Да, вот последние строчки:

[code]
checking for int size

objs/autotest.c:1: error: CPU you selected does not support x86-64 instruction set
objs/autotest.c:1: error: CPU you selected does not support x86-64 instruction set
----------

#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <sys/resource.h>
#include <inttypes.h>


int main() {
printf("%d", sizeof(int));
return 0;
}

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gcc -march=pentium4 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -o objs/autotest objs/autotest.c
----------

[/code]