Can't bootstrap pkgsrc-current on Solaris 10

Hi,

I wanted to test pkgsrc-current before 2018Q3. It seems pkgsrc-current is no more bootraping on Solaris 10 :

[root@zone3 bootstrap]$ tail -20 nohup.out
===> Overriding tools for bsdinstall-20160108
===> Extracting for bsdinstall-20160108
/usr/bin/rm -f /usr/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat/config.guess /usr/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat/config.sub
/usr/bin/ln -fs /usr/pkgsrc/mk/gnu-config/config.guess /usr/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat/config.guess
/usr/bin/ln -fs /usr/pkgsrc/mk/gnu-config/config.sub /usr/pkgsrc/bootstrap/work/wrk/sysutils/bsdinstall/work/libnbcompat/config.sub
===> Patching for bsdinstall-20160108
===> Creating toolchain wrappers for bsdinstall-20160108
===> Configuring for bsdinstall-20160108
=> Configuring and building libnbcompat
configure: error: cannot run /bin/sh ./config.sub
*** Error code 1
Stop.
bmake[1]: stopped in /usr/pkgsrc/sysutils/bsdinstall
*** Error code 1
Stop.
bmake: stopped in /usr/pkgsrc/sysutils/bsdinstall
===> exited with status 1
aborted.

Bootstrap command = env CC=/usr/sfw/bin/gcc CPP=/usr/sfw/bin/cpp CXX=/usr/sfw/bin/cpp CFLAGS='-O2' GCCBASE=/usr/sfw ./bootstrap --abi=64

GCC Version = gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath)

I know it's a very old GCC version. I will try to use a more recent gcc asap (and maybe sunpro). As far as I know 2018Q2 bootraped fine on Solaris 10.