For modules, use a hash of the compiler version, language options, and

target triple to separate modules built under different
conditions. The hash is used to create a subdirectory in the module
cache path where other invocations of the compiler (with the same
version, language options, etc.) can find the precompiled modules.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139662 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/include/clang/Frontend/HeaderSearchOptions.h b/include/clang/Frontend/HeaderSearchOptions.h
index a81a0cb992..e0f80e3bdf 100644
--- a/include/clang/Frontend/HeaderSearchOptions.h
+++ b/include/clang/Frontend/HeaderSearchOptions.h
@@ -78,6 +78,12 @@ public:
   /// \brief The directory used for the module cache.
   std::string ModuleCachePath;
   
+  /// \brief Whether we should disable the use of the hash string within the
+  /// module cache.
+  ///
+  /// Note: Only used for testing!
+  unsigned DisableModuleHash : 1;
+  
   /// Include the compiler builtin includes.
   unsigned UseBuiltinIncludes : 1;
 
@@ -95,7 +101,7 @@ public:
 
 public:
   HeaderSearchOptions(StringRef _Sysroot = "/")
-    : Sysroot(_Sysroot), UseBuiltinIncludes(true),
+    : Sysroot(_Sysroot), DisableModuleHash(0), UseBuiltinIncludes(true),
       UseStandardIncludes(true), UseStandardCXXIncludes(true), UseLibcxx(false),
       Verbose(false) {}