[tlbuild] diagnosis of the missing -lpthreads problem

[Nelson H. F. Beebe]

I've now done a fresh build of the texlive-20160423 snapshot on
OpenBSD 5.9, without adding -lpthreads to all of the Makefiles.  Each
time the build failed with missing pthread symbols, I stepped to that
directory and added that library in front of -lm in the Makefile, then
restarted the build.

On completion, only these executables now refer to the pthread libraries:

	libpthread		bibtexu upmendex

	libpthread-stubs	inimf mf mflua mflua-nowin mfluajit \
				mfluajit-nowin pdfclose pdfopen \
				xdvi-xaw xelatex xelollipop xetex

The binary distribution tree at

	http://www.math.utah.edu/pub/texlive/bin

now has the latest build for OpenBSD 5.9 on x86-64.

Here are the directories where I had to modify Makefiles:

	% find Work -name Makefile | sort | xargs grep -l -e -lpthread
	Work/libs/harfbuzz/Makefile
	Work/libs/icu/Makefile
	Work/libs/icu/icu-build/extra/scrptrun/Makefile
	Work/libs/icu/icu-build/samples/layout/Makefile
	Work/texk/bibtex-x/Makefile
	Work/texk/upmendex/Makefile

If the source configure.{ac,in} and/or Makefile.in files associated
with those directories could be corrected in the TeX Live 2016 master
source tree, this mess could be repaired, and manual intervention
would not be needed.

I prefer not to make such patches myself, because I have plenty to do
already.

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- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: beebe at math.utah.edu  -
- 155 S 1400 E RM 233                       beebe at acm.org  beebe at computer.org -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
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