[Cygwin] Abandon Cygwin-1.5 and g++-3. Use g++-4.3 and higher on Cygwin-1.7.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148636 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/Tools.cpp

@@ -36,13 +36,6 @@
 #include "InputInfo.h"
 #include "ToolChains.h"
 
-#ifdef __CYGWIN__
-#include <cygwin/version.h>
-#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
-#define IS_CYGWIN15 1
-#endif
-#endif
-
 using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang;
@@ -2748,12 +2741,7 @@ void gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
   if (!customGCCName.empty())
     GCCName = customGCCName.c_str();
   else if (D.CCCIsCXX) {
-#ifdef IS_CYGWIN15
-    // FIXME: Detect the version of Cygwin at runtime?
-    GCCName = "g++-4";
-#else
     GCCName = "g++";
-#endif
   } else
     GCCName = "gcc";
 

lib/Frontend/InitHeaderSearch.cpp

@@ -386,8 +386,6 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
     AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
     // g++-4 / Cygwin-1.5
     AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
-    // FIXME: Do we support g++-3.4.4?
-    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "3.4.4");
     break;
   case llvm::Triple::MinGW32:
     // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)