Add a CI test to make sure we can always link to fwupdplugin

Based on a patch from Simon McVittie on
https://salsa.debian.org/efi-team/fwupd/-/merge_requests/4

Suggested-by: Simon McVittie <smcv@debian.org>

contrib/ci/arch.sh

@@ -37,6 +37,10 @@ pacman -Syu --noconfirm qt5-base
 meson qt5-thread-test ../contrib/ci/qt5-thread-test
 ninja -C qt5-thread-test test
 
+#run the CI tests for making sure we can link fwupd/fwupdplugin
+meson out-of-tree-link ../contrib/ci/out-of-tree-link
+ninja -C out-of-tree-link test
+
 # move the package to working dir
 mv *.pkg.* ../dist
 

contrib/ci/out-of-tree-link/.gitignore

@@ -0,0 +1 @@
+build

contrib/ci/out-of-tree-link/fwupd.c

@@ -0,0 +1,10 @@
+#undef NDEBUG
+#include <assert.h>
+
+#include <fwupd.h>
+
+int main (void)
+{
+    assert (fwupd_error_to_string (FWUPD_ERROR_NOTHING_TO_DO) != NULL);
+    return 0;
+}

contrib/ci/out-of-tree-link/fwupdplugin.c

@@ -0,0 +1,10 @@
+#undef NDEBUG
+#include <assert.h>
+
+#include <fwupdplugin.h>
+
+int main (void)
+{
+    assert (fu_common_vercmp_full ("1.0", "2.1", FWUPD_VERSION_FORMAT_NUMBER) < 0);
+    return 0;
+}

contrib/ci/out-of-tree-link/meson.build

@@ -0,0 +1,27 @@
+  project('out-of-tree-link', 'c',
+  license : 'LGPL-2.1+',
+)
+fwupd = dependency('fwupd')
+fwupdplugin = dependency('fwupdplugin')
+env = environment()
+env.set('G_DEBUG', 'fatal-criticals')
+e = executable(
+  'fwupd',
+  sources : [
+    'fwupd.c'
+  ],
+  dependencies : [
+    fwupd
+  ],
+  )
+test('fwupd', e, timeout: 60, env: env)
+e = executable(
+  'fwupdplugin',
+  sources : [
+    'fwupdplugin.c'
+  ],
+  dependencies : [
+    fwupdplugin
+  ],
+  )
+test('fwupdplugin', e, timeout: 60, env: env)