'pkglibexecdir' is not a legitimate directory

[Itamar Gal]

Hey autoconf folks,

I'm following some outdated instructions in an attempt to compile some
proprietary, closed-source, unsupported, legacy code. Here is what a
typical shell session looks like:

$ autoreconf -fi

src/Makefile.am:7: error: 'pkglibexecdir' is not a legitimate
directory for 'PYTHON'
autoreconf: automake failed with exit status: 1


$ cat src/Makefile.am

pkglibexecdir = $(libexecdir)/packagename

nobase_pkglibexec_PYTHON = \
        python_module_1.py
        python_module_2.py
        [...]

MAINTAINERCLEANFILES = Makefile.in
BUILT_SOURCES = some_source

some_source:
    ln -s ../lib/python/some_source some_source


I'm using GNU Autoconf 2.69 on CentOS 7. I'm also having similar issues
with other packages in the same project. I'm assuming that there's a quick
fix for this problem but I'm not very comfortable with autotools and most
of what I've found via google hasn't made a lot of sense to me. Any advice
would be greatly appreciated!

Cheers,
Itamar

P.S. I've also posted this question on stackexchange, so I'm including a
link here in case someone wants to go claim credit for their solution (I'm
not sure what the etiquette is on cross-posting to mailing lists):

http://unix.stackexchange.com/questions/219152/pkglibexecdir-is-not-a-legitimate-directory