CMake: Discriminate MINGW, MSYS, CYGWIN: does not try to build llvm-config under mingw without msys.

llvm-svn: 79202

llvm/cmake/modules/GetTargetTriple.cmake

@@ -8,6 +8,8 @@ function( get_target_triple var )
     else()
       set( ${var} "i686-pc-win32" PARENT_SCOPE )
     endif()
+  elseif( MINGW AND NOT MSYS )
+    set( ${var} "i686-pc-mingw32" PARENT_SCOPE )
   else( MSVC )
     set(config_guess ${LLVM_MAIN_SRC_DIR}/autoconf/config.guess)
     execute_process(COMMAND sh ${config_guess}

llvm/tools/CMakeLists.txt

@@ -2,7 +2,7 @@
 # large and three small executables. This is done to minimize memory load
 # in parallel builds.  Please retain this ordering.
 
-if( NOT MSVC )
+if( NOT WIN32 OR MSYS OR CYGWIN )
   # It is useful to build llvm-config before the other tools, so we
   # have a fresh LibDeps.txt for regenerating the hard-coded library
   # dependencies. llvm-config/CMakeLists.txt takes care of this but we