Created attachment 146621 [details] [review]
Patch fixing the problem

When building pango in parallel (i.e. with the -j flag), there is a good chance
the build will fail in the pango-view subdir. This is because the all target
tries to build both "$(srcdir)/pango-view.1" and "pango-view$(EXEEXT)" in
parallel, but the former has a command "$(MAKE) $(AM_MAKEFLAGS)
pango-view$(EXEEXT)" which triggers a second make process building the same
target.

Encountered on Gentoo Linux: http://bugs.gentoo.org/287825

The fix is quite simple: add pango-view$(EXEEXT) as a proper dependency of
$(srcdir)/pango-view.1, instead of starting a separate make for it. I guess you
can then even stop depending directly on $(pango_view_SOURCES), as
pango-view$(EXEEXT) should do so, providing suitable indirect dependencies.