https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108568
Bug ID: 108568
Summary: FAILs in 17_intro/names.cc
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
On gcc112 I'm seeing
FAIL: 17_intro/names.cc (test for excess errors)
FAIL: experimental/names.cc (test for excess errors)
These are because glibc < 2.19 used __unused as field member of various
structs,
including mcontext_t in sys/ucontext.h on ppc64le.
This was changed in glibc with
https://gcc.gnu.org/pipermail/libc-alpha/2013-November/045766.html
names.cc even has
#ifdef __GLIBC_PREREQ
#if ! __GLIBC_PREREQ(2, 19)
// Glibc defines this prior to 2.19
#undef __unused
#endif
#endif
for it, but it doesn't work. The reason is that __GLIBC_PREREQ is defined in
<features.h> but nothing included that header before this spot (it is included
later
from bits/stdc++.h).
Can't it use
#if __GLIBC__ == 1 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 19)
instead? Or just
#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 19
(because who knows what glibc 1 actually used, that was 1996 and already in
1997 we had glibc 2.x).
