From: kgv <kgv@opencascade.com>
Date: Mon, 23 Jul 2018 16:13:29 +0000 (+0300)
Subject: 0029980: Configuration, CMake - impossible to override CMAKE_CXX_USE_RESPONSE_FILE_FO... 
X-Git-Tag: OCCT_VC2017_73~46
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=27a4b067ff43710964f4b7e1e816d9a6adaddd8f;p=occt.git

0029980: Configuration, CMake - impossible to override CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS

Variables are not assigning only if have not been previously defined.
---

diff --git a/adm/cmake/occt_defs_flags.cmake b/adm/cmake/occt_defs_flags.cmake
index 09da18d382..c722d1482a 100644
--- a/adm/cmake/occt_defs_flags.cmake
+++ b/adm/cmake/occt_defs_flags.cmake
@@ -86,8 +86,13 @@ if (MSVC AND (MSVC_VERSION GREATER 1400))
 endif()
 
 # generate a single response file which enlist all of the object files
-SET(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)
-SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+if (NOT DEFINED CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS)
+  SET(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+endif()
+if (NOT DEFINED CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS)
+  SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+endif()
+
 # increase compiler warnings level (-W4 for MSVC, -Wextra for GCC)
 if (MSVC)
   if (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")