trouble with 2017Q3 bootstrap on Solaris 10 SPARC

[Andy Hooper <hooper%queensu.ca@localhost>]

env CC=/home/pkgsrc/gcc49/bin/gcc GCCBASE=/home/pkgsrc/gcc49 ./bootstrap
--abi=32 --prefix=/export/home/pkgsrc/2017Q3 --unprivileged
...
===> Installing dependencies for bsdinstall-20160108
=> Configuring and building libnbcompat
...
checking whether the C compiler works... no
configure: error: in
`/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat':
configure: error: C compiler cannot create executables

>From config.log this is due to:
ld: fatal: option -dn and -P are incompatible

Where is ld getting a -P option? Passing CFLAGS=-v in to bootstrap, this
appears to be due to an option '-rpath' passed through gcc collect2.

 /home/pkgsrc/gcc49/libexec/gcc/sparc-sun-solaris2.10/4.9.4/collect2 -V -Y
P,/usr/ccs/lib:/lib:/usr/lib -Qy
/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4/crt1.o
/usr/lib/crti.o /usr/ccs/lib/values-Xa.o
/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4/crtbegin.o
-L/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat
-L/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4
-L/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4/../../../../sparc-sun-solaris2.10/lib
-L/usr/ccs/lib
-L/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4/../../.. -rpath
/export/home/pkgsrc/2017Q3/lib /var/tmp//ccak8y6Q.o -lssp_nonshared -lssp
-lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc
/home/pkgsrc/gcc49/lib/gcc/sparc-sun-solaris2.10/4.9.4/crtend.o /usr/lib/crtn.o

Solaris ld has valid single character options -r -p -a -t and -h. -p and -P
are closely related, so possibly the error on -P could be due to the actual -p.

My first thought for a source was libtool, since it is providing platform
independent link options. It's configuration has a transform related to
rpath with a double --, but nothing for -Wl,-rpath.

work/wrk/pkgtools/bootstrap-mk-files/work/.cwrapper/config/libtool:transform=opt:-Wl,--rpath:-Wl,-R
work/wrk/sysutils/bsdinstall/work/.cwrapper/config/libtool:transform=opt:-Wl,--rpath:-Wl,-R

I'm not sure bootstrap has gotten to calling libtool yet.

> find work -type f -exec grep -l '.-Wl,-rpath' {} \;
work/share/mk/bsd.prog.mk
work/wrk/pkgtools/cwrappers/work/cwrappers-20170611/cleanup-cc.c
work/wrk/pkgtools/cwrappers/work/cwrappers-20170611/fixup-libtool.c
work/wrk/pkgtools/cwrappers/work/cwrappers-20170611/generic-transform-cc.c
work/wrk/pkgtools/cwrappers/work/cwrappers-20170611/normalise-cc.c
work/wrk/pkgtools/cwrappers/work/.wrapper/tmp/gen-transform
work/wrk/pkgtools/cwrappers/work/.wrapper/tmp/transform.sed
work/wrk/pkgtools/cwrappers/work/.wrapper/tmp/untransform.sed
work/wrk/pkgtools/cwrappers/work/.wrapper/tmp/arg-pp-main
work/wrk/pkgtools/cwrappers/work/.wrapper/tmp/arg-source
work/wrk/pkgtools/bootstrap-mk-files/work/bootstrap-mk-files-20170802/bsd.prog.mk
work/wrk/pkgtools/bootstrap-mk-files/work/.destdir/export/home/pkgsrc/2017Q3/share/mk/bsd.prog.mk
work/wrk/pkgtools/bootstrap-mk-files/work/.packages/bootstrap-mk-files-20170802.tgz
work/wrk/sysutils/bsdinstall/work/.work.log

On last line of work/wrk/sysutils/bsdinstall/work/.work.log, which might be
coming out of cwrappers:
<.>
/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/.gcc/bin/gcc
-m32 -v -D_FORTIFY_SOURCE=2 '-D_PATH_DEVNULL=\"/dev/null\"'
'-DTARGET_STRIP=\"/usr/ccs/bin/strip\"' -DHAVE_NBCOMPAT_H=1
-I/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-L/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat
-Wl,-rpath,/export/home/pkgsrc/2017Q3/lib conftest.c -D_FORTIFY_SOURCE=2
-fstack-protector
-I/export/home/pkgsrc/2017Q3/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/.buildlink/include

It is getting quite intricate at this point, so I'm hoping someone more
familiar might share a tip to progress or diagnosis.

- Andy Hooper