解决方法
它正在调用名为_的函数.例如：
#include <stdio.h> void _(int a) { printf("%d",a); } int main(void) { _(3); return 0; }
_是gettext library中的现有函数,用于国际化.如this answer所述：
This function basically replaces the given string on runtime with a translation in the system’s language,if available (i.e. if they shipped a .mo file for this language with the program).
