[llvm-commits] [PATCH] [CMAKE] Fix git-svn output parsing

[pravic]

This prevents cmake fail on git-svn based repositories.

http://llvm-reviews.chandlerc.com/D104

Files:
  cmake/modules/VersionFromVCS.cmake

Index: cmake/modules/VersionFromVCS.cmake
===================================================================
--- cmake/modules/VersionFromVCS.cmake
+++ cmake/modules/VersionFromVCS.cmake
@@ -28,7 +28,7 @@
                       TIMEOUT 5
                       RESULT_VARIABLE git_result
                       OUTPUT_VARIABLE git_output)
-      if( git_result EQUAL 0 )
+      if( (git_result EQUAL 0) AND NOT (git_output STREQUAL "") )
         string(REGEX MATCH r[0-9]+ git_svn_rev ${git_output})
         string(LENGTH "${git_svn_rev}" rev_length)
         math(EXPR rev_length "${rev_length}-1")
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