GHS: Add platform selection support

Help/generator/Green Hills MULTI.rst

@@ -13,6 +13,11 @@ The ``-T <toolset>`` can be supplied for setting the toolset to be used.
 All toolsets are expected to be located at ``GHS_TOOLSET_ROOT``.
 If the toolset is not specified then the latest toolset will be used.
 
+* ``GHS_TARGET_PLATFORM``
+
+Default to ``integrity``.
+Usual values are ``integrity``, ``threadx``, ``uvelosity``,
+``velosity``, ``vxworks``, ``standalone``.
 
 * ``GHS_TOOLSET_ROOT``
 

Source/cmGlobalGhsMultiGenerator.cxx

@@ -127,6 +127,16 @@ bool cmGlobalGhsMultiGenerator::SetGeneratorPlatform(std::string const& p,
                            cmStateEnums::INTERNAL);
   }
 
+  const char* tgtPlatform = mf->GetDefinition("GHS_TARGET_PLATFORM");
+  if (tgtPlatform == nullptr) {
+    tgtPlatform = "integrity";
+  }
+
+  /* store the platform name for later use */
+  mf->AddCacheDefinition("GHS_TARGET_PLATFORM", tgtPlatform,
+                         "Name of GHS target platform.",
+                         cmStateEnums::INTERNAL);
+
   return true;
 }