使用 gcc编译是出现如下问题:
In function `_start':(.text+0x****): undefined reference to `main'....
例如:
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void test()
{
char* str = (char*)malloc(100);
strcpy(str,"hello");
//free(str);
if(str != NULL)
{
strcpy(str, "world");
}
printf("%s",str);
}
int main(int argc, char *argv[])
{
test();
return 0;
}
编写对应的makefile文件:
test:test.c
gcc-g -o test test.c
编译时会出现如下error:
/usr/lib/gcc/i686-linux-gnu/4.4.5/../../../../lib/crt1.o: In function `_start':
(.text+0xc): undefined reference to `__libc_csu_fini'
/usr/lib/gcc/i686-linux-gnu/4.4.5/../../../../lib/crt1.o: In function `_start':
(.text+0x11): undefined reference to `__libc_csu_init'
collect2: ld returned 1 exit status
make: *** [test] Error 1
这是没有使用了共享库,没有链接,添加了-shared选项之后,即可:
gcc -shared -g -o test test.c