Add '-include-pch' option to the driver, so it can get passed to the cc1 driver.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116605 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 229cf608f3..fd57cffbc5 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -256,6 +256,16 @@ void Clang::AddPreprocessingOptions(const Driver &D,
       if (FoundPCH || FoundPTH) {
         if (IsFirstImplicitInclude) {
           A->claim();
+          if (P.isDirectory()) {
+            // Expect to find a precompiled header matching the current input type
+            P.appendComponent(types::getTypeName(Inputs[0].getType()));
+            if (!P.exists()) {
+              D.Diag(clang::diag::warn_drv_pch_missing_language)
+                  << A->getAsString(Args) << P.str()
+                  << types::getTypeName(Inputs[0].getType());
+              continue;
+            }
+          }
           if (UsePCH)
             CmdArgs.push_back("-include-pch");
           else