always link against libgomp

cmake/check_stxxl.cmake

@@ -1,24 +0,0 @@
-INCLUDE (CheckCXXSourceCompiles)
-unset(STXXL_WORKS CACHE)
-set (STXXL_CHECK_SRC "#include <stxxl/vector>\n int main() { stxxl::vector<int> vec; return 0;}")
-set (CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
-set (CMAKE_REQUIRED_INCLUDES "${STXXL_INCLUDE_DIR}")
-set (CMAKE_REQUIRED_LIBRARIES "${STXXL_LIBRARY}")
-
-CHECK_CXX_SOURCE_COMPILES("${STXXL_CHECK_SRC}" STXXL_WORKS)
-
-if(STXXL_WORKS)
-  message(STATUS "STXXL can be used without linking against libgomp")
-else()
-  message(STATUS "Linking STXXL failed without libgomp, retrying ..")
-  find_package(OpenMP)
-  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}${OpenMP_CXX_FLAGS}")
-  CHECK_CXX_SOURCE_COMPILES("${STXXL_CHECK_SRC}" STXXL_LINKS)
-
-  if (STXXL_LINKS)
-    message(STATUS "STXXL needs to link against OpenMP")
-    target_link_libraries(osrm-extract gomp)
-  else()
-    message(FATAL_ERROR "STXXL failed failed, libgomp missing?")
-  endif()
-endif()