BUG: Fixes for FindSubversion

- Split log out from Subversion_WC_INFO into Subversion_WC_LOG
  - Fix report of log info to be in <var-prefix>_WC_LAST_CHANGED_LOG
    as documented (instead of Subversion_LAST_CHANGED_LOG)
  - Fix setting of LC_ALL environment variable to be inside macro
  - Patch from Tanguy Krotoff
  - See issue #7047

Modules/FindSubversion.cmake

@@ -20,6 +20,8 @@
 #  IF(Subversion_FOUND)
 #    Subversion_WC_INFO(${PROJECT_SOURCE_DIR} Project)
 #    MESSAGE("Current revision is ${Project_WC_REVISION}")
+#    Subversion_WC_LOG(${PROJECT_SOURCE_DIR} Project)
+#    MESSAGE("Last changed log is ${Project_LAST_CHANGED_LOG}")
 #  ENDIF(Subversion_FOUND)
 
 # Copyright (c) 2006, Tristan Carel
@@ -52,11 +54,6 @@
 SET(Subversion_FOUND FALSE)
 SET(Subversion_SVN_FOUND FALSE)
 
-# the subversion commands should be executed with the C locale, otherwise
-# the message (which are parsed) may be translated, Alex
-SET(_Subversion_SAVED_LC_ALL "$ENV{LC_ALL}" )
-SET(ENV{LC_ALL} C)
-
 FIND_PROGRAM(Subversion_SVN_EXECUTABLE svn
   DOC "subversion command line client")
 MARK_AS_ADVANCED(Subversion_SVN_EXECUTABLE)
@@ -66,6 +63,11 @@ IF(Subversion_SVN_EXECUTABLE)
   SET(Subversion_FOUND TRUE)
 
   MACRO(Subversion_WC_INFO dir prefix)
+    # the subversion commands should be executed with the C locale, otherwise
+    # the message (which are parsed) may be translated, Alex
+    SET(_Subversion_SAVED_LC_ALL "$ENV{LC_ALL}")
+    SET(ENV{LC_ALL} C)
+
     EXECUTE_PROCESS(COMMAND ${Subversion_SVN_EXECUTABLE} --version
       WORKING_DIRECTORY ${dir}
       OUTPUT_VARIABLE Subversion_VERSION_SVN
@@ -96,9 +98,19 @@ IF(Subversion_SVN_EXECUTABLE)
 
     ENDIF(NOT ${Subversion_svn_info_result} EQUAL 0)
 
+    # restore the previous LC_ALL
+    SET(ENV{LC_ALL} ${_Subversion_SAVED_LC_ALL})
+
+  ENDMACRO(Subversion_WC_INFO)
+
+  MACRO(Subversion_WC_LOG dir prefix)
+    # This macro can block if the certificate is not signed:
+    # svn ask you to accept the certificate and wait for your answer
+    # This macro requires a svn server network access (Internet most of the time)
+    # and can also be slow since it access the svn server
     EXECUTE_PROCESS(COMMAND
       ${Subversion_SVN_EXECUTABLE} log -r BASE ${dir}
-      OUTPUT_VARIABLE Subversion_LAST_CHANGED_LOG
+      OUTPUT_VARIABLE ${prefix}_LAST_CHANGED_LOG
       ERROR_VARIABLE Subversion_svn_log_error
       RESULT_VARIABLE Subversion_svn_log_result
       OUTPUT_STRIP_TRAILING_WHITESPACE)
@@ -106,13 +118,10 @@ IF(Subversion_SVN_EXECUTABLE)
     IF(NOT ${Subversion_svn_log_result} EQUAL 0)
       MESSAGE(SEND_ERROR "Command \"${Subversion_SVN_EXECUTABLE} log -r BASE ${dir}\" failed with output:\n${Subversion_svn_log_error}")
     ENDIF(NOT ${Subversion_svn_log_result} EQUAL 0)
-  ENDMACRO(Subversion_WC_INFO)
+  ENDMACRO(Subversion_WC_LOG)
 
 ENDIF(Subversion_SVN_EXECUTABLE)
 
-# restore the previous LC_ALL
-SET(ENV{LC_ALL} ${_Subversion_SAVED_LC_ALL})
-
 IF(NOT Subversion_FOUND)
   IF(NOT Subversion_FIND_QUIETLY)
     MESSAGE(STATUS "Subversion was not found.")