Ninja: Add internal tool to scan Fortran code for module dependencies

Create an internal `cmake -E cmake_ninja_depends` tool to scan an
already-preprocessed Fortran translation unit for modules that it
provides or requires.  Save the information in a "ddi" file with a
CMake-private format for intermediate dynamic dependency information.
This file may the be loaded by another tool to be added later.

1 files changed, 10 insertions, 0 deletions

diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index 9daed4b..998a7ad 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -52,6 +52,9 @@
 #include <stdlib.h>
 #include <time.h>
 
+int cmcmd_cmake_ninja_depends(std::vector<std::string>::const_iterator argBeg,
+                              std::vector<std::string>::const_iterator argEnd);
+
 void CMakeCommandUsage(const char* program)
 {
   std::ostringstream errorStream;
@@ -782,6 +785,13 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& args)
       return cmcmd::ExecuteLinkScript(args);
     }
 
+#ifdef CMAKE_BUILD_WITH_CMAKE
+    // Internal CMake ninja dependency scanning support.
+    else if (args[1] == "cmake_ninja_depends") {
+      return cmcmd_cmake_ninja_depends(args.begin() + 2, args.end());
+    }
+#endif
+
     // Internal CMake unimplemented feature notification.
     else if (args[1] == "cmake_unimplemented_variable") {
       std::cerr << "Feature not implemented for this platform.";