ENH: add a rule to automatically re-run cmake from the top if the CMakeCache.txt file is changed

1 files changed, 11 insertions, 1 deletions

diff --git a/Source/cmCacheManager.cxx b/Source/cmCacheManager.cxx
index 81762a1..8609db3 100644
--- a/Source/cmCacheManager.cxx
+++ b/Source/cmCacheManager.cxx
@@ -456,8 +456,18 @@ bool cmCacheManager::SaveCache(const char* path)
   cmSystemTools::CopyFileIfDifferent(tempFile.c_str(),
                                      cacheFile.c_str());
   cmSystemTools::RemoveFile(tempFile.c_str());
-  return true;
+  std::string checkCacheFile = path;
+  checkCacheFile += "/cmake.check_cache";
+  std::ofstream checkCache(checkCacheFile.c_str());
+  if(!checkCache)
+    {
+    cmSystemTools::Error("Unable to open check cache file for write. ", 
+                         checkCacheFile.c_str());
+    return false;
     }
+  checkCache << "# This file is generated by cmake for dependency checking of the CMakeCache.txt file\n";
+  return true;
+}
 
 void cmCacheManager::OutputHelpString(std::ofstream& fout, 
                                       const std::string& helpString)