allow build version to be set, while preserving program version

useful for creating a config.h via an extraction script that creates a source tar bundle

CMakeLists.txt

@@ -117,6 +117,14 @@ if(UNIX)
  create_svn_version_header()
 endif(UNIX)
 
+if(EXISTS ${CMAKE_SOURCE_DIR}/include/config.h)
+ # This file may exist (created by an alternate process to the svn test above),
+ # e.g. could be created by a checkout script that produces a source tar file.
+ # This directive means the about box will have the svn date & revision in it,
+ # but the hard coded release date (program version) will be preserved.
+ add_definitions(-DHAVE_SVN_REVISION)
+endif(EXISTS ${CMAKE_SOURCE_DIR}/include/config.h)
+
 
 # Include paths.
 include_directories(${CMAKE_SOURCE_DIR}/include

CMakeModules/CreateSVNVersionHeader.cmake

@@ -14,6 +14,8 @@ macro(create_svn_version_header)
         # Subversion info command instead of hand coded date and revision in
         # "include/build_version.h".  If subversion is not found then the date
         # and version information must be manually edited.
+        # Directive means SVN build, program version and build version will
+        # reflect this.
         add_definitions(-DHAVE_SVN_VERSION)
 
         # Generate config.h.

include/build_version.h

@@ -16,7 +16,7 @@ COMMON_GLOBL wxString g_BuildVersion
 
 COMMON_GLOBL wxString g_BuildAboutVersion
 #ifdef EDA_BASE
-#  ifdef HAVE_SVN_VERSION
+#  if defined(HAVE_SVN_VERSION) || defined(HAVE_SVN_REVISION)
 #    include "config.h"
      (wxT(KICAD_ABOUT_VERSION))
 #  else