diff options
Diffstat (limited to 'config/cmake/ConfigureChecks.cmake')
| -rw-r--r-- | config/cmake/ConfigureChecks.cmake | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake index 9ccb7a4..14e8b75 100644 --- a/config/cmake/ConfigureChecks.cmake +++ b/config/cmake/ConfigureChecks.cmake @@ -367,7 +367,30 @@ HDF_CHECK_TYPE_SIZE (time_t ${HDF_PREFIX}_SIZEOF_TIME_T) #----------------------------------------------------------------------------- HDF_CHECK_TYPE_SIZE (_Float16 ${HDF_PREFIX}_SIZEOF__FLOAT16) if (${HDF_PREFIX}_SIZEOF__FLOAT16) - set (${HDF_PREFIX}_HAVE__FLOAT16 1) + # Ask for _Float16 support + set (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} "-D__STDC_WANT_IEC_60559_TYPES_EXT__") + + # Some compilers expose the _Float16 datatype, but not the macros and + # functions used with the datatype. We need the macros for proper + # datatype conversion support. The main function we're interested in + # is fabsf16. Check for these here. + CHECK_SYMBOL_EXISTS (FLT16_EPSILON "float.h" h5_have_flt16_epsilon) + CHECK_SYMBOL_EXISTS (FLT16_MIN "float.h" h5_have_flt16_min) + CHECK_SYMBOL_EXISTS (FLT16_MAX "float.h" h5_have_flt16_max) + CHECK_SYMBOL_EXISTS (FLT16_MIN_10_EXP "float.h" h5_have_flt16_min_10_exp) + CHECK_SYMBOL_EXISTS (FLT16_MAX_10_EXP "float.h" h5_have_flt16_max_10_exp) + CHECK_SYMBOL_EXISTS (FLT16_MANT_DIG "float.h" h5_have_flt16_mant_dig) + + if (h5_have_flt16_epsilon AND h5_have_flt16_min AND + h5_have_flt16_max AND h5_have_flt16_min_10_exp AND + h5_have_flt16_max_10_exp AND h5_have_flt16_mant_dig) + set (${HDF_PREFIX}_HAVE__FLOAT16 1) + + # Check if we can use fabsf16 + CHECK_FUNCTION_EXISTS (fabsf16 ${HDF_PREFIX}_HAVE_FABSF16) + else () + set (${HDF_PREFIX}_HAVE__FLOAT16 0) + endif () else () set (${HDF_PREFIX}_HAVE__FLOAT16 0) endif () |