Module: add -fprebuilt-module-path to support loading prebuilt modules.

In this mode, there is no need to load any module map and the programmer can
simply use "@import" syntax to load the module directly from a prebuilt
module path. When loading from prebuilt module path, we don't support
rebuilding of the module files and we ignore compatible configuration
mismatches.

rdar://27290316
Differential Revision: http://reviews.llvm.org/D23125

llvm-svn: 279096

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 12d5eabafa1..a814df3c64c 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -5405,6 +5405,13 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(Args.MakeArgString(Path));
   }
 
+  if (HaveModules) {
+    // -fprebuilt-module-path specifies where to load the prebuilt module files.
+    for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path))
+      CmdArgs.push_back(Args.MakeArgString(
+          std::string("-fprebuilt-module-path=") + A->getValue()));
+  }
+      
   // -fmodule-name specifies the module that is currently being built (or
   // used for header checking by -fmodule-maps).
   Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ);