環境：ubuntu 10.0.4
ubuntu下object-c的開發環境搭建:
1.安裝gnustep和gobjc
sudo apt-get install gobjc gnustep gnustep-devel
需要公升級一下
2.hello world
#import
int main(int argc, const char *argv)
3.環境設定
hello.m:1: fatal error: foundation/foundation.h: 沒有那個檔案或目錄
compilation terminated.
4.gcc `gnustep-config --objc-flags` hello.m -o hello
/tmp/ccrmas5f.o: in function `main':
/home/shaochangqing/study/hello.m:3: undefined reference to `objc_get_class'
/home/shaochangqing/study/hello.m:3: undefined reference to `objc_msg_lookup'
/home/shaochangqing/study/hello.m:3: undefined reference to `objc_msg_lookup'
/home/shaochangqing/study/hello.m:4: undefined reference to `nslog'
/home/shaochangqing/study/hello.m:5: undefined reference to `objc_msg_lookup'
/tmp/ccrmas5f.o: in function `__objc_gnu_init':
/home/shaochangqing/study/hello.m:7: undefined reference to `__objc_exec_class'
/tmp/ccrmas5f.o:(.data.rel+0x0): undefined reference to `__objc_class_name_nsautoreleasepool'
/tmp/ccrmas5f.o:(.data.rel+0x8): undefined reference to `__objc_class_name_nsconstantstring'
collect2: ld returned 1 exit status
5.鏈結庫
gcc `gnustep-config --objc-flags` -lgnustep-base hello.m -o hello
注意不是單引號
6.run it
2012-05-13 13:59:05.650 hello[6374] hello world
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