2021-12-08 11:32:04 +00:00
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# 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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# QUADMATH_FOUND
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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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2021-12-09 14:13:19 +00:00
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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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2021-12-08 11:32:04 +00:00
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2021-12-09 14:13:19 +00:00
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# if (HAVE_EXTENDED_NUMERIC_LITERALS)
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# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fext-numeric-literals")
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# endif()
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2021-12-08 11:32:04 +00:00
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cmake_push_check_state(RESET)
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list(APPEND CMAKE_REQUIRED_LIBRARIES "quadmath")
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CHECK_CXX_SOURCE_COMPILES("
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#include <quadmath.h>
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int main(void){
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__float128 foo = sqrtq(123.456);
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foo = FLT128_MIN;
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}" QUADMATH_FOUND)
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cmake_pop_check_state()
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if (QUADMATH_FOUND)
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set(QUADMATH_LIBRARIES "quadmath")
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set(QUADMATH_FOUND "${QUADMATH_FOUND}")
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set(HAVE_QUADMATH 1)
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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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