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cmake: check for valid isinf/isinff/isnan/isnanf macros

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Anonymous Maarten
2024-06-24 21:47:19 +02:00
parent ea11c9e0c7
commit d52ea20916
3 changed files with 45 additions and 0 deletions
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37
CMakeLists.txt
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@@ -1100,6 +1100,43 @@ if(SDL_LIBC)
endforeach()
cmake_pop_check_state()
cmake_push_check_state()
if(MSVC)
string(APPEND CMAKE_REQUIRED_FLAGS " -we4244 -WX") # 'conversion' conversion from 'type1' to 'type2', possible loss of data
else()
string(APPEND CMAKE_REQUIRED_FLAGS " -Wfloat-conversion -Werror")
endif()
foreach(math_fn isinf isnan)
string(TOUPPER "${math_fn}" MATH_FN)
check_c_source_compiles("
#include <math.h>
int main() {
double d = 3.14159;
return ${math_fn}(d);
}
" LIBC_HAS_${MATH_FN})
set(HAVE_${MATH_FN} ${LIBC_HAS_${MATH_FN}})
check_c_source_compiles("
#include <math.h>
int main() {
float f = 3.14159f;
return ${math_fn}(f);
}
" LIBC_${MATH_FN}_HANDLES_FLOAT)
set(HAVE_${MATH_FN}_FLOAT_MACRO ${LIBC_${MATH_FN}_HANDLES_FLOAT})
check_c_source_compiles("
#include <math.h>
int main() {
float f = 3.14159f;
return ${math_fn}f(f);
}
" LIBC_HAS_${MATH_FN}F)
set(HAVE_${MATH_FN}F "${LIBC_HAS_${MATH_FN}}")
endforeach()
cmake_pop_check_state()
if(NOT WINDOWS)
check_symbol_exists(getpagesize "unistd.h" HAVE_GETPAGESIZE)
check_symbol_exists(sigaction "signal.h" HAVE_SIGACTION)