[libc++] Guard include of <features.h> with __has_include (#127691) · llvm/llvm-project@d420bf8 (original) (raw)
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- libcxx/include/__configuration
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| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
| @@ -32,12 +32,14 @@ | |||
| 32 | 32 | ||
| 33 | 33 | // Need to detect which libc we're using if we're on Linux. | |
| 34 | 34 | #if defined(__linux__) | | defined(__AMDGPU__) |
| 35 | -# include <features.h> | ||
| 36 | -# if defined(__GLIBC_PREREQ) | ||
| 37 | -# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) | ||
| 38 | -# else | ||
| 39 | -# define _LIBCPP_GLIBC_PREREQ(a, b) 0 | ||
| 40 | -# endif // defined(__GLIBC_PREREQ) | ||
| 35 | +# if __has_include(<features.h>) | ||
| 36 | +# include <features.h> | ||
| 37 | +# if defined(__GLIBC_PREREQ) | ||
| 38 | +# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) | ||
| 39 | +# else | ||
| 40 | +# define _LIBCPP_GLIBC_PREREQ(a, b) 0 | ||
| 41 | +# endif // defined(__GLIBC_PREREQ) | ||
| 42 | +# endif | ||
| 41 | 43 | #endif | |
| 42 | 44 | ||
| 43 | 45 | #ifndef __BYTE_ORDER__ |