Just got this error while building -current.
Source is mounted read-only.
Same failure for all archs (evbppc i386 sparc sparc64 at least).


/build/dist/src/build.sh -m evbppc -O /build/dist/obj/evbppc -D /build/dist/dist/evbppc -r build

...

===> MACHINE:          evbppc
===> MACHINE_ARCH:     powerpc
===> TOOLDIR path:     /build/dist/obj/evbppc/tooldir.NetBSD-1.6N-i386
===> DESTDIR path:     /build/dist/dist/evbppc
===> RELEASEDIR path:  /build/dist/obj/evbppc/releasedir

...

(cd /build/dist/src/gnu/lib/libgcc3 && /build/dist/obj/evbppc/tooldir.NetBSD-1.6N-i386/bin/nbmake dependall)
TM_DEFINES="NETBSD_ENABLE_PTHREADS"  HEADERS="ansidecl.h  rs6000/rs6000.h dbxelf.h elfos.h netbsd.h netbsd-elf.h freebsd-spec.h rs6000/sysv4.h rs6000/netbsd.h defaults.h" XM_DEFINES="POSIX"  TARGET_CPU_DEFAULT=""  /bin/sh /build/dist/src/gnu/dist/gcc/gcc/mkconfig.sh tconfig.h
/build/dist/src/gnu/dist/gcc/gcc/mkconfig.sh: cannot create tconfig.hT: read-only file system
/build/dist/src/gnu/dist/gcc/gcc/mkconfig.sh: cannot create tconfig.hT: read-only file system
/build/dist/src/gnu/dist/gcc/gcc/mkconfig.sh: cannot create tconfig.hT: read-only file system
[<81><C3>.<E8>: cannot create tconfig.hT: read-only file system
[<81><C3>.<E8>: cannot create tconfig.hT: read-only file system
[1]   Segmentation fault      TM_DEFINES="NETB...
*** Error code 139

-- 
Juergen Hannken-Illjes - hannken@eis.cs.tu-bs.de - TU Braunschweig (Germany)