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

madebr · Jun 24, 2024 · d52ea20 · d52ea20
1 parent ea11c9e
commit d52ea20
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Showing 3 changed files with 45 additions and 0 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -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)

diff --git a/cmake/PreseedMSVCCache.cmake b/cmake/PreseedMSVCCache.cmake
@@ -55,6 +55,12 @@ function(SDL_Preseed_CMakeCache)
  set(LIBC_HAS_ICONV_H "" CACHE INTERNAL "Have include iconv.h")
  set(LIBC_HAS_INDEX "" CACHE INTERNAL "Have symbol index")
  set(LIBC_HAS_INTTYPES_H "1" CACHE INTERNAL "Have include inttypes.h")
+ set(LIBC_HAS_ISINF "1" CACHE INTERNAL "Have include isinf(double)")
+ set(LIBC_ISINF_HANDLES_FLOAT "1" CACHE INTERNAL "Have include isinf(float)")
+ set(LIBC_HAS_ISINFF "" CACHE INTERNAL "Have include isinff(float)")
+ set(LIBC_HAS_ISNAN "1" CACHE INTERNAL "Have include isnan(double)")
+ set(LIBC_ISNAN_HANDLES_FLOAT "1" CACHE INTERNAL "Have include isnan(float)")
+ set(LIBC_HAS_ISNANF "" CACHE INTERNAL "Have include isnanf(float)")
  set(LIBC_HAS_ITOA "1" CACHE INTERNAL "Have symbol itoa")
  set(LIBC_HAS_LIMITS_H "1" CACHE INTERNAL "Have include limits.h")
  set(LIBC_HAS_LOG "1" CACHE INTERNAL "Have symbol log")

diff --git a/include/build_config/SDL_build_config.h.cmake b/include/build_config/SDL_build_config.h.cmake
@@ -154,8 +154,10 @@
 #cmakedefine HAVE_FMODF 1
 #cmakedefine HAVE_ISINF 1
 #cmakedefine HAVE_ISINFF 1
+#cmakedefine HAVE_ISINF_FLOAT_MACRO 1
 #cmakedefine HAVE_ISNAN 1
 #cmakedefine HAVE_ISNANF 1
+#cmakedefine HAVE_ISNAN_FLOAT_MACRO 1
 #cmakedefine HAVE_LOG 1
 #cmakedefine HAVE_LOGF 1
 #cmakedefine HAVE_LOG10 1