Only saw this once in nightly testing and couldn't reproduce it:
$ make -j 16
perl /data/runtests/work/sources/syncevolution/src/syncevo/readme2c.pl
/data/runtests/work/sources/syncevolution/README.rst
>src/syncevo/CmdlineHelp.c
/usr/bin/xsltproc -o src/dbus/interfaces/syncevo-server-doc.xml
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/spec-to-docbook.xsl
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/syncevo-server-full.xml
/usr/bin/xsltproc -o src/dbus/interfaces/syncevo-connection-doc.xml
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/spec-to-docbook.xsl
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/syncevo-connection-full.xml
/usr/bin/xsltproc -o src/dbus/interfaces/syncevo-session-doc.xml
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/spec-to-docbook.xsl
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/syncevo-session-full.xml
/usr/bin/glib-genmarshal
/data/runtests/work/sources/syncevolution/src/dbus/glib/syncevo-marshal.list
--header --prefix=syncevo_marshal > src/dbus/glib/syncevo-marshal.h
runtime error
xsltApplyStylesheet: saving to src/dbus/interfaces/syncevo-session-doc.xml may
not be possible
/usr/bin/xsltproc -o src/dbus/glib/syncevo-server.xml
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/spec-strip-docs.xsl
/data/runtests/work/sources/syncevolution/src/dbus/interfaces/syncevo-server-full.xml
runtime error
xsltApplyStylesheet: saving to src/dbus/interfaces/syncevo-server-doc.xml may
not be possible
make: *** [src/dbus/interfaces/syncevo-server-doc.xml] Error 9
make: *** Deleting file `src/dbus/interfaces/syncevo-server-doc.xml'
make: *** Waiting for unfinished jobs....
make: *** [src/dbus/interfaces/syncevo-session-doc.xml] Error 9
make: *** Deleting file `src/dbus/interfaces/syncevo-session-doc.xml'
Looks like multiple xsltproc commands ran in parallel and then stepped on each
others toes while creating the src/dbus/interfaces directory, which does not
exist after an out-of-tree configure.
To address the issue, serialize creating that directory by having make create
it as a prerequisite.
Nightly builds with --enable-doc tended to fail occassionally due to
download errors of the current docbook XSL from SourceForge. Using
a local copy of those files avoids that problem, speeds up compilation
and gives us some control over potentially incompatible changes
in the upstream docbook XSL.
All but toplevel Makefile.am are replaced with their non-recursive
counterparts. The generation of configure.in was removed (and thus
configure-{pre,post}.in are also removed) in favor of configure.ac
and m4 macros adding backend specific configure parts.
Version number is generated like in old build system.
There are still many things to improve, but for now there are no
immediate regressions. AUTOTOOLS-TODO contains a list of possible
improvements and fixes. AUTOTOOLS-TESTING contains what was tested
with current build system (configure flags, make options).
