toolchain/51459: GCC 5.4 trips over itself compiling ruby22-base on i386

[coypu%sdf.org@localhost]

>Number:         51459
>Category:       toolchain
>Synopsis:       GCC 5.4 trips over itself compiling ruby22-base on i386
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Sep 03 15:50:00 +0000 2016
>Originator:     coypu
>Release:        7.99.36
>Organization:
>Environment:
NetBSD laptop.Home 7.99.36 NetBSD 7.99.36 (GENERIC) #0: Fri Sep  2 13:12:59 IDT 2016  fly%net.Home@localhost:/usr/obj-i386/sys/arch/i386/compile/GENERIC i386
>Description:
Same package builds fine on 7.99.36/amd64 with GCC 5.4.0.
Unsetting MAKE_JOBS did not help.
I had trouble removing -O2. it may build once removed.

Looks as follows:

processing probes in object files
compiling ./enc/ascii.c
compiling ./enc/us_ascii.c
compiling ./enc/unicode.c
compiling ./enc/utf_8.c
compiling newline.c
compiling addr2line.c
compiling dmyext.c
compiling dmyenc.c
linking miniruby
`__x86.get_pc_thunk.bx' referenced in section `.text' of probes.o: defined in discarded section `.text.__x86.get_pc_thunk.bx[__x86.get_pc_thunk.bx]' of probes.o
`__x86.get_pc_thunk.bx' referenced in section `.text.startup' of probes.o: defined in discarded section `.text.__x86.get_pc_thunk.bx[__x86.get_pc_thunk.bx]' of probes.o
`__x86.get_pc_thunk.bx' referenced in section `.text.exit' of probes.o: defined in discarded section `.text.__x86.get_pc_thunk.bx[__x86.get_pc_thunk.bx]' of probes.o
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/lang/ruby22-base/work/ruby-2.2.5
*** Error code 1

Stop.
make[1]: stopped in /usr/pkgsrc/lang/ruby22-base
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/lang/ruby22-base
>How-To-Repeat:

>Fix:
No idea.