diff options
Diffstat (limited to 'lib/count-trailing-zeros.h')
| -rw-r--r-- | lib/count-trailing-zeros.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/count-trailing-zeros.h b/lib/count-trailing-zeros.h index 8de0f5b5469..5a8ef563ea2 100644 --- a/lib/count-trailing-zeros.h +++ b/lib/count-trailing-zeros.h @@ -30,11 +30,16 @@ _GL_INLINE_HEADER_BEGIN # define COUNT_TRAILING_ZEROS_INLINE _GL_INLINE #endif +#ifdef __cplusplus +extern "C" { +#endif + /* Assuming the GCC builtin is BUILTIN and the MSC builtin is MSC_BUILTIN, expand to code that computes the number of trailing zeros of the local variable 'x' of type TYPE (an unsigned integer type) and return it from the current function. */ -#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) \ + || (__clang_major__ >= 4) # define COUNT_TRAILING_ZEROS(BUILTIN, MSC_BUILTIN, TYPE) \ return x ? BUILTIN (x) : CHAR_BIT * sizeof x; #elif _MSC_VER @@ -92,7 +97,6 @@ count_trailing_zeros_l (unsigned long int x) COUNT_TRAILING_ZEROS (__builtin_ctzl, _BitScanForward, unsigned long int); } -#if HAVE_UNSIGNED_LONG_LONG_INT /* Compute and return the number of trailing zeros in X. */ COUNT_TRAILING_ZEROS_INLINE int count_trailing_zeros_ll (unsigned long long int x) @@ -100,6 +104,9 @@ count_trailing_zeros_ll (unsigned long long int x) COUNT_TRAILING_ZEROS (__builtin_ctzll, _BitScanForward64, unsigned long long int); } + +#ifdef __cplusplus +} #endif _GL_INLINE_HEADER_END |