55 lines
1.6 KiB
CMake
55 lines
1.6 KiB
CMake
# Module that checks whether the compiler supports the
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# quadruple precision floating point math
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#
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# Sets the following variables:
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# HAVE_QUAD
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# QUADMATH_LIBRARIES
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#
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# perform tests
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include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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include(CMakePushCheckState)
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include(CheckCXXCompilerFlag)
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if(NOT DEFINED USE_QUADMATH OR USE_QUADMATH)
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if(NOT DEFINED HAVE_EXTENDED_NUMERIC_LITERALS)
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check_cxx_compiler_flag("-Werror -fext-numeric-literals" HAVE_EXTENDED_NUMERIC_LITERALS)
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endif()
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if (HAVE_EXTENDED_NUMERIC_LITERALS)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fext-numeric-literals")
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endif()
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cmake_push_check_state(RESET)
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list(APPEND CMAKE_REQUIRED_LIBRARIES "quadmath")
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CHECK_CXX_SOURCE_COMPILES("
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#include <quadmath.h>
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int main(void){
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__float128 foo = sqrtq(123.456);
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foo = FLT128_MIN;
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}" QUADMATH_FOUND)
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cmake_pop_check_state()
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if (QUADMATH_FOUND AND NOT TARGET QuadMath::QuadMath)
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set(QUADMATH_LIBRARIES "quadmath")
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set(HAVE_QUAD "${QUADMATH_FOUND}")
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add_library(QuadMath::QuadMath INTERFACE IMPORTED)
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set_target_properties(QuadMath::QuadMath PROPERTIES
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INTERFACE_LINK_LIBRARIES quadmath
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INTERFACE_COMPILE_DEFINITIONS _GLIBCXX_USE_FLOAT128
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INTERFACE_COMPILE_OPTIONS $<$<CXX_COMPILER_ID:GNU>:-fext-numeric-literals>)
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endif()
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endif()
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if (USE_QUADMATH AND NOT QUADMATH_FOUND)
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message(FATAL_ERROR "Quadruple precision math support was explicitly requested but is unavailable!")
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Quadmath
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DEFAULT_MSG
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QUADMATH_LIBRARIES
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QUADMATH_FOUND
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)
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