The way the configure script determines the version of libwmf is by temporarily
making dots separator characters, but since the file name of the program which
returns the version contains dots in Guix (the version in the store entry name),
doing it this way will always fail.

This is a simple guix-specific fix for the problem.

--- a/configure	2010-06-13 23:17:37.000000000 +0200
+++ b/configure	2014-09-08 17:31:52.102371800 +0200
@@ -21140,13 +21140,11 @@
 $as_echo "$as_me: WARNING: wmf plugin: program libwmf-config not found in path" >&2;}
 		fi
 	else
-		IFS_old="$IFS"
-		IFS='.'
-		set -- `$libwmfconfig --version`
-		libwmf_major_found="${1}"
-		libwmf_minor_found="${2}"
-		libwmf_micro_found="${3}"
-		IFS="$IFS_old"
+		libwmf_fullver_found=`$libwmfconfig --version`
+		libwmf_major_found=$(echo $libwmf_fullver_found |  cut -d . -f 1)
+		libwmf_minor_found=$(echo $libwmf_fullver_found |  cut -d . -f 2)
+		libwmf_micro_found=$(echo $libwmf_fullver_found |  cut -d . -f 3)
+
 		if test "$libwmf_major_found" -gt "$libwmf_major_req"; then
 			wmf_deps="yes"
 		elif test "$libwmf_major_found" -eq "$libwmf_major_req" &&
ss='active' href='/guix/log/tests/sets.scm'>log</a><a href='/guix/tree/tests/sets.scm?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>tree</a><a href='/guix/commit/tests/sets.scm?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>commit</a><a href='/guix/diff/tests/sets.scm?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/sets.scm'>
<input type='hidden' name='id' value='200ddf3aa3aad53786c0a124ab52f9ffff73dc34'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>root</a>/<a href='/guix/log/tests?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>tests</a>/<a href='/guix/log/tests/sets.scm?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34'>sets.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/sets.scm?id=200ddf3aa3aad53786c0a124ab52f9ffff73dc34&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2016-04-03 14:19:09 +0200'>2016-04-03</span></td><td><a href='/guix/commit/tests/sets.scm?id=a9edb211e733b8b34e67ec3b4450567e9376986f'>build: Add a Guile custom test driver using SRFI-64.</a><span class='msg-avail'>...<span class='msg-tooltip'>Before that '.log' files for scheme tests were fragmented and not
included in test-suite.log.  This unifies the semantics of SRFI-64 API
with Automake test suite.

* build-aux/test-driver.scm: New file.
* Makefile.am (SCM_LOG_DRIVER, AM_SCM_LOG_DRIVER_FLAGS): New variables.
(SCM_LOG_COMPILER, AM_SCM_LOG_FLAGS): Delete variables.
(AM_TESTS_ENVIRONMENT): Set GUILE_AUTO_COMPILE to 0.
* test-env.in: Silence guix-daemon.
* doc/guix.texi (Running the Test Suite): Describe how to display the
detailed results.  Bug reports require only 'test-suite.log' file.
* tests/base32.scm, tests/build-utils.scm, tests/builders.scm,
tests/challenge.scm, tests/cpan.scm, tests/cpio.scm, tests/cran.scm,
tests/cve.scm, tests/derivations.scm, tests/elpa.scm,
tests/file-systems.scm, tests/gem.scm, tests/gexp.scm,
tests/gnu-maintenance.scm, tests/grafts.scm, tests/graph.scm,
tests/gremlin.scm, tests/hackage.scm, tests/hash.scm,
tests/import-utils.scm, tests/lint.scm, tests/monads.scm, tests/nar.scm,
tests/packages.scm, tests/pk-crypto.scm, tests/pki.scm,
tests/profiles.scm, tests/publish.scm, tests/pypi.scm,
tests/records.scm, tests/scripts-build.scm, tests/scripts.scm,
tests/services.scm, tests/sets.scm, tests/size.scm, tests/snix.scm,
tests/store.scm, tests/substitute.scm, tests/syscalls.scm,
tests/system.scm, tests/ui.scm, tests/union.scm, tests/upstream.scm,
tests/utils.scm: Don't exit at the end of test groups.
* tests/containers.scm: Likewise.  Use 'test-skip' instead of exiting
with error code 77.
</span></span></td><td>Mathieu Lirzin</td></tr>