Teach GenerateBuildCommand to find its own make program

Add a cmGlobalGenerator::SelectMakeProgram method to select a
caller-provided make program, the CMAKE_MAKE_PROGRAM cache entry, or a
generator-provided default.  Call it from all implementations of the
GenerateBuildCommand method with the corresponding generator's default,
if any.

1 files changed, 20 insertions, 0 deletions

diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index b653aff..9609497 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -88,6 +88,26 @@ bool cmGlobalGenerator::SetGeneratorToolset(std::string const& ts)
   return false;
 }
 
+std::string cmGlobalGenerator::SelectMakeProgram(const char* makeProgram,
+                                                 std::string makeDefault)
+{
+  if(cmSystemTools::IsOff(makeProgram))
+    {
+    makeProgram =
+      this->CMakeInstance->GetCacheDefinition("CMAKE_MAKE_PROGRAM");
+    if(cmSystemTools::IsOff(makeProgram))
+      {
+      makeProgram = makeDefault.c_str();
+      }
+    if(cmSystemTools::IsOff(makeProgram) &&
+       !(makeProgram && *makeProgram))
+      {
+      makeProgram = "CMAKE_MAKE_PROGRAM-NOTFOUND";
+      }
+    }
+  return makeProgram;
+}
+
 void cmGlobalGenerator::ResolveLanguageCompiler(const std::string &lang,
                                                 cmMakefile *mf,
                                                 bool optional)