Simplify gid_t/uid_t cache variables

Instead of defining cache variable with unreliable name, this sets
regular CMake variable with code for the configuration header for
gid_t/uid_t on POSIX systems (although this could be even further
improved in modern code by only checking for Windows target system
directly in the C code).

Author: petk

cmake/cmake/ConfigureChecks.cmake

@@ -276,12 +276,9 @@ cmake_pop_check_state()
 
 check_type_size("gid_t" SIZEOF_GID_T)
 if(NOT HAVE_SIZEOF_GID_T)
-  set(
-    gid_t
-    int
-    CACHE INTERNAL
-    "Define as 'int' if not defined in <sys/types.h>."
-  )
+  set(PHP_GID_T_CODE "#define gid_t int")
+else()
+  set(PHP_GID_T_CODE "/* #undef gid_t */")
 endif()
 
 check_type_size("int" SIZEOF_INT)
@@ -335,12 +332,9 @@ endif()
 
 check_type_size("uid_t" SIZEOF_UID_T)
 if(NOT HAVE_SIZEOF_UID_T)
-  set(
-    uid_t
-    int
-    CACHE INTERNAL
-    "Define as 'int' if not defined in <sys/types.h>."
-  )
+  set(PHP_UID_T_CODE "#define uid_t int")
+else()
+  set(PHP_UID_T_CODE "/* #undef uid_t */")
 endif()
 
 # Check for socklen_t type.

cmake/main/cmake/php_config.h.in

@@ -681,10 +681,10 @@
 # endif
 #else
 /* Define to 'int' if <sys/types.h> doesn't define. */
-# cmakedefine gid_t @gid_t@
+@PHP_GID_T_CODE@
 
 /* Define to 'int' if <sys/types.h> doesn't define. */
-# cmakedefine uid_t @uid_t@
+@PHP_UID_T_CODE@
 
 # include <stdlib.h>