0.3.6 + all up to b62c902d: parallel documentation build fails

[kloczek]

When make -j1 -C docs is used everything is fine

Making all in docs
make[2]: *** No rule to make target 'afIdentifyNamedFD.3', needed by 'all-am'.  Stop.
make[2]: *** Waiting for unfinished jobs....
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afNewFileSetup.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afGetFrameSize.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afInitAESChannelDataTo.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afCloseFile.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afReadFrames.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afSeekFrame.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afSetErrorHandler.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afGetFrameCount.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afWriteFrames.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afIdentifyFD.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afOpenFile.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afSetVirtualSampleFormat.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afReadMisc.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afInitCompression.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afInitFileFormat.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" sfinfo.1.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afInitSampleFormat.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" sfconvert.1.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[2]: Entering directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
/usr/bin/a2x -arevnumber=0.3.6 -amansource="Audio File Library" -d manpage -f manpage --asciidoc-opts="-f asciidoc.conf" afQuery.3.txt
make[2]: Leaving directory '/home/tkloczko/rpmbuild/BUILD/audiofile-audiofile-0.3.6/docs'
make[1]: *** [Makefile:487: all-recursive] Error 1
make: *** [Makefile:392: all] Error 2