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https://github.com/Unidata/netcdf-c.git
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56 lines
1.6 KiB
CMake
56 lines
1.6 KiB
CMake
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# Work out which HDF5 config header we can safely include
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#
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# We'd like to just use H5public.h, but if HDF5 was built against MPI, this
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# might require us to have found MPI already. The next best file is H5pubconf.h,
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# which actually has all the feature macros we want to check, but some
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# distributions rename this for multiarch, so we've got to check some different
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# names.
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#
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# HDF5_INCLUDE_DIR should already be set before calling this
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function(check_hdf5_feature_header)
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if (_H5_FEATURE_HEADER)
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return()
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endif()
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include(CheckIncludeFile)
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set(CMAKE_REQUIRED_INCLUDES ${HDF5_INCLUDE_DIR})
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message(STATUS "Checking for HDF5 config header")
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foreach(_h5_header "H5public.h" "H5pubconf.h" "H5pubconf-64.h" "H5pubconf-32.h")
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check_include_file(${_h5_header} _can_include_h5_header)
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if (_can_include_h5_header)
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message(STATUS "Using ${_h5_header} to check for feature macros")
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set(_H5_FEATURE_HEADER ${_h5_header} CACHE INTERNAL "")
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return()
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endif()
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endforeach()
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message(FATAL_ERROR "Could not include any HDF5 config headers")
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endfunction()
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# Check for an HDF5 feature macro named FEATURE and store the result in VAR
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#
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# This just wraps `check_c_source_compiles` but ensures we use the correct header
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function(check_hdf5_feature VAR FEATURE)
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if (NOT _H5_FEATURE_HEADER)
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check_hdf5_feature_header()
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endif()
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include(CheckCSourceCompiles)
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set(CMAKE_REQUIRED_INCLUDES ${HDF5_INCLUDE_DIR})
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message(STATUS "Checking for ${FEATURE}")
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check_c_source_compiles("
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#include <${_H5_FEATURE_HEADER}>
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#if !${FEATURE}
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#error
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#endif
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int main() {}"
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_has_${FEATURE})
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set(${VAR} ${_has_${FEATURE}} PARENT_SCOPE)
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endfunction()
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