refs #5120 fix up linking on linux

git-svn-id: file:///svn/toku/tokudb@50926 c7de825b-a66e-492c-adef-691d508d4ae1

cmake_modules/TokuFeatureDetection.cmake

@@ -88,6 +88,12 @@ if (NOT HAVE_BACKTRACE_WITHOUT_EXECINFO)
   endif ()
 endif ()
 
+if(HAVE_CLOCK_REALTIME)
+  list(APPEND EXTRA_SYSTEM_LIBS rt)
+else()
+  list(APPEND EXTRA_SYSTEM_LIBS System)
+endif()
+
 set(CMAKE_REQUIRED_LIBRARIES pthread)
 ## check whether we can change rwlock preference
 check_function_exists(pthread_rwlockattr_setkind_np HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP)

portability/tests/CMakeLists.txt

@@ -29,11 +29,6 @@ if(BUILD_TESTING)
     add_executable(${test} ${test})
     target_link_libraries(${test} ${LIBTOKUPORTABILITY})
     set_target_properties(${test} PROPERTIES POSITION_INDEPENDENT_CODE ON)
-    if(HAVE_CLOCK_REALTIME)
-      target_link_libraries(${test} rt)
-    else()
-      target_link_libraries(${test} System)
-    endif()
   endforeach(test)
 
   list(REMOVE_ITEM tests test-pwrite4g)

portability/toku_time.h

@@ -24,8 +24,7 @@ typedef int clockid_t;
 // without a real clock_gettime()
 #define CLOCK_REALTIME 0x01867234
 #endif
-int
-toku_clock_gettime(clockid_t clk_id, struct timespec *ts);
+int toku_clock_gettime(clockid_t clk_id, struct timespec *ts) __attribute__((__visibility__("default")));
 
 // *************** Performance timers ************************
 // What do you really want from a performance timer: