Since libnm-wwan.so is not just a loadable module but also a shared library
that some plugin links against, build it as a shared library while avoiding
'-Wl,--no-undefined':

  https://github.com/mesonbuild/meson/issues/9492#issuecomment-973117289

diff --git a/src/core/devices/wwan/meson.build b/src/core/devices/wwan/meson.build
index 37ef738..18ac54f 100644
--- a/src/core/devices/wwan/meson.build
+++ b/src/core/devices/wwan/meson.build
@@ -4,8 +4,9 @@ wwan_inc = include_directories('.')
 
 linker_script = join_paths(meson.current_source_dir(), 'libnm-wwan.ver')
 
-libnm_wwan = shared_module(
+libnm_wwan = shared_library(
   'nm-wwan',
+  override_options: ['b_lundef=false'],
   sources: files(
   'nm-service-providers.c',
   'nm-modem-broadband.c',
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<div class='path'>path: <a href='/guix/log/?id=c76d0dbcba5ecce041506cc46be42be97a4f300c'>root</a>/<a href='/guix/log/gnu?id=c76d0dbcba5ecce041506cc46be42be97a4f300c'>gnu</a>/<a href='/guix/log/gnu/services?id=c76d0dbcba5ecce041506cc46be42be97a4f300c'>services</a>/<a href='/guix/log/gnu/services/getmail.scm?id=c76d0dbcba5ecce041506cc46be42be97a4f300c'>getmail.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/gnu/services/getmail.scm?id=c76d0dbcba5ecce041506cc46be42be97a4f300c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-10-18 07:53:55 +0000'>2019-10-18</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=99190575a0a37115a11e561ae8a9bbdb5398dfd8'>Fix documentation of delete_after in the getmail service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix.texi (Getmail service): Remove the word `not'.
* gnu/services/getmail.scm (getmail-options-configuration): Ditto.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2019-05-31 20:22:20 +0100'>2019-05-31</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=f6b0e1f8ff6a6459d7d39238ced165f4caa988fe'>services: Add getmail.</a><span class='msg-avail'>...<span class='msg-tooltip'>Getmail is a mail retriever written in Python, this commit adds a service-type
to run getmail. I'm looking at this, as it's a convinient way of getting
mailing list messages in to Patchwork.

I initially tried putting this in the (gnu services mail) module, but due to
also trying to use the define-configuration pattern, it conflicted with the
dovecot service.

* gnu/services/getmail.scm: New file.
* gnu/local.mk: Add it.
* gnu/tests/mail.scm (%getmail-os, %test-getmail): New variables.
(run-getmail-test): New procedure.
</span></span></td><td>Christopher Baines</td></tr>