On 27.02.2023 23:45, Ken Brown via Cygwin-apps wrote:
On 2/27/2023 4:41 PM, Brian Inglis via Cygwin-apps wrote:
Looks like the 4.4.1 release disables FIFO on Hurd and Cygwin.
Will be interesting to see if it is based on config test, for clues to
what it does not like, or just system?
In the case of HURD, it's because of failing tests in the test suite. In
the case of Cygwin, it's because of the problem I reported, in which
parallel make using a FIFO sometimes hangs when building TeX Live.
Anyone who wants to test this with their own builds can build make with
CPPFLAGS=-DJOBSERVER_USE_FIFO=1
That will re-enable the use a FIFO for the jobserver. One can then
force make to use a pipe on a given project by using the make option
--jobserver-style=pipe
I plan to do this myself, since I hope to debug the FIFO problem the
next time I see it. It's not easy to catch, because it doesn't happen
with every build of TeX Live. And when it does happen, the build has
typically been going on for close to two hours before it hangs.
but it could be
P.S. Marco, I don't know how much trouble you want to go to on this, but
when you release make-4.4.1, you might also make a test release with
CPPFLAGS set as above. That would make it easier for adventurous people
to try builds that use a FIFO.
uploaded 2 versions
4.4.1-1 default is built with CPPFLAGS=-DJOBSERVER_USE_FIFO=1
so it should behave like 4.4-1 previous build
4.4.1-2 test is vanilla build, so it should be built with pipe
the build logs are not very clear, so I need to dig more on them.
From my tests building qpdf, both are paralleling and maybe the
-2 is slight faster, but it could be due on machine load
real 19m38.493s
user 106m36.519s
sys 7m58.323s
real 18m51.680s
user 105m14.277s
sys 7m12.061s
Regards
Marco
