[libglnx/wip/smcv/subproject: 3/5] tests: Build libglnx-testlib as a separate static library

[Simon McVittie <smcv src gnome org>]

commit c500c362b85ad8119a6f07d91e47166c997753c9
Author: Simon McVittie <smcv collabora com>
Date:   Thu Apr 21 18:33:18 2022 +0100

    tests: Build libglnx-testlib as a separate static library
    
    One of Flatpak's unit tests uses this, for _GLNX_TEST_SCOPED_TEMP_DIR.
    Its API is not really stable, but libglnx is a "copylib" anyway, so
    none of it has (or needs) a strictly stable API.
    
    Signed-off-by: Simon McVittie <smcv collabora com>

 tests/meson.build | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index 2ad8c44..555009f 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -2,6 +2,25 @@
 # Copyright 2019 Collabora Ltd.
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
+libglnx_testlib = static_library(
+  'glnx-testlib',
+  'libglnx-testlib.c',
+  'libglnx-testlib.h',
+  dependencies : [
+    libglnx_dep,
+    libglnx_deps,
+  ],
+  install : false,
+)
+libglnx_testlib_dep = declare_dependency(
+  dependencies : [
+    libglnx_dep,
+    libglnx_deps,
+  ],
+  include_directories : include_directories('.'),
+  link_with : libglnx_testlib,
+)
+
 test_names = [
   'errors',
   'fdio',
@@ -13,13 +32,12 @@ test_names = [
 foreach test_name : test_names
   exe = executable(test_name,
     [
-      'libglnx-testlib.c',
-      'libglnx-testlib.h',
       'test-libglnx-' + test_name + '.c',
     ],
     dependencies: [
       libglnx_dep,
       libglnx_deps,
+      libglnx_testlib_dep,
     ],
   )
   test(test_name, exe)