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| author | Brad King <brad.king@kitware.com> | 2015-10-23 14:24:47 (GMT) |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2015-10-28 12:44:47 (GMT) |
| commit | 43d577dcb9e29842c91073056ca400963d6bee0e (patch) | |
| tree | 0f710af0424ad8dda6657da141a7884e4a1447a0 /Utilities | |
| parent | 85e0bb84f5eca2f77f070bce9f83024854096307 (diff) | |
| download | CMake-43d577dcb9e29842c91073056ca400963d6bee0e.zip CMake-43d577dcb9e29842c91073056ca400963d6bee0e.tar.gz CMake-43d577dcb9e29842c91073056ca400963d6bee0e.tar.bz2 | |
libarchive: Test for Clang builtin before using it
The __builtin_bswap16 builtin is not available on Clang 2.1.
Diffstat (limited to 'Utilities')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_lha.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_lha.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_lha.c index c359d83..eff02d8 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_lha.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_lha.c @@ -1712,10 +1712,13 @@ lha_crc16(uint16_t crc, const void *pp, size_t len) for (;len >= 8; len -= 8) { /* This if statement expects compiler optimization will * remove the stament which will not be executed. */ +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif #if defined(_MSC_VER) && _MSC_VER >= 1400 /* Visual Studio */ # define bswap16(x) _byteswap_ushort(x) #elif (defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 8) \ - || defined(__clang__) + || (defined(__clang__) && __has_builtin(__builtin_bswap16)) # define bswap16(x) __builtin_bswap16(x) #else # define bswap16(x) ((((x) >> 8) & 0xff) | ((x) << 8)) |