Modules: Make missing headers in a module.map a warning not an error.

Instead, mark the module as unavailable so that clang errors as soon as
someone tries to build this module.

A better long-term strategy might be to not stat the header files at all
while reading the module map and instead read them only when the module
is being built (there is a corresponding FIXME in parseHeaderDecl()).
However, it seems non-trivial to get there and this would be a temporary
solution to unblock us.

Also changed the implementation to reuse the same DiagnosticsEngine as
otherwise warnings can't be enabled or disabled with command-line flags.

llvm-svn: 197388

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index 5770aaa..254c029 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -48,7 +48,7 @@ HeaderSearch::HeaderSearch(IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
                            const LangOptions &LangOpts, 
                            const TargetInfo *Target)
   : HSOpts(HSOpts), FileMgr(SourceMgr.getFileManager()), FrameworkMap(64),
-    ModMap(SourceMgr, *Diags.getClient(), LangOpts, Target, *this)
+    ModMap(SourceMgr, Diags, LangOpts, Target, *this)
 {
   AngledDirIdx = 0;
   SystemDirIdx = 0;