ENH: add -Wl,-relax to the default linker flags for BlueGene, otherwise you can get "relocation truncated to fit" errors

Alex

Modules/FindPythonLibs.cmake

@@ -108,6 +108,7 @@ MACRO(PYTHON_ADD_MODULE _NAME )
     ENDIF(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
 
     SET(PY_MODULES_LIST  ${PY_MODULES_LIST} ${_NAME} CACHE STRING "Collect a list of all added python modules" FORCE)
+    message(STATUS "modules: ${PY_MODULES_LIST}")
     ADD_LIBRARY(${_NAME} ${PY_MODULE_TYPE} ${ARGN})
 #    TARGET_LINK_LIBRARIES(${_NAME} ${PYTHON_LIBRARIES})
   ENDIF(PYTHON_ENABLE_MODULE_${_NAME})

Modules/Platform/BlueGeneL.cmake

@@ -23,15 +23,10 @@ INCLUDE(Platform/UnixPaths)
 
 IF(CMAKE_COMPILER_IS_GNUCC)
   SET(CMAKE_C_LINK_EXECUTABLE
-    "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES> -Wl,-lgcc,-lc -lnss_files -lnss_dns -lresolv")
+    "<CMAKE_C_COMPILER> -Wl,-relax <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES> -Wl,-lgcc,-lc -lnss_files -lnss_dns -lresolv")
 ENDIF(CMAKE_COMPILER_IS_GNUCC)
 
 IF(CMAKE_COMPILER_IS_GNUCXX)
   SET(CMAKE_CXX_LINK_EXECUTABLE
-    "<CMAKE_CXX_COMPILER>  <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES> -Wl,-lstdc++,-lgcc,-lc -lnss_files -lnss_dns -lresolv")
+    "<CMAKE_CXX_COMPILER>  -Wl,-relax <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES> -Wl,-lstdc++,-lgcc,-lc -lnss_files -lnss_dns -lresolv")
 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
-
-SET(CMAKE_CXX_LINK_SHARED_LIBRARY)
-SET(CMAKE_CXX_LINK_MODULE_LIBRARY)
-SET(CMAKE_C_LINK_SHARED_LIBRARY)
-SET(CMAKE_C_LINK_MODULE_LIBRARY)