对于使用块的clang程序,需要链接哪些库

我发现(下面)在编译使用块的代码时需要使用-fblock。

我需要针对哪个库进行链接以让链接器解决nsconcreteStackBlock?(在Ubuntu 9.10 AMD64上。)

chris@chris-desktop:~$ clang ctest.c 

ctest.c:3:25: error: blocks support disabled - compile with -fblocks or pick a
      deployment target that supports them
void call_a_block(void (^blockptr)(int)) {
                        ^
ctest.c:11:19: error: blocks support disabled - compile with -fblocks or pick a
      deployment target that supports them
    call_a_block( ^(int y) { 
                  ^
2 diagnostics generated.
chris@chris-desktop:~$ clang ctest.c -fblocks
/tmp/cc-4sPSeO.o: In function `main':
ctest.c:(.text+0x79): undefined reference to `_NSConcreteStackBlock'
collect2: ld returned 1 exit status
clang: error: linker command failed with exit code 1 (use -v to see invocation)