用gcc警告 [英] Warnings with gcc
问题描述
您好，
编译时收到警告：
#include< string.h>
int main（int argc，char ** argv）
{
char * s;
s = strdup（" a string"）;
返回0;
}
与gcc（GCC）3.3.5（Debian 1：3.3.5-8ubuntu2）：
$ gcc -Wall -ansi warning.c
warning.c：在函数main中：
警告。 c：7：警告：隐式声明函数`strdup''
warning.c：7：警告：赋值使得整数指针没有
cast
有谁知道我怎么能压制这个警告？
如果我放一个演员：s =（char *）strdup（" a string"） ;
我收到另一个警告信息：
warning.c：7：警告：隐式声明函数`strdup''
我不明白为什么会发生这种情况因为strdup声明在
string.h
谢谢，
Thibault Langlois
Hello,
I get a warning when I compile:
#include <string.h>
int main (int argc, char ** argv)
{
char * s;
s = strdup("a string");
return 0;
}
with gcc (GCC) 3.3.5 (Debian 1:3.3.5-8ubuntu2) :
$ gcc -Wall -ansi warning.c
warning.c: In function `main'':
warning.c:7: warning: implicit declaration of function `strdup''
warning.c:7: warning: assignment makes pointer from integer without a
cast
Does anybody knows how can I supress this warning ?
if I put a cast : s = (char *) strdup("a string");
I get another warning message:
warning.c:7: warning: implicit declaration of function `strdup''
I do not understand why this happens because strdup is declared in
string.h
Thanks,
Thibault Langlois
推荐答案
gcc -Wall -ansi warning.c
warning.c：在函数main中：
warning.c：7：警告：隐式声明函数`strdup''
warning.c：7：警告：赋值使整数指针没有
施放
有谁知道怎么能压制这个警告？
如果我放一个演员：s =（char *）strdup（" a string"）;
我收到另一个警告信息：
warning.c：7 ：警告：隐式声明函数`strdup''
我不明白为什么会发生这种情况因为strdup在
string.h中声明
谢谢，
Thibault Langlois
gcc -Wall -ansi warning.c
warning.c: In function `main'':
warning.c:7: warning: implicit declaration of function `strdup''
warning.c:7: warning: assignment makes pointer from integer without a
cast
Does anybody knows how can I supress this warning ?
if I put a cast : s = (char *) strdup("a string");
I get another warning message:
warning.c:7: warning: implicit declaration of function `strdup''
I do not understand why this happens because strdup is declared in
string.h
Thanks,
Thibault Langlois
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news：11 ********************** @ g47g2000cwa.googlegr oups.com ...
<th***************@di.fc.ul.pt> wrote in message
news:11**********************@g47g2000cwa.googlegr oups.com...
你好，
我编译时会收到警告：
#include< string.h>
int main（int argc，char ** argv）
{*> char * s;
s = strdup（" a string"）;
返回0;
}
使用gcc（ GCC）3.3.5（Debian 1：3.3.5-8ubuntu2）：
Hello,
I get a warning when I compile:
#include <string.h>
int main (int argc, char ** argv)
{
char * s;
s = strdup("a string");
return 0;
}
with gcc (GCC) 3.3.5 (Debian 1:3.3.5-8ubuntu2) :
gcc -Wall -ansi warning.c
warning.c ：在函数`main''中：
warning.c：7：警告：隐式声明函数`strdup''
warning.c：7：警告：赋值使整数指针不带
施放
有谁知道我怎么能压制这个警告？
如果我放一个演员：s =（char *）strdup（" a string"）; <我收到另一个警告信息：
warning.c：7：警告：隐式声明函数`strdup''
我不明白为什么会发生这种情况因为strdup在
string.h
gcc -Wall -ansi warning.c
warning.c: In function `main'':
warning.c:7: warning: implicit declaration of function `strdup''
warning.c:7: warning: assignment makes pointer from integer without a
cast
Does anybody knows how can I supress this warning ?
if I put a cast : s = (char *) strdup("a string");
I get another warning message:
warning.c:7: warning: implicit declaration of function `strdup''
I do not understand why this happens because strdup is declared in
string.h
好吧，它不可能 - 除非编译器错了吗？
你确认它在[你的] string.h中吗？
你的预处理输出是否包含它？
它链接？
rayw
Well, it can''t be can it - unless the compiler''s wrong?
Have you confirmed that it''s in [your] string.h?
Does your preprocessed output contain it?
Does it link?
rayw
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