Daniel, this is still a known bug in released versions of autotools, see
http://debbugs.gnu.org/13928 Best, Bert On Sun, Jun 12, 2016 at 9:22 AM, Daniel Pocock <dan...@pocock.pro> wrote: > > > According to the "Warning" in this page[1], it is not permitted to use > variables in _SOURCES. Is this deliberate or is it a bug? > > In our project, we started getting the warnings about subdir-objects and > so we added[2] > > AM_INIT_AUTOMAKE([foreign subdir-objects]) > > However, since that time the build has been failing[3] and it appears to > be because one module[4] is using a variable in _SOURCES > > The $PYCXX_SRCDIR variable is used to refer to the sources provided by > the PyCXX[5] library. PyCXX is not distributed as a compiled library > that can be linked against, the sources are simply placed under > /usr/share by the packages (e.g. on Debian[6]) and users have to compile > them into their projects by referring to them from their Makefile. > > What is the recommended way of using such sources in a build? I could > write some Makefile rule to copy or symlink the sources in to the tree, > but is there an official way to solve this with autotools? > > More specifically, I am using them like this: > > configure: > > ./configure ... \ > --with-python \ > PYCXX_SRCDIR=/usr/share/python2.7/CXX/Python2 > > > Makefile.am: > > nodist_libpyroute_la_SOURCES = $(PYCXX_SRCDIR)/cxxextensions.c > nodist_libpyroute_la_SOURCES += $(PYCXX_SRCDIR)/cxx_extensions.cxx > nodist_libpyroute_la_SOURCES += $(PYCXX_SRCDIR)/cxxsupport.cxx > nodist_libpyroute_la_SOURCES += > $(PYCXX_SRCDIR)/../IndirectPythonInterface.cxx > > > > > 1. https://autotools.io/automake/nonrecursive.html > 2. > https://github.com/resiprocate/resiprocate/commit/fb37bc86db9f1b7d569eb2a17acd1e683b6ce55f > 3. https://travis-ci.org/resiprocate/resiprocate/builds/131873177 > 4. > https://github.com/resiprocate/resiprocate/blob/master/repro/plugins/pyroute/Makefile.am > 5. http://cxx.sourceforge.net/ > 6. > https://packages.debian.org/search?searchon=contents&keywords=cxxextensions.c&mode=path&suite=stable&arch=any > >
