1s/^char \$ac_func();/#if defined(__cplusplus) || defined(c_plusplus)\
2#include <stdlib.h>\
3#include <string.h>\
4#else\
5char \$ac_func();\
6#endif/
7s/^\$ac_func();/#if defined(__cplusplus) || defined(c_plusplus)\
8void (*pfun)(void) = (void (*)(void))\$ac_func;\
9#else\
10\$ac_func();\
11#endif/
12s/exit *(/return (/
13s/CFLAGS=" *-g */CFLAGS="/
14s/CFLAGS=" *-O2 */CFLAGS="/
15s/CXXFLAGS=" *-g */CXXFLAGS="/
16s/CXXFLAGS=" *-O2 */CXXFLAGS="/
17
18