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###########################################
# #
# Improvements and feedback are welcome #
# #
# This file is released under GPL >= 3 #
# #
###########################################
##### check for large file support
check_cxx_source_compiles("
#define _LARGEFILE_SOURCE
#define _LARGE_FILES
#define _FILE_OFFSET_BITS 64
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <stdio.h>
int main( int, char **argv )
{
// check that off_t can hold 2^63 - 1 and perform basic operations...
#define OFF_T_64 (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
if (OFF_T_64 % 2147483647 != 1)
return 1;
// stat breaks on SCO OpenServer
struct stat buf;
stat( argv[0], &buf );
if (!S_ISREG(buf.st_mode))
return 2;
FILE *file = fopen( argv[0], \"r\" );
off_t offset = ftello( file );
fseek( file, offset, SEEK_CUR );
fclose( file );
return 0;
}"
QT_LARGEFILE_SUPPORT)
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