g++ 错误:“stricmp"未在此范围内声明(但“strcmp"可以)

I am trying to compile the following very very simple piece of source code:

#include <cstring>
// #include <string.h>
// using namespace std;

class Helper {
public:
    int cStringsAreEqual(const char *s1, const char *s2) {
        return stricmp(s1, s2);
    }
};

...但我收到以下错误消息:

   g++ error: ‘stricmp’ was not declared in this scope