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| author | Tavian Barnes <tavianator@tavianator.com> | 2024-08-27 16:23:47 -0400 |
|---|---|---|
| committer | Tavian Barnes <tavianator@tavianator.com> | 2024-08-28 17:33:20 -0400 |
| commit | 4890e2754c238c51497a19b67fb2458ef108f558 (patch) | |
| tree | 1e590b06485b206a7c96c044fbb393b4df73498e /src/prelude.h | |
| parent | 49e8620fe191da4fabc79896d05d56cb531ed673 (diff) | |
| download | bfs-4890e2754c238c51497a19b67fb2458ef108f558.tar.xz | |
prelude: Rely more on __has_include()
Rather than a bunch of manual fallback macros, just provide a fallback
definition that returns false.
Diffstat (limited to 'src/prelude.h')
| -rw-r--r-- | src/prelude.h | 97 |
1 files changed, 14 insertions, 83 deletions
diff --git a/src/prelude.h b/src/prelude.h index 48f377c..7df178c 100644 --- a/src/prelude.h +++ b/src/prelude.h @@ -60,100 +60,31 @@ extern const char bfs_cflags[]; extern const char bfs_ldflags[]; extern const char bfs_ldlibs[]; -// Check for system headers +// Feature detection -#ifdef __has_include - -#if __has_include(<mntent.h>) -# define BFS_HAS_MNTENT_H true -#endif -#if __has_include(<paths.h>) -# define BFS_HAS_PATHS_H true -#endif -#if __has_include(<stdbit.h>) -# define BFS_HAS_STDBIT_H true -#endif -#if __has_include(<sys/extattr.h>) -# define BFS_HAS_SYS_EXTATTR_H true -#endif -#if __has_include(<sys/mkdev.h>) -# define BFS_HAS_SYS_MKDEV_H true -#endif -#if __has_include(<sys/param.h>) -# define BFS_HAS_SYS_PARAM_H true -#endif -#if __has_include(<sys/sysmacros.h>) -# define BFS_HAS_SYS_SYSMACROS_H true -#endif -#if __has_include(<sys/xattr.h>) -# define BFS_HAS_SYS_XATTR_H true -#endif -#if __has_include(<threads.h>) -# define BFS_HAS_THREADS_H true -#endif -#if __has_include(<util.h>) -# define BFS_HAS_UTIL_H true -#endif - -#else // !__has_include - -#define BFS_HAS_MNTENT_H __GLIBC__ -#define BFS_HAS_PATHS_H true -#define BFS_HAS_STDBIT_H (__STDC_VERSION__ >= C23) -#define BFS_HAS_SYS_EXTATTR_H __FreeBSD__ -#define BFS_HAS_SYS_MKDEV_H false -#define BFS_HAS_SYS_PARAM_H true -#define BFS_HAS_SYS_SYSMACROS_H __GLIBC__ -#define BFS_HAS_SYS_XATTR_H __linux__ -#define BFS_HAS_THREADS_H (!__STDC_NO_THREADS__) -#define BFS_HAS_UTIL_H __NetBSD__ - -#endif // !__has_include - -#ifndef BFS_USE_MNTENT_H -# define BFS_USE_MNTENT_H BFS_HAS_MNTENT_H -#endif -#ifndef BFS_USE_PATHS_H -# define BFS_USE_PATHS_H BFS_HAS_PATHS_H -#endif -#ifndef BFS_USE_SYS_EXTATTR_H -# define BFS_USE_SYS_EXTATTR_H BFS_HAS_SYS_EXTATTR_H -#endif -#ifndef BFS_USE_SYS_MKDEV_H -# define BFS_USE_SYS_MKDEV_H BFS_HAS_SYS_MKDEV_H -#endif -#ifndef BFS_USE_SYS_PARAM_H -# define BFS_USE_SYS_PARAM_H BFS_HAS_SYS_PARAM_H -#endif -#ifndef BFS_USE_SYS_SYSMACROS_H -# define BFS_USE_SYS_SYSMACROS_H BFS_HAS_SYS_SYSMACROS_H -#endif -#ifndef BFS_USE_SYS_XATTR_H -# define BFS_USE_SYS_XATTR_H BFS_HAS_SYS_XATTR_H -#endif -#ifndef BFS_USE_THREADS_H -# define BFS_USE_THREADS_H BFS_HAS_THREADS_H -#endif -#ifndef BFS_USE_UTIL_H -# define BFS_USE_UTIL_H BFS_HAS_UTIL_H +// https://clang.llvm.org/docs/LanguageExtensions.html#has-attribute +#ifndef __has_attribute +# define __has_attribute(attr) false #endif -// Stub out feature detection on old/incompatible compilers - -#ifndef __has_feature -# define __has_feature(feat) false +// https://clang.llvm.org/docs/LanguageExtensions.html#has-builtin +#ifndef __has_builtin +# define __has_builtin(builtin) false #endif +// https://en.cppreference.com/w/c/language/attributes#Attribute_testing #ifndef __has_c_attribute # define __has_c_attribute(attr) false #endif -#ifndef __has_attribute -# define __has_attribute(attr) false +// https://clang.llvm.org/docs/LanguageExtensions.html#has-feature-and-has-extension +#ifndef __has_feature +# define __has_feature(feat) false #endif -#ifndef __has_builtin -# define __has_builtin(builtin) false +// https://en.cppreference.com/w/c/preprocessor/include +#ifndef __has_include +# define __has_include(header) false #endif // Sanitizer macros (GCC defines these but Clang does not) |