[PATCH] D21827: [CMake] Make -fmodules-local-submodule-visibility optional.

[Adrian Prantl via llvm-commits]

aprantl updated this revision to Diff 62285.
aprantl added a comment.

Update patch according to beanz' suggestion. Much cleaner.

thanks!


http://reviews.llvm.org/D21827

Files:
  CMakeLists.txt
  cmake/modules/HandleLLVMOptions.cmake

Index: cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- cmake/modules/HandleLLVMOptions.cmake
+++ cmake/modules/HandleLLVMOptions.cmake
@@ -465,7 +465,16 @@
   endif()
   if (LLVM_ENABLE_MODULES)
     set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fmodules -Xclang -fmodules-local-submodule-visibility -fmodules-cache-path=module.cache")
+    set(module_flags "-fmodules -Xclang -fmodules-cache-path=module.cache")
+    if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+      # On Darwin -fmodules does not imply -fcxx-modules.
+      set(module_flags "${module_flags} -fcxx-modules")
+    endif()
+    if (LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY)
+      set(module_flags "${module_flags} -fmodules-local-submodule-visibility")
+    endif()
+    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${module_flags}")
+
     # Check that we can build code with modules enabled, and that repeatedly
     # including <cassert> still manages to respect NDEBUG properly.
     CHECK_CXX_SOURCE_COMPILES("#undef NDEBUG
@@ -476,7 +485,7 @@
                                CXX_SUPPORTS_MODULES)
     set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
     if (CXX_SUPPORTS_MODULES)
-      append_if(CXX_SUPPORTS_MODULES "-fmodules -Xclang -fmodules-local-submodule-visibility -fmodules-cache-path=module.cache" CMAKE_CXX_FLAGS)
+      append("${module_flags}" CMAKE_CXX_FLAGS)
     else()
       message(FATAL_ERROR "LLVM_ENABLE_MODULES is not supported by this compiler")
     endif()
Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -283,6 +283,11 @@
 option(LLVM_ENABLE_PIC "Build Position-Independent Code" ON)
 option(LLVM_ENABLE_WARNINGS "Enable compiler warnings." ON)
 option(LLVM_ENABLE_MODULES "Compile with C++ modules enabled." OFF)
+if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  option(LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY "Compile with -fmodules-local-submodule-visibility." OFF)
+else()
+  option(LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY "Compile with -fmodules-local-submodule-visibility." ON)
+endif()
 option(LLVM_ENABLE_CXX1Y "Compile with C++1y enabled." OFF)
 option(LLVM_ENABLE_LIBCXX "Use libc++ if available." OFF)
 option(LLVM_ENABLE_LIBCXXABI "Use libc++abi when using libc++." OFF)


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D21827.62285.patch
Type: text/x-patch
Size: 2398 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20160629/c6a34d5e/attachment.bin>