From db607dea8dbb0d16e75e5ae1e764002e4ce8e605 Mon Sep 17 00:00:00 2001
From: Peter Kuemmel <syntheticpp@gmx.net>
Date: Sat, 9 Jun 2012 13:52:20 +0200
Subject: Ninja: don't use cmcldeps for try_compile

---
 Source/cmNinjaTargetGenerator.cxx | 16 ++++++++++++++--
 Source/cmcldeps.cxx               | 12 ++++++++----
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index 75b3929..40fdc8b 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -331,13 +331,25 @@ cmNinjaTargetGenerator
   vars.TargetPDB = "$TARGET_PDB";
 
   cmMakefile* mf = this->GetMakefile();
+  bool useClDeps = false;
   const char* clDepsBinary = mf->GetDefinition("CMAKE_CMCLDEPS_EXECUTABLE");
   const char* clShowPrefix = mf->GetDefinition("CMAKE_CL_SHOWINCLUDE_PREFIX");
+  const char* projectName  = mf->GetProjectName();
+  if (clDepsBinary && clShowPrefix)
+    {
+    useClDeps = true;
+    if (projectName && std::string(projectName) == "CMAKE_TRY_COMPILE")
+      {
+      // don't wrap for try_compile, TODO but why doesn't it work with cmcldeps?
+      useClDeps = false;
+      }
+    }
+
 
   std::string depfile;
   std::string depfileFlagsName = "CMAKE_DEPFILE_FLAGS_" + language;
   const char *depfileFlags = mf->GetDefinition(depfileFlagsName.c_str());
-  if (depfileFlags || (clDepsBinary && clShowPrefix)) {
+  if (depfileFlags || useClDeps) {
     std::string depfileFlagsStr = depfileFlags ? depfileFlags : "";
     depfile = "$out.d";
     cmSystemTools::ReplaceString(depfileFlagsStr, "<DEPFILE>",
@@ -366,7 +378,7 @@ cmNinjaTargetGenerator
   std::string cmdLine =
     this->GetLocalGenerator()->BuildCommandLine(compileCmds);
 
-  if(clDepsBinary && clShowPrefix)
+  if(useClDeps)
     {
     std::string prefix = clShowPrefix;
     cmdLine = "\"" + std::string(clDepsBinary) + "\" $in $out.d $out \"" + prefix + "\" " + cmdLine;
diff --git a/Source/cmcldeps.cxx b/Source/cmcldeps.cxx
index 48f2cfd..d6cafc5 100644
--- a/Source/cmcldeps.cxx
+++ b/Source/cmcldeps.cxx
@@ -52,6 +52,8 @@ struct Subprocess {
 
   const string& GetOutput() const;
 
+  int ExitCode() const { return exit_code_; }
+
  private:
   Subprocess();
   bool Start(struct SubprocessSet* set, const string& command);
@@ -69,6 +71,7 @@ struct Subprocess {
   OVERLAPPED overlapped_;
   char overlapped_buf_[4 << 10];
   bool is_reading_;
+  int exit_code_;
 #else
   int fd_;
   pid_t pid_;
@@ -189,7 +192,7 @@ void Win32Fatal(const char* function) {
 
 }  // anonymous namespace
 
-Subprocess::Subprocess() : child_(NULL) , overlapped_(), is_reading_(false) {
+Subprocess::Subprocess() : child_(NULL) , overlapped_(), is_reading_(false), exit_code_(1) {
 }
 
 Subprocess::~Subprocess() {
@@ -338,7 +341,7 @@ ExitStatus Subprocess::Finish() {
 
   CloseHandle(child_);
   child_ = NULL;
-
+  exit_code_ = exit_code;
   return exit_code == 0              ? ExitSuccess :
          exit_code == CONTROL_C_EXIT ? ExitInterrupted :
                                        ExitFailure;
@@ -606,8 +609,9 @@ int main() {
   }
 
   bool success = subproc->Finish() == ExitSuccess;
-  string output = subproc->GetOutput();
+  int exit_code = subproc->ExitCode();
 
+  string output = subproc->GetOutput();
   delete subproc;
 
   // process the include directives and output everything else
@@ -635,7 +639,7 @@ int main() {
   }
 
   if (!success)
-    return 3;
+    return exit_code;
 
   // don't update .d until/unless we succeed compilation
   outputDepFile(dfile, objfile, includes);
-- 
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