Fix build on OSX

- Workaround linker bug that prevents linking aria test executables
   using -fno-common on OSX
- Skip system readline detection (OSX readline is incompatible one)
- Make Xcode generator work

cmake/readline.cmake

@@ -210,7 +210,10 @@ MACRO (MYSQL_CHECK_READLINE)
     IF(WITH_READLINE)
       MYSQL_USE_BUNDLED_READLINE()
     ELSE()
+      # OSX includes incompatible readline lib
+      IF (NOT APPLE)
         MYSQL_FIND_SYSTEM_READLINE()
+      ENDIF()
       IF(NOT USE_NEW_READLINE_INTERFACE)
         MYSQL_FIND_SYSTEM_LIBEDIT()
         IF(NOT USE_LIBEDIT_INTERFACE)

configure.cmake

@@ -149,7 +149,9 @@ IF(UNIX)
   SET(CMAKE_REQUIRED_LIBRARIES 
     ${LIBM} ${LIBNSL} ${LIBBIND} ${LIBCRYPT} ${LIBSOCKET} ${LIBDL} ${CMAKE_THREAD_LIBS_INIT} ${LIBRT})
 
+  IF(CMAKE_REQUIRED_LIBRARIES)
     LIST(REMOVE_DUPLICATES CMAKE_REQUIRED_LIBRARIES)
+  ENDIF()
   LINK_LIBRARIES(${CMAKE_THREAD_LIBS_INIT})
   
   OPTION(WITH_LIBWRAP "Compile with tcp wrappers support" OFF)

dbug/CMakeLists.txt

@@ -27,7 +27,7 @@ TARGET_LINK_LIBRARIES(tests dbug)
 ADD_EXECUTABLE(factorial my_main.c factorial.c)
 TARGET_LINK_LIBRARIES(factorial dbug)
 
-IF(NOT WIN32)
+IF(NOT WIN32 AND NOT CMAKE_GENERATOR MATCHES Xcode)
   FIND_PROGRAM(GROFF groff)
   FIND_PROGRAM(NROFF nroff)
   SET(OUTPUT_INC output1.r output2.r output3.r output4.r output5.r)
@@ -63,5 +63,5 @@ IF(NOT WIN32)
     ADD_CUSTOM_TARGET(t ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/user.t)
   ENDIF(NROFF)
 
-ENDIF(NOT WIN32)
+ENDIF()
 

storage/maria/CMakeLists.txt

@@ -41,6 +41,11 @@ SET(ARIA_SOURCES ma_init.c ma_open.c ma_extra.c ma_info.c ma_rkey.c
             ma_norec.c
 )
 
+IF(APPLE)
+  # Workaround linker bug on OSX 10.7
+  ADD_DEFINITIONS(-fno-common)
+ENDIF()
+
 MYSQL_ADD_PLUGIN(aria ${ARIA_SOURCES} 
   STORAGE_ENGINE STATIC_ONLY DEFAULT
   RECOMPILE_FOR_EMBEDDED)