Sync cache variable names for -fwrapv flag check

Author: petk

cmake/cmake/platforms/Windows.cmake

@@ -197,6 +197,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
   set(HAVE_VASPRINTF FALSE)
   set(HAVE_WMMINTRIN_H TRUE)
   set(HAVE_WS2TCPIP_H TRUE)
+  set(PHP_EXT_DATE_HAS_FWRAP FALSE)
   set(PHP_EXT_GD_HAS_FLOORF TRUE)
   set(PHP_EXT_OPCACHE_HAS_FLOOR TRUE)
   set(PHP_HAS_CREATEPROCESS TRUE)

cmake/ext/date/lib/CMakeLists.txt

@@ -82,8 +82,8 @@ target_compile_definitions(
     HAVE_STRTOLL
 )
 
-check_compiler_flag(C -fwrapv _timelib_HAVE_FWRAPV)
-if(_timelib_HAVE_FWRAPV)
+check_compiler_flag(C -fwrapv PHP_EXT_DATE_HAS_FWRAP)
+if(PHP_EXT_DATE_HAS_FWRAP)
   set_source_files_properties(
     ${timelibSources}
     TARGET_DIRECTORY ${TIMELIB_TARGET}