[cmake-developers] CMake is slow for project with hundred target and one command with large number of dependencies

[Brad King]

On 08/06/2013 12:18 PM, Nicolas Desprès wrote:
> The test suite passes on my computer. I have force-pushed again.

Great.

In this hunk:

+  // If the queried path is not absolute we use the backward compatible
+  // version. The search algorithm is linear.
+  if (cname[0] != '/')

Use cmSystemTools::FileIsFullPath to detect a full path in a way that
works on Windows too.

> However I had one problem with BootstrapTest when trying to use cmsys::hash_map

During bootstrap we can just use normal std::map.  Squash the patch
below into your topic/use-cmsys-hash_map (and then into the original
topic).

-Brad


diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index e51d9c6..f00f47b 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -29,7 +29,9 @@

 #include <cmsys/auto_ptr.hxx>
 #include <cmsys/RegularExpression.hxx>
-#include <cmsys/hash_map.hxx>
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+# include <cmsys/hash_map.hxx>
+#endif

 class cmFunctionBlocker;
 class cmCommand;
@@ -1049,7 +1051,11 @@ private:
   cmSourceFile *LinearGetSourceFileWithOutput(const char *cname);

   // A map for fast output to input look up.
+#if defined(CMAKE_BUILD_WITH_CMAKE)
   typedef cmsys::hash_map<std::string, cmSourceFile*> OutputToSourceMap;
+#else
+  typedef std::map<std::string, cmSourceFile*> OutputToSourceMap;
+#endif
   OutputToSourceMap OutputToSource;

   void UpdateOutputToSourceMap(const std::vector<std::string>& outputs,
diff --git a/bootstrap b/bootstrap
index 9e6bfad..afb66e5 100755
--- a/bootstrap
+++ b/bootstrap
@@ -304,8 +304,6 @@ KWSYS_CXX_SOURCES="\
 KWSYS_FILES="\
   auto_ptr.hxx \
   Directory.hxx \
-  hash_map.hxx \
-  hashtable.hxx \
   Glob.hxx \
   Process.h \
   RegularExpression.hxx \