Derek Price wrote:
I don't suppose you could come up with a configure test or a short C
program that fails to compile (preferrably) or run (if necessary) to
spot this, short of actually switching on the system name or something
similar?
The test would have to be a run test, which would mean having a
cross-compile alternative switching on the system name (this is why gcc
switches on name).
Just doing the same thing as gnulib does will show the failure:
int main(){
void * address = NULL;
static int fd =-1;
int ret = 0;
fd = open ("/dev/zero",O_RDONLY,666);
ret = mmap (NULL, 4096, PROT_READ | PROT_WRITE, MAP_FILE |
MAP_PRIVATE, fd, 0);
if (ret != MAP_FAILED) return 0;
return 1;
}
Hope this helps,
Peter
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