* [musl] sqrt does not emit errno=EDOM
@ 2025-07-03 7:44 Paul Zimmermann
0 siblings, 0 replies; only message in thread
From: Paul Zimmermann @ 2025-07-03 7:44 UTC (permalink / raw)
To: musl; +Cc: maxence.ponsardin
Hi,
it seems musl does not set errno=EDOM for sqrt(x) when x is negative.
Here on cfarm27 (Alpine Linux):
$ cat /tmp/e.c
#include <stdio.h>
#include <math.h>
#include <errno.h>
int
main()
{
errno = 0;
float x = -1.0f;
float y = sqrtf (x);
printf ("y=%a errno=%d\n", y, errno);
}
$ gcc /tmp/e.c -lm
$ ./a.out
y=-nan errno=0
Is this a known issue?
Best regards,
Paul
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