| 2014-11-14 22:34:07 |
Alan Chen |
description |
Sample program below compiles with gcc with no errors, but results with a compile error with g++
g++ version: 4.8.2-19ubuntu1
gcc -O2 prog.c # ok
g++ -O2 prog.c # error
In file included from /usr/include/fcntl.h:279:0,
from prog.c:6:
In function ‘int open(const char*, int, ...)’,
inlined from ‘int main()’ at prog.c:12:40:
/usr/include/x86_64-linux-gnu/bits/fcntl2.h:44:28: error: call to ‘__open_too_many_args’ declared with attribute error: open can be called either with 2 or 3 arguments, not more
__open_too_many_args ();
Sample program:
#pragma GCC optimize ("O0")
#include <fcntl.h>
#include <unistd.h>
int main()
{
int fd;
fd = open( "filename", O_RDONLY, 0644);
if (fd < 0) return 1;
close(fd);
return 0;
} |
Sample program below compiles with gcc with no errors, but results with a compile error with g++
g++ version: 4.8.2-19ubuntu1
gcc -O2 prog.c # ok
g++ -O2 prog.c # error
In file included from /usr/include/fcntl.h:279:0,
from prog.c:5:
In function ‘int open(const char*, int, ...)’,
inlined from ‘int main()’ at prog.c:12:40:
/usr/include/x86_64-linux-gnu/bits/fcntl2.h:44:28: error: call to ‘__open_too_many_args’ declared with attribute error: open can be called either with 2 or 3 arguments, not more
__open_too_many_args ();
Sample program:
#pragma GCC optimize ("O0")
#include <fcntl.h>
#include <unistd.h>
int main()
{
int fd;
fd = open( "filename", O_RDONLY, 0644);
if (fd < 0) return 1;
close(fd);
return 0;
} |
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