Propagate supbrocess' exit codes to the ninja exit code

src/build.h

@@ -155,7 +155,7 @@ struct CommandRunner {
   struct Result {
     Result() : edge(NULL) {}
     Edge* edge;
-    ExitStatus status;
+    int status;
     std::string output;
     bool success() const { return status == ExitSuccess; }
   };

src/subprocess-posix.cc

@@ -147,7 +147,7 @@ void Subprocess::OnPipeReady() {
   }
 }
 
-ExitStatus Subprocess::Finish() {
+int Subprocess::Finish() {
   assert(pid_ != -1);
   int status;
   if (waitpid(pid_, &status, 0) < 0)
@@ -164,16 +164,17 @@ ExitStatus Subprocess::Finish() {
   }
 #endif
 
+  int exit = 0;
   if (WIFEXITED(status)) {
-    int exit = WEXITSTATUS(status);
+    exit = WEXITSTATUS(status);
     if (exit == 0)
       return ExitSuccess;
   } else if (WIFSIGNALED(status)) {
     if (WTERMSIG(status) == SIGINT || WTERMSIG(status) == SIGTERM
         || WTERMSIG(status) == SIGHUP)
       return ExitInterrupted;
   }
-  return ExitFailure;
+  return exit;
 }
 
 bool Subprocess::Done() const {

src/subprocess-win32.cc

@@ -185,22 +185,21 @@ void Subprocess::OnPipeReady() {
   // function again later and get them at that point.
 }
 
-ExitStatus Subprocess::Finish() {
+int Subprocess::Finish() {
   if (!child_)
     return ExitFailure;
 
   // TODO: add error handling for all of these.
   WaitForSingleObject(child_, INFINITE);
 
-  DWORD exit_code = 0;
+  int exit_code = 0;
   GetExitCodeProcess(child_, &exit_code);
 
   CloseHandle(child_);
   child_ = NULL;
 
-  return exit_code == 0              ? ExitSuccess :
-         exit_code == CONTROL_C_EXIT ? ExitInterrupted :
-                                       ExitFailure;
+  return exit_code == CONTROL_C_EXIT ? ExitInterrupted :
+                                       exit_code;
 }
 
 bool Subprocess::Done() const {

src/subprocess.h

@@ -44,7 +44,7 @@ struct Subprocess {
 
   /// Returns ExitSuccess on successful process exit, ExitInterrupted if
   /// the process was interrupted, ExitFailure if it otherwise failed.
-  ExitStatus Finish();
+  int Finish();
 
   bool Done() const;
 

src/subprocess_test.cc

@@ -14,6 +14,7 @@
 
 #include "subprocess.h"
 
+#include "exit_status.h"
 #include "test.h"
 
 #ifndef _WIN32
@@ -50,7 +51,10 @@ TEST_F(SubprocessTest, BadCommandStderr) {
     subprocs_.DoWork();
   }
 
-  EXPECT_EQ(ExitFailure, subproc->Finish());
+  int exit = subproc->Finish();
+  EXPECT_NE(ExitSuccess, exit);
+  EXPECT_NE(ExitFailure, exit);
+  EXPECT_NE(ExitInterrupted, exit);
   EXPECT_NE("", subproc->GetOutput());
 }
 
@@ -64,7 +68,10 @@ TEST_F(SubprocessTest, NoSuchCommand) {
     subprocs_.DoWork();
   }
 
-  EXPECT_EQ(ExitFailure, subproc->Finish());
+  int exit = subproc->Finish();
+  EXPECT_NE(ExitSuccess, exit);
+  EXPECT_NE(ExitFailure, exit);
+  EXPECT_NE(ExitInterrupted, exit);
   EXPECT_NE("", subproc->GetOutput());
 #ifdef _WIN32
   ASSERT_EQ("CreateProcess failed: The system cannot find the file "