindex Single Unix Specification +@cpindex @sc{SUS} +@lvindex _XOPEN_SOURCE +@lvindex _XOPEN_SOURCE_EXTENDED +Enables all functionality that @code{_XOPEN_SOURCE_EXTENDED} +enables. It also enables functionality from version 2 +of the @i{Single Unix Specification} (@sc{SUS}). + +@item _GNU_SOURCE +@cpindex @sc{GNU}'s not Unix +@cpindex @sc{GNU} C Libraries +@lvindex _GNU_SOURCE +Enables all functionality from @sc{ISO}@tie{}C89, +@sc{ISO}@tie{}C99, @sc{POSIX}.1, @sc{POSIX}.2, +@sc{BSD}, @sc{SVID}, X/Open, @sc{SUS}, the +Large File Support extension, and extensions +derived from the @sc{GNU} C Libraries. It also +defines @code{_ATFILE_SOURCE}. + +@lvindex _BSD_SOURCE +@sc{POSIX}.1 takes precedence when there are +conflicts between @sc{POSIX}.1 and @sc{BSD} +or @sc{SVID}. To override this, define +@code{_BSD_SOURCE}. + +@code{_GNU_SOURCE} does not automatically +define @code{_BSD_SOURCE} or @code{_SVID_SOURCE}. + @end table +@c TODO: _LARGEFILE_SUPPORT +@c TODO: _LARGEFILE64_SUPPORT +@c TODO: _FILE_OFFSET_BITS +@c TODO: _ATFILE_SOURCE +@c TODO: _DEFAULT_SOURCE +@c TODO: _REETRANT +@c TODO: _THREADSAFE (alias for _REETRANT) +@c TODO: _POSIX_C_SOURCE >= 200112L +@c TODO: _POSIX_C_SOURCE >= 200809L diff --git a/include/slibc/attributes.h b/include/slibc/attributes.h new file mode 100644 index 0000000..3243ff6 --- /dev/null +++ b/include/slibc/attributes.h @@ -0,0 +1,131 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/* This file should be included from and only from <slibc/features.h>. */ +/* These definitions are only to be used in slibc header-files. */ + + +/* Clear old definitions. */ +#ifdef __noreturn +# undef __noreturn +#endif +#ifdef __GCC_ONLY +# undef __GCC_ONLY +#endif +#ifdef __SLIBC_ONLY +# undef __SLIBC_ONLY +#endif +#ifdef __deprecated +# undef __deprecated +#endif +#ifdef __warning +# undef __warning +#endif +#ifdef __slibc_warning +# undef __slibc_warning +#endif +#ifdef __bsd_posix_conflict +# undef __bsd_posix_conflict +#endif + + + +/** + * Specifies that a function never returns, that is, + * the process exits before the function returns. + */ +#if !defined(__C11__) && defined(__GNUC__) +# define __noreturn __attribute__((noreturn)) +#elif defined(__C11__) +# define __noreturn _Noreturn +#else +# define __noreturn /* ignore */ +#endif + + +/** + * Macro used to exclude code unless GCC is used. + */ +#if defined(__GNUC__) +# define __GCC_ONLY(...) __VA_ARGS__ +#else +# define __GCC_ONLY(...) /* ignore */ +#endif + + +/** + * Macro used to exclude code unless `_SLIBC_SOURCE` is set. + */ +#if defined(_SLIBC_SOURCE) +# define __SLIBC_ONLY(...) __VA_ARGS__ +#else +# define __SLIBC_ONLY(...) /* ignore */ +#endif + + +/** + * Mark a function, variable or type as deprecated, + * with a message that tells the user why the the + * function is deprecated, or functions to use instead. + */ +#if !defined(_SLIBC_SUPPRESS_WARNINGS) +# define __deprecated(msg) __GCC_ONLY(__attribute__((deprecated(msg)))) +#else +# define __deprecated(msg) /* ignore */ +#endif + + +/** + * Warn if a function, variable or type is used. + */ +#if !defined(_SLIBC_SUPPRESS_WARNINGS) +# define __warning(msg) __GCC_ONLY(__attribute__((warning(msg)))) +# define __slibc_warning(msg) __SLIBC_ONLY(__warning(msg)) +#else +# define __warning(msg) /* ignore */ +# define __slibc_warning(msg) /* ignore */ +#endif + + +/** + * Functions that have a BSD-specification that is conficting + * with the POSIX-specification shall have this attribute. + */ +#if defined(_BSD_SOURCE) && !defined(_POSIX_COMPATIBLE_SOURCE) && !defined(_BSD_COMPATIBLE_SOURCE) +# define __bsd_posix_conflict \ + __warning("The BSD-version of this function is incompatible with the POSIX-version.") +#else +# define __bsd_posix_conflict /* ignore*/ +#endif + + +/** + * Format for the `format` GCC function attribute, + * for `*printf` functions. + */ +#ifndef slibc_printf +# define slibc_printf printf /* TODO write GCC extension */ +#endif + +/** + * Format for the `format` GCC function attribute, + * for `*scanf` functions. + */ +#ifndef slibc_scanf +# define slibc_scanf scanf /* TODO write GCC extension */ +#endif + diff --git a/include/slibc/c-version.h b/include/slibc/c-version.h new file mode 100644 index 0000000..635ddb4 --- /dev/null +++ b/include/slibc/c-version.h @@ -0,0 +1,81 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/* This file should be included from and only from <slibc/features.h>. */ +/* These definitions are only to be used in slibc header-files. */ + + +/** + * Is C11, or newer, used? + */ +#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)) || defined(__ISOC11_SOURCE) +# if !defined(__C11__) +# define __C11__ +# endif +# if !defined(__ISOC11_SOURCE) +# define __ISOC11_SOURCE +# endif +#endif + +/** + * Is C99, or newer, used? + */ +#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || defined(__ISOC99_SOURCE) || defined(__C11__) +# if !defined(__C99__) +# define __C99__ +# endif +# if !defined(__ISOC99_SOURCE) +# define __ISOC99_SOURCE +# endif +#endif + +/** + * Is C95, or newer, used? + */ +#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199409L)) || defined(__ISOC95_SOURCE) || defined(__C99__) +# if !defined(__C95__) +# define __C95__ +# endif +# if !defined(__ISOC95_SOURCE) +# define __ISOC95_SOURCE +# endif +#endif + +/** + * Is C90, or newer, used? + */ +#if defined(__STDC_VERSION__) || defined(__STDC__) || defined(__C95__) || defined(__ISOC90_SOURCE) +# if !defined(__C90__) +# define __C90__ +# endif +# if !defined(__ISOC90_SOURCE) +# define __ISOC90_SOURCE +# endif +#endif + +/** + * Is C89, or newer, used? + */ +#if defined(__C90__) || defined(__ISOC89_SOURCE) +# if !defined(__C89__) +# define __C89__ +# endif +# if !defined(__ISOC89_SOURCE) +# define __ISOC89_SOURCE +# endif +#endif + diff --git a/include/slibc/features.h b/include/slibc/features.h index d223d76..499e4f6 100644 --- a/include/slibc/features.h +++ b/include/slibc/features.h @@ -22,198 +22,127 @@ /* These definitions are only to be used in slibc header-files. */ -/** - * Macro that is defined if portability shall be ensured. - */ -#if defined(_PORTABLE_SOURCE) || defined(_LIBRARY_HEADER) -# define __PORTABLE -#endif +#include "portability.h" +#include "c-version.h" +#include "attributes.h" -/** - * Is C11, or newer, used? - */ -#if __STDC_VERSION__ >= 201112L || defined(_ISOC11_SOURCE) -# define __C11__ -#endif - -/** - * Is C99, or newer, used? - */ -#if __STDC_VERSION__ >= 199901L || defined(_ISOC99_SOURCE) -# define __C99__ -#endif /** - * Is C90, or newer, used? + * _BSD_SOURCE || _SVID_SOURCE || _GNU_SOURCE implies _POSIX_C_SOURCE = 2. */ -#if defined(__STDC_VERSION__) || defined(__STDC__) -# define __C90__ +#if defined(__BSD_SOURCE) || defined(__SVID_SOURCE) || defined(__GNU_SOURCE) +# if (__POSIX_C_SOURCE <= 1L) +# undef __POSIX_C_SOURCE +# endif +# if !defined(__POSIX_C_SOURCE) +# define __POSIX_C_SOURCE 2L +# endif #endif - - /** - * _POSIX_SOURCE is implied if (_POSIX_C_SOURCE >= 1L). + * _SVID_SOURCE implies _XOPEN_SOURCE. */ -#if !defined(_POSIX_SOURCE) && defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 1L) -# define _POSIX_SOURCE 1 -#endif -#if (!defined(_POSIX_C_SOURCE) || (_POSIX_C_SOURCE <= 0)) && !defined(_POSIX_SOURCE) -# define _POSIX_C_SOURCE 1L +#if defined(__SVID_SOURCE) && !defined(__XOPEN_SOURCE) +# define __XOPEN_SOURCE 1L #endif /** - * _BSD_SOURCE || _SVID_SOURCE implies _POSIX_C_SOURCE = 2. + * _GNU_SOURCE implies _XOPEN_SOURCE = 500. */ -#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) -# if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE < 1L) -# undef _POSIX_C_SOURCE +#if defined(__GNU_SOURCE) +# if __XOPEN_SOURCE <= 499L +# undef __XOPEN_SOURCE # endif -# if !defined(_POSIX_C_SOURCE) -# define _POSIX_C_SOURCE 2 +# if !defined(__XOPEN_SOURCE) +# define __XOPEN_SOURCE 500L # endif #endif /** - * _SVID_SOURCE implies _XOPEN_SOURCE + * _XOPEN_SOURCE >= 500 implies _XOPEN_SOURCE_EXTENDED. */ -#if defined(_SVID_SOURCE) && !defined(_XOPEN_SOURCE) -# define _XOPEN_SOURCE 1 +#if (__XOPEN_SOURCE >= 500L) && !defined(__XOPEN_SOURCE_EXTENDED) +# define __XOPEN_SOURCE_EXTENDED 1L #endif /** - * _BSD_COMPATIBLE_SOURCE requires _BSD_SOURCE. + * _XOPEN_SOURCE_EXTENDED implies _XOPEN_SOURCE. */ -#if defined(_BSD_COMPATIBLE_SOURCE) && !defined(_BSD_SOURCE) -# if !defined(_SLIBC_SUPPRESS_WARNINGS) -# warning "_BSD_COMPATIBLE_SOURCE is defined, but _BSD_SOURCE is undefined." -# endif +#if defined(__XOPEN_SOURCE_EXTENDED) && !defined(__XOPEN_SOURCE) +# define __XOPEN_SOURCE 1L #endif /** - * _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE - * are incompatible. + * _XOPEN_SOURCE implies _POSIX_C_SOURCE = 2. */ -#if defined(_BSD_COMPATIBLE_SOURCE) && defined(_POSIX_COMPATIBLE_SOURCE) -# if !defined(_SLIBC_SUPPRESS_WARNINGS) -# warning "You should not define both _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE." +#if defined(__XOPEN_SOURCE) +# if __POSIX_C_SOURCE <= 1L +# undef __POSIX_C_SOURCE +# endif +# if !defined(__POSIX_C_SOURCE) +# define __POSIX_C_SOURCE 2L # endif #endif - /** - * Feature-test macros that also change that - * `_PORTABLE_SOURCE` and `_LIBRARY_HEADER` - * is not defined. + * _POSIX_SOURCE is implied if _POSIX_C_SOURCE >= 1. */ -#if !defined(__PORTABLE) -# if defined(_GNU_SOURCE) -# define __GNU_SOURCE _GNU_SOURCE -# endif -# if defined(_SLIBC_SOURCE) -# define __SLIBC_SOURCE _SLIBC_SOURCE -# endif -# if defined(_BSD_SOURCE) -# define __BSD_SOURCE _BSD_SOURCE -# endif -# if defined(_XOPEN_SOURCE) -# define __XOPEN_SOURCE _XOPEN_SOURCE -# endif -# if defined(_ISOC11_SOURCE) -# define __ISOC11_SOURCE _ISOC11_SOURCE -# endif -#endif -#if defined(_POSIX_SOURCE) -# define __POSIX_SOURCE _POSIX_SOURCE +#if !defined(__POSIX_SOURCE) && (__POSIX_C_SOURCE >= 1L) +# define __POSIX_SOURCE 1L #endif -#if defined(_POSIX_C_SOURCE) -# define __POSIX_C_SOURCE _POSIX_C_SOURCE +#if (__POSIX_C_SOURCE <= 0) && !defined(__POSIX_SOURCE) +# define __POSIX_C_SOURCE 1L #endif - - /** - * Macro used to exclude code unless GCC is used. + * _GNU_SOURCE implies _ISOC89_SOURCE. */ -#if defined(__GNUC__) -# define __GCC_ONLY(...) __VA_ARGS__ -#else -# define __GCC_ONLY(...) /* ignore */ +#if defined(__GNU_SOURCE) && !defined(__ISOC89_SOURCE) +# define __ISOC89_SOURCE #endif - /** - * Specifies that a function never returns, that is, - * the process exits before the function returns. + * _GNU_SOURCE implies _ISOC90_SOURCE. */ -#if !defined(__C11__) && defined(__GNUC__) -# define __noreturn __attribute__((noreturn)) -#elif defined(__C11__) -# define __noreturn _Noreturn -#else -# define __noreturn /* ignore */ +#if defined(__GNU_SOURCE) && !defined(__ISOC90_SOURCE) +# define __ISOC90_SOURCE #endif - /** - * Macro used to exclude code unless `_SLIBC_SOURCE` is set. + * _GNU_SOURCE implies _ISOC95_SOURCE. */ -#if defined(_SLIBC_SOURCE) -# define __SLIBC_ONLY(...) __VA_ARGS__ -#else -# define __SLIBC_ONLY(...) /* ignore */ +#if defined(__GNU_SOURCE) && !defined(__ISOC95_SOURCE) +# define __ISOC95_SOURCE #endif - /** - * Mark a function, variable or type as deprecated, - * with a message that tells the user why the the - * function is deprecated, or functions to use instead. + * _GNU_SOURCE implies _ISOC99_SOURCE. */ -#if !defined(_SLIBC_SUPPRESS_WARNINGS) -# define __deprecated(msg) __GCC_ONLY(__attribute__((deprecated(msg)))) -#else -# define __deprecated(msg) /* ignore */ +#if defined(__GNU_SOURCE) && !defined(__ISOC99_SOURCE) +# define __ISOC99_SOURCE #endif - /** - * Warn if a function, variable or type is used. + * _GNU_SOURCE implies _LARGEFILE_SOURCE. */ -#if !defined(_SLIBC_SUPPRESS_WARNINGS) -# define __warning(msg) __GCC_ONLY(__attribute__((warning(msg)))) -# define __slibc_warning(msg) __SLIBC_ONLY(__warning(msg)) -#else -# define __warning(msg) /* ignore */ -# define __slibc_warning(msg) /* ignore */ +#if defined(__GNU_SOURCE) && !defined(__LARGEFILE_SOURCE) +# define __LARGEFILE_SOURCE 1L #endif - /** - * Functions that have a BSD-specification that is conficting - * with the POSIX-specification shall have this attribute. + * _GNU_SOURCE implies _LARGEFILE64_SOURCE. */ -#if defined(_BSD_SOURCE) && !defined(_POSIX_COMPATIBLE_SOURCE) && !defined(_BSD_COMPATIBLE_SOURCE) -# define __bsd_posix_conflict \ - __warning("The BSD-version of this function is incompatible with the POSIX-version.") -#else -# define __bsd_posix_conflict /* ignore*/ +#if defined(__GNU_SOURCE) && !defined(__LARGEFILE64_SOURCE) +# define __LARGEFILE64_SOURCE 1L #endif - /** - * Format for the `format` GCC function attribute, - * for `*printf` functions. + * _GNU_SOURCE implies _ATFILE_SOURCE. */ -#define slibc_printf printf /* TODO write GCC extension */ - -/** - * Format for the `format` GCC function attribute, - * for `*scanf` functions. - */ -#define slibc_scanf scanf /* TODO write GCC extension */ - +#if defined(__GNU_SOURCE) && !defined(__ATFILE_SOURCE) +# define __ATFILE_SOURCE 1L +#endif #endif diff --git a/include/slibc/portability.h b/include/slibc/portability.h new file mode 100644 index 0000000..5eae353 --- /dev/null +++ b/include/slibc/portability.h @@ -0,0 +1,195 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/* This file should be included from and only from <slibc/features.h>. */ +/* These definitions are only to be used in slibc header-files. */ + + +/* Clear old definitions. */ +#ifdef __PORTABLE +# undef __PORTABLE +#endif +#ifdef __ISOC89_SOURCE +# undef __ISOC89_SOURCE +#endif +#ifdef __ISOC90_SOURCE +# undef __ISOC90_SOURCE +#endif +#ifdef __ISOC95_SOURCE +# undef __ISOC95_SOURCE +#endif +#ifdef __ISOC99_SOURCE +# undef __ISOC99_SOURCE +#endif +#ifdef __ISOC11_SOURCE +# undef __ISOC11_SOURCE +#endif +#ifdef __POSIX_SOURCE +# undef __POSIX_SOURCE +#endif +#ifdef __POSIX_C_SOURCE +# undef __POSIX_C_SOURCE +#endif +#ifdef __SVID_SOURCE +# undef __SVID_SOURCE +#endif +#ifdef __XOPEN_SOURCE +# undef __XOPEN_SOURCE +#endif +#ifdef __XOPEN_SOURCE_EXTENDED +# undef __XOPEN_SOURCE_EXTENDED +#endif +#ifdef __SUS_SOURCE +# undef __SUS_SOURCE +#endif +#ifdef __GNU_SOURCE +# undef __GNU_SOURCE +#endif +#ifdef __DEFAULT_SOURCE +# undef __DEFAULT_SOURCE +#endif +#ifdef __ATFILE_SOURCE +# undef __ATFILE_SOURCE +#endif +#ifdef __LARGEFILE_SOURCE +# undef __LARGEFILE_SOURCE +#endif +#ifdef __LARGEFILE64_SOURCE +# undef __LARGEFILE64_SOURCE +#endif +#ifdef __FILE_OFFSET_BITS +# undef __FILE_OFFSET_BITS +#endif +#ifdef __REENTRANT +# undef __REENTRANT +#endif + + + + +/** + * Macro that is defined if portability shall be ensured. + */ +#if defined(_PORTABLE_SOURCE) || defined(_LIBRARY_HEADER) +# define __PORTABLE +#endif + +/** + * Internal feature-test macros that also check + * that `_PORTABLE_SOURCE` and `_LIBRARY_HEADER` + * is not defined. + */ +#if !defined(__PORTABLE) +# if defined(_GNU_SOURCE) +# define __GNU_SOURCE _GNU_SOURCE +# endif +# if defined(_SLIBC_SOURCE) +# define __SLIBC_SOURCE _SLIBC_SOURCE +# endif +# if defined(_BSD_SOURCE) +# define __BSD_SOURCE _BSD_SOURCE +# endif +# if defined(_XOPEN_SOURCE) +# define __XOPEN_SOURCE (_XOPEN_SOURCE - 0L) +# endif +# if defined(_XOPEN_SOURCE_EXTENDED) +# define __XOPEN_SOURCE_EXTENDED _XOPEN_SOURCE_EXTENDED +# endif +# if defined(_ISOC11_SOURCE) +# define __ISOC11_SOURCE _ISOC11_SOURCE +# endif +# if defined(_ATFILE_SOURCE) +# define __ATFILE_SOURCE _ATFILE_SOURCE +# endif +# if defined(_DEFAULT_SOURCE) +# define __DEFAULT_SOURCE _DEFAULT_SOURCE +# endif +# if defined(_LARGEFILE_SOURCE) +# define __LARGEFILE_SOURCE _LARGEFILE_SOURCE +# endif +# if defined(_LARGEFILE64_SOURCE) +# define __LARGEFILE64_SOURCE _LARGEFILE64_SOURCE +# endif +# if defined(_FILE_OFFSET_BITS) +# define __FILE_OFFSET_BITS _FILE_OFFSET_BITS +# endif +# if defined(_REENTRANT) || defined(_THREADSAFE) +# define __REENTRANT 1L +# endif +#endif + +/** + * Internal feature-test macros that also check that + * not check `_PORTABLE_SOURCE` or `_LIBRARY_HEADER`. + */ +#if defined(_POSIX_SOURCE) +# define __POSIX_SOURCE _POSIX_SOURCE +#endif +#if defined(_POSIX_C_SOURCE) +# define __POSIX_C_SOURCE _POSIX_C_SOURCE +#endif +#if defined(_ISOC89_SOURCE) +# define __ISOC89_SOURCE _ISOC89_SOURCE +#endif +#if defined(_ISOC90_SOURCE) +# define __ISOC90_SOURCE _ISOC90_SOURCE +#endif +#if defined(_ISOC95_SOURCE) +# define __ISOC95_SOURCE _ISOC95_SOURCE +#endif +#if defined(_ISOC11_SOURCE) +# define __ISOC99_SOURCE _ISOC99_SOURCE +#endif + + +/** + * _POSIX_C_SOURCE has no effect if it is + * zero, set it to zero if it is undefined. + */ +#if !defined(__POSIX_C_SOURCE) +# define __POSIX_C_SOURCE 0L +#endif + +/** + * Add __SUS_SOURCE as an alias for + * __XOPEN_SOURCE >= 500, to simplify + * feature tests + */ +#if defined(__XOPEN_SOURCE) && (__XOPEN_SOURCE >= 500) +# define __SUS_SOURCE 1L +#endif + + +/** + * _BSD_COMPATIBLE_SOURCE requires _BSD_SOURCE. + */ +#if defined(_BSD_COMPATIBLE_SOURCE) && !defined(_BSD_SOURCE) +# if !defined(_SLIBC_SUPPRESS_WARNINGS) +# warning "_BSD_COMPATIBLE_SOURCE is defined, but _BSD_SOURCE is undefined." +# endif +#endif + +/** + * _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE + * are incompatible. + */ +#if defined(_BSD_COMPATIBLE_SOURCE) && defined(_POSIX_COMPATIBLE_SOURCE) +# if !defined(_SLIBC_SUPPRESS_WARNINGS) +# warning "You should not define both _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE." +# endif +#endif + |