[PPL-devel] [lucas at lucas-nussbaum.net: Bug#552959: ppl: FTBFS: build blocks]

[Michael Tautschnig]

> Michael Tautschnig wrote:
> >I was notified about some very strange build failure that I cannot reproduce
> >myself, but apparently for Lucas it _is_ reproducible. Have you by chance already
> >come across this problem, or have some idea what could be the problem, or maybe
> >even have a fix already in git?
> 
> Hi Michael,
> 
> this week we are all busy, but next week we will look in to this.
> Can you give us all the information required to try to reproduce
> the problem (which version of Debian, which architecture,
> which version of SWI-Prolog, ...).  Please forgive me if that
> information is already present somewhere in the attachment
> you sent... as I said, this week we are snowed under.
> All the best,
> 

Sorry for responding this late; the versions should be as follows:

- Debian sid/unstable
- Builds running on amd64
- SWI-Prolog version 5.6.64

Now I'm building ppl on such systems as well, so I'm really puzzled about this.
The full build log is available at [1]. What seems noteworthy to me is:

- make is run with -j10, meaning highly parallel.
- The first invocation of ppl_pl seems to block; now I didn't look into the
  corresponding makefiles yet, but could it be some simple dependency problem
  that only occurs upon parallel builds? The blocking part is the ppl_pl
  execution around here:

make[7]: Entering directory `/build/user-ppl_0.10.2-3-amd64-s4Cp4e/ppl-0.10.2/interfaces/Prolog/SWI'
if [ . != `pwd` ]; then \
    cp -f ./../tests/pl_check.pl . ; \
  fi ;\
        echo "ensure_loaded('./swi_pl_check'). main." > script_pchk
/bin/bash ../../../libtool --mode=execute \
    -dlopen ../../../src/libppl.la \
    -dlopen ../../../Watchdog/src/libpwl.la \
    -dlopen libppl_swiprolog.la \
                 ./ppl_pl < script_pchk


HTH,
Michael

[1] http://people.debian.org/~lucas/logs/2009/10/28/ppl_0.10.2-3_lsid64.buildlog

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