check_function_exists (isnan HAVE_ISNAN)

CHECK_SYMBOL_EXISTS(isnan math.h HAVE_ISNAN)

check_symbol_exists (isnan math.h HAVE_ISNAN)

check_function_exists(isnan HAVE_ISNAN)

check_function_exists (isnan HAVE_ISNAN)

CHECK_SYMBOL_EXISTS(isnan math.h HAVE_ISNAN)

check_cxx_symbol_exists ("isnan" "cmath" HAVE_ISNAN)

check_function_exists (isnan HAVE_ISNAN)

CHECK_SYMBOL_EXISTS(isnan math.h HAVE_ISNAN)

CHECK_FUNCTION_EXISTS("isnan" HAVE_ISNAN)

check_symbol_exists (isnan       "${_math_h}" HAVE_ISNAN)

check_cxx_source_compiles("int test = std::isnan(0.0)" HAVE_ISNAN)

CHECK_SYMBOL_EXISTS(isnan math.h HAVE_ISNAN)

list( APPEND DEFINES
   PRIVATE
      #
      # We need the dbpage table for space calculations.
      #
      SQLITE_ENABLE_DBPAGE_VTAB=1

      # Can't be set after a WAL mode database is initialized, so change
      # the default here to ensure all project files get the same page 
      # size.
      SQLITE_DEFAULT_PAGE_SIZE=65536

      #
      # Recommended in SQLite docs
      #
      SQLITE_DQS=0
      SQLITE_DEFAULT_MEMSTATUS=0
      SQLITE_DEFAULT_SYNCHRONOUS=1
      SQLITE_DEFAULT_WAL_SYNCHRONOUS=1
      SQLITE_LIKE_DOESNT_MATCH_BLOBS
      SQLITE_MAX_EXPR_DEPTH=0
      SQLITE_OMIT_DEPRECATED
      SQLITE_OMIT_SHARED_CACHE
      SQLITE_USE_ALLOCA
      SQLITE_OMIT_AUTOINIT
      $<$<BOOL:${HAVE_FDATASYNC}>:HAVE_FDATASYNC>
      $<$<BOOL:${HAVE_GMTIME_R}>:HAVE_GMTIME_R>
      $<$<BOOL:${HAVE_ISNAN}>:HAVE_ISNAN>
      $<$<BOOL:${HAVE_LOCALTIME_R}>:HAVE_LOCALTIME_R>
      $<$<BOOL:${HAVE_LOCALTIME_S}>:HAVE_LOCALTIME_S>
)

CHECK_CXX_SOURCE_COMPILES("#include <math.h> 
int main() {isnan(0); return 1;}" HAVE_ISNAN)