From b482f23c6bb4e12f1fd9638a2187799dc00619b0 Mon Sep 17 00:00:00 2001
From: Mikhail Glushenkov <foldr@codedgers.com>
Date: Tue, 27 Jul 2010 11:19:40 +0000
Subject: Fix silent failure with no input files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109500 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CompilerDriver/CompilationGraph.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/CompilerDriver/CompilationGraph.cpp')

diff --git a/lib/CompilerDriver/CompilationGraph.cpp b/lib/CompilerDriver/CompilationGraph.cpp
index 9ea69c129f..259911f713 100644
--- a/lib/CompilerDriver/CompilationGraph.cpp
+++ b/lib/CompilerDriver/CompilationGraph.cpp
@@ -355,6 +355,7 @@ TopologicalSortFilterJoinNodes(std::vector<const Node*>& Out) {
 int CompilationGraph::Build (const sys::Path& TempDir,
                              const LanguageMap& LangMap) {
   InputLanguagesSet InLangs;
+  bool WasSomeActionGenerated = !InputFilenames.empty();
 
   // Traverse initial parts of the toolchains and fill in InLangs.
   if (int ret = BuildInitial(InLangs, TempDir, LangMap))
@@ -375,6 +376,7 @@ int CompilationGraph::Build (const sys::Path& TempDir,
     if (JT->JoinListEmpty() && !(JT->WorksOnEmpty() && InputFilenames.empty()))
       continue;
 
+    WasSomeActionGenerated = true;
     Action CurAction;
     if (int ret = JT->GenerateAction(CurAction, CurNode->HasChildren(),
                                      TempDir, InLangs, LangMap)) {
@@ -401,6 +403,11 @@ int CompilationGraph::Build (const sys::Path& TempDir,
     }
   }
 
+  if (!WasSomeActionGenerated) {
+    PrintError("no input files");
+    return 1;
+  }
+
   return 0;
 }
 
-- 
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