On 2025-09-16 11:51, Steffen Nurpmeso wrote:
I attach a tar archives of the two different logfiles, maybe some
GNU build system guru can figure out more.
The first difference in those logs occurs when 'configure' compiles and
run the following program. It should succeed (exit status 0) but in your
fakeroot build it fails and 'configure' then assumes chown needs
replacement. Can you figure out why the test program fails (exit status
5) in the fakeroot environment? You can use strace to help find out.
Once we figure this out, it may explain the other differences in the logs.
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
int
main (void)
{
struct stat st1, st2;
if (close (creat ("conftest.file", 0600))) return 1;
if (stat ("conftest.file", &st1)) return 2;
sleep (1);
if (chown ("conftest.file", st1.st_uid, st1.st_gid)) return 3;
if (stat ("conftest.file", &st2)) return 4;
if (st2.st_ctime <= st1.st_ctime) return 5;
}
Here's what strace says on my Fedora 42 host:
creat("conftest.file", 0600) = 3
close(3) = 0
newfstatat(AT_FDCWD, "conftest.file", {st_mode=S_IFREG|0600,
st_size=0, ...}, 0) = 0
clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=1, tv_nsec=0},
0x7fffc15bb1f0) = 0
chown("conftest.file", 1000, 1000) = 0
newfstatat(AT_FDCWD, "conftest.file", {st_mode=S_IFREG|0600,
st_size=0, ...}, 0) = 0
exit_group(0) = ?
