off_t problem with g++

[j1mw3b]

On linux 2.4, I could do the following with no warnings or errors.
On Linux 2.6 with gcc, it compiles but gives a warning. The created program works.
On Linux 2.6 with g++, it fails compile with an error.

What gives? Anyone know?

Thx,

Jim


My compile is like this:
cc offt.c -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o offt
g++ offt.c -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o offtp


#ifndef WIN32
#include <unistd.h>
#else
#endif
#include <stdlib.h>
#include <stdio.h>

int main( int argc, char *argv[] )
{
#ifdef WIN32
__int64 i64;
#else
off_t offt = 0;
long long lg = 0;
#endif

#ifdef WIN32
i64 = 9223372036854775807;
printf( "i64=%I64d, szi64=%d\n", i64, sizeof(i64) );
#else
offt = 9223372036854775807;
lg = 9223372036854775807;
printf( "offt=%lld, lg=%lld, szofft=%d, szlg=%d\n", offt, lg, sizeof(offt), sizeof(lg) );
#endif
}

[gerard4143]

Whats the error/warning?

[j1mw3b]

Oh right! The warning/error....

With cc:
offt.c: In function ΓÇÿmainΓÇÖ:
offt.c:21: warning: integer constant is too large for ΓÇÿlongΓÇÖ type
offt.c:22: warning: integer constant is too large for ΓÇÿlongΓÇÖ type

With g++:
offt.c:21: error: integer constant is too large for ΓÇÿlongΓÇÖ type
offt.c:22: error: integer constant is too large for ΓÇÿlongΓÇÖ type

It actually shows the funny characters too.

Jim

[j1mw3b]

And gcc -v yields: gcc version 4.1.2 20070925 (Red Hat 4.1.2-33)

[gerard4143]

try ending your long long const 9223372036854775807 with ll

example 9223372036854775807ll;

ll are the letters LL

This tells the compiler that the integers are long long consts

[j1mw3b]

Nope. Ending with LL doesn't help.

Thx anyway,

Jim

[gerard4143]

Thats odd...I copied your code and tried compiling and received the same errors as you, so I appened LL to the long long consts and the compile errors dissappeared.

note I only compiled it in C not C++

[j1mw3b]

Oops, my bad. I only did the LL on the off_t variable assignment.
Doing it on both made it work.

Thx,

Hate it when they just change the compiler (or the includes) like that.