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
diff --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index 77ced23..bf266b3 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -121,11 +121,29 @@
std::string HeaderSearch::getModuleFileName(Module *Module) {
const FileEntry *ModuleMap =
getModuleMap().getModuleMapFileForUniquing(Module);
- return getModuleFileName(Module->Name, ModuleMap->getName());
+ return getModuleFileName(Module->Name, ModuleMap->getName(),
+ /*UsePrebuiltPath*/false);
}
std::string HeaderSearch::getModuleFileName(StringRef ModuleName,
- StringRef ModuleMapPath) {
+ StringRef ModuleMapPath,
+ bool UsePrebuiltPath) {
+ if (UsePrebuiltPath) {
+ if (HSOpts->PrebuiltModulePaths.empty())
+ return std::string();
+
+ // Go though each prebuilt module path and try to find the pcm file.
+ for (const std::string &Dir : HSOpts->PrebuiltModulePaths) {
+ SmallString<256> Result(Dir);
+ llvm::sys::fs::make_absolute(Result);
+
+ llvm::sys::path::append(Result, ModuleName + ".pcm");
+ if (getFileMgr().getFile(Result.str()))
+ return Result.str().str();
+ }
+ return std::string();
+ }
+
// If we don't have a module cache path or aren't supposed to use one, we
// can't do anything.
if (getModuleCachePath().empty())