Per #1027832.

This reverts commit 7d4194cd.

It's Priority:required but not build-essential.

Fixed powerpc perf tests only. No need for others to upgrade

Fixes GH #113, reported by @kilobyte

but disable it for now, until we can find out how to start a build

we have a good one at github

Still better than shipping the UCD files.
Fixes GH #112

Fixes GH #110, by Tomasz Kłoczko (@kloczek)

and adjust tests. we are at 15 already (!), latest perl5.35 just at 14

Thanks to @ulatekh, GH #109

no update, which is broken

Allow the user to disable hardening which is enabled by default since
version 02092020 and
https://github.com/rurban/safeclib/commit/caa4408eb4a5c767f0474258af3b6ccf444e10aa
to avoid the following build failure when the toolchain doesn't support
stack-protector:

/home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/m68k-buildroot-uclinux-uclibc/bin/ld.real: ../src/.libs/libsafec-3.6.0.a(safe_mem_constraint.o): in function `handle_mem_bos_chk_warn':
safe_mem_constraint.c:(.text+0x40): undefined reference to `__stack_chk_guard'

Fixes:
 - http://autobuild.buildroot.org/results/a481ee2d26a094358b0298617cce691be3077f22



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

-fno-strict-aliasing -fno-strict-overflow -fno-delete-null-pointer-checks
-fno-lifetime-dse
to restrict wrong UB optimizations.
See https://gcc.gnu.org/wiki/boringcc

The kernel caches the stat mode, fchmod fails.
So close the file, and re-open with wrong perms.

some windows variants return EINVAL with fopen w+ (not wine, but
on Github actions Windows Server 2019), so workaround that quirks

not just EBADF on closed files. also permission errors.
use fputc instead of fprintf internally.
test: also check the written filecontent.

return the result of the systemcall. esp. for print to stdout or FILE.
Fixes the unportability of the latest test_vfprintf_s across libc's.

as formerly only with musl or msvcrt, but now for all libc's.
With the optional ENABLE_ILLEGAL_FORMATSPECIFIER you get back
the old glibc and bsd libc behaviour.
(when people forget about %% to print a single %)

using _ is reserved

check BOS(base) if known

warning: return value '-ESNULLP' of *printf_s has multiple documentation sections