Строю на Linux x86_64 NetBSD-current для i386.
*** buffer overflow detected ***: /home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x37)[0x7f256b6d9887]
/lib/libc.so.6[0x7f256b6d7750]
/lib/libc.so.6[0x7f256b6d6ae9]
/lib/libc.so.6(_IO_default_xsputn+0x96)[0x7f256b652116]
/lib/libc.so.6(_IO_padn+0xfa)[0x7f256b645aca]
/lib/libc.so.6(_IO_vfprintf+0x27a4)[0x7f256b623e24]
/lib/libc.so.6(__vsprintf_chk+0x9d)[0x7f256b6d6b8d]
/lib/libc.so.6(__sprintf_chk+0x80)[0x7f256b6d6ad0]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40887a]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x406c1e]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40910e]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40f9b9]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x403bc7]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40401d]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x404ac7]
/lib/libc.so.6(__libc_start_main+0xe6)[0x7f256b5f8466]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x401ec9]
======= Memory map: ========
00400000-00470000 r-xp 00000000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
0066f000-00670000 r--p 0006f000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
00670000-00671000 rw-p 00070000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
00671000-00675000 rw-p 00671000 00:00 0
02102000-023f9000 rw-p 02102000 00:00 0 [heap]
7f256b3c2000-7f256b3d8000 r-xp 00000000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b3d8000-7f256b5d8000 ---p 00016000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5d8000-7f256b5d9000 r--p 00016000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5d9000-7f256b5da000 rw-p 00017000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5da000-7f256b743000 r-xp 00000000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b743000-7f256b942000 ---p 00169000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b942000-7f256b946000 r--p 00168000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b946000-7f256b947000 rw-p 0016c000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b947000-7f256b94c000 rw-p 7f256b947000 00:00 0
7f256b94c000-7f256b96b000 r-xp 00000000 fe:01 8552467 /lib/ld-2.8.90.so
7f256bb4a000-7f256bb4c000 rw-p 7f256bb4a000 00:00 0
7f256bb5d000-7f256bb6a000 rw-p 7f256bb5d000 00:00 0
7f256bb6a000-7f256bb6b000 r--p 0001e000 fe:01 8552467 /lib/ld-2.8.90.so
7f256bb6b000-7f256bb6c000 rw-p 0001f000 fe:01 8552467 /lib/ld-2.8.90.so
7fff73b57000-7fff73b6c000 rw-p 7ffffffea000 00:00 0 [stack]
7fff73bff000-7fff73c00000 r-xp 7fff73bff000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Aborted
Если кому интересно, то вот
./build.sh -T ../tooldir -D ../destdir -R ../releasedir -O ../objdir -X ../xsrc -m i386 -U -x -r release
*** buffer overflow detected ***: /home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x37)[0x7f256b6d9887]
/lib/libc.so.6[0x7f256b6d7750]
/lib/libc.so.6[0x7f256b6d6ae9]
/lib/libc.so.6(_IO_default_xsputn+0x96)[0x7f256b652116]
/lib/libc.so.6(_IO_padn+0xfa)[0x7f256b645aca]
/lib/libc.so.6(_IO_vfprintf+0x27a4)[0x7f256b623e24]
/lib/libc.so.6(__vsprintf_chk+0x9d)[0x7f256b6d6b8d]
/lib/libc.so.6(__sprintf_chk+0x80)[0x7f256b6d6ad0]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40887a]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x406c1e]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40910e]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40f9b9]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x403bc7]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x40401d]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x404ac7]
/lib/libc.so.6(__libc_start_main+0xe6)[0x7f256b5f8466]
/home/alexey/NetBSD/src/../tooldir/bin/i386--netbsdelf-ar[0x401ec9]
======= Memory map: ========
00400000-00470000 r-xp 00000000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
0066f000-00670000 r--p 0006f000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
00670000-00671000 rw-p 00070000 fe:01 297761 /home/alexey/NetBSD/tooldir/bin/i386--netbsdelf-ar
00671000-00675000 rw-p 00671000 00:00 0
02102000-023f9000 rw-p 02102000 00:00 0 [heap]
7f256b3c2000-7f256b3d8000 r-xp 00000000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b3d8000-7f256b5d8000 ---p 00016000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5d8000-7f256b5d9000 r--p 00016000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5d9000-7f256b5da000 rw-p 00017000 fe:01 8552690 /lib/libgcc_s.so.1
7f256b5da000-7f256b743000 r-xp 00000000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b743000-7f256b942000 ---p 00169000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b942000-7f256b946000 r--p 00168000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b946000-7f256b947000 rw-p 0016c000 fe:01 8552490 /lib/libc-2.8.90.so
7f256b947000-7f256b94c000 rw-p 7f256b947000 00:00 0
7f256b94c000-7f256b96b000 r-xp 00000000 fe:01 8552467 /lib/ld-2.8.90.so
7f256bb4a000-7f256bb4c000 rw-p 7f256bb4a000 00:00 0
7f256bb5d000-7f256bb6a000 rw-p 7f256bb5d000 00:00 0
7f256bb6a000-7f256bb6b000 r--p 0001e000 fe:01 8552467 /lib/ld-2.8.90.so
7f256bb6b000-7f256bb6c000 rw-p 0001f000 fe:01 8552467 /lib/ld-2.8.90.so
7fff73b57000-7fff73b6c000 rw-p 7ffffffea000 00:00 0 [stack]
7fff73bff000-7fff73c00000 r-xp 7fff73bff000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Aborted
Если кому интересно, то вот
./build.sh -T ../tooldir -D ../destdir -R ../releasedir -O ../objdir -X ../xsrc -m i386 -U -x -r release
no subject
P.S. Похоже на косяки в netbsd*-ar. С обновлением тулчейна есть вероятность починки.