[tlbuild] openbsd-current build problem

[Benjamin Scher Purcell]

I was building texlive from ftp://tug.org/historic/systems/texlive/2013/texlive-20130530-source.tar.xz and ran into the following problem:

$ env TL_MAKE=gmake ./Build --debug --disable-xindy
...
/usr/lib/gcc-lib/amd64-unknown-openbsd5.4/4.2.1/libgcc.a(unwind-dw2-fde-openbsd.o)(.text+0x19d5):./gthr-default.h:608: undefined reference to `pthread_mutex_lock'
/usr/lib/gcc-lib/amd64-unknown-openbsd5.4/4.2.1/libgcc.a(unwind-dw2-fde-openbsd.o)(.text+0xe7): In function `__register_frame_info_bases':
./gthr-default.h:626: undefined reference to `pthread_mutex_unlock'
/usr/lib/gcc-lib/amd64-unknown-openbsd5.4/4.2.1/libgcc.a(unwind-dw2-fde-openbsd.o)(.text+0x12ee): In function `__register_frame_info_table_bases':
./gthr-default.h:626: undefined reference to `pthread_mutex_unlock'
collect2: ld returned 1 exit status
gmake[4]: *** [bibtexu] Error 1
gmake[4]: Leaving directory `/home/bsp/src/texlive-20130530-source/Work/texk/bibtex-x'
gmake[3]: *** [all] Error 2


Any ideas for a work-around? 

Thank you!

Benn