[meson] Use subdir_done to simplify test/api/meson.build
diff --git a/test/api/meson.build b/test/api/meson.build
index e40c015..a67a63c 100644
--- a/test/api/meson.build
+++ b/test/api/meson.build
@@ -1,86 +1,87 @@
-if conf.get('HAVE_GLIB', 0) == 1
-  tests = [
-    'test-aat-layout.c',
-    'test-baseline.c',
-    'test-blob.c',
-    'test-buffer.c',
-    'test-c.c',
-    'test-collect-unicodes.c',
-    'test-cplusplus.cc',
-    'test-common.c',
-    'test-draw.c',
-    'test-font.c',
-    'test-map.c',
-    'test-object.c',
-    'test-ot-color.c',
-    'test-ot-face.c',
-    'test-ot-glyphname.c',
-    'test-ot-ligature-carets.c',
-    'test-ot-name.c',
-    'test-ot-meta.c',
-    'test-ot-metrics.c',
-    'test-ot-tag.c',
-    'test-ot-extents-cff.c',
-    'test-ot-metrics-tt-var.c',
-    'test-set.c',
-    'test-shape.c',
-    'test-subset.c',
-    'test-subset-cmap.c',
-    'test-subset-drop-tables.c',
-    'test-subset-glyf.c',
-    'test-subset-hdmx.c',
-    'test-subset-hmtx.c',
-    'test-subset-nameids.c',
-    'test-subset-os2.c',
-    'test-subset-post.c',
-    'test-subset-vmtx.c',
-    'test-subset-cff1.c',
-    'test-subset-cff2.c',
-    'test-subset-gvar.c',
-    'test-subset-hvar.c',
-    'test-subset-vvar.c',
-    'test-subset-sbix.c',
-    'test-subset-gpos.c',
-    'test-subset-colr.c',
-    'test-subset-cbdt.c',
-    'test-unicode.c',
-    'test-var-coords.c',
-    'test-version.c',
-  ]
-
-  if conf.get('HAVE_FREETYPE', 0) == 1
-    tests += 'test-ot-math.c'
-  endif
-
-  if conf.get('HAVE_FREETYPE', 0) == 1 and conf.get('HAVE_PTHREAD', 0) == 1
-    tests += 'test-multithread.c'
-  endif
-
-  # Default test running environment
-  env = environment()
-  env.set('MALLOC_CHECK_', '2')
-  env.set('G_DEBUG', 'gc-friendly')
-  env.set('G_SLICE', 'always-malloc')
-  env.set('G_TEST_SRCDIR', meson.current_source_dir())
-  env.set('G_TEST_BUILDDIR', meson.current_build_dir())
-
-  foreach source : tests
-    test_name = source.split('.')[0]
-
-    link_withs = libharfbuzz
-    if test_name.contains('-subset')
-      link_withs = [libharfbuzz, libharfbuzz_subset]
-    elif test_name == 'test-unicode' and have_icu and not have_icu_builtin
-      link_withs = [libharfbuzz, libharfbuzz_icu]
-    endif
-
-    test(test_name, executable(test_name, source,
-      include_directories: [incconfig, incsrc],
-      dependencies: deps,
-      link_with: link_withs,
-      install: false,
-    ), env: env)
-  endforeach
-else
+if conf.get('HAVE_GLIB', 0) == 0
   message('You need to have glib support enabled to run test/api tests')
+  subdir_done()
 endif
+
+tests = [
+  'test-aat-layout.c',
+  'test-baseline.c',
+  'test-blob.c',
+  'test-buffer.c',
+  'test-c.c',
+  'test-collect-unicodes.c',
+  'test-cplusplus.cc',
+  'test-common.c',
+  'test-draw.c',
+  'test-font.c',
+  'test-map.c',
+  'test-object.c',
+  'test-ot-color.c',
+  'test-ot-face.c',
+  'test-ot-glyphname.c',
+  'test-ot-ligature-carets.c',
+  'test-ot-name.c',
+  'test-ot-meta.c',
+  'test-ot-metrics.c',
+  'test-ot-tag.c',
+  'test-ot-extents-cff.c',
+  'test-ot-metrics-tt-var.c',
+  'test-set.c',
+  'test-shape.c',
+  'test-subset.c',
+  'test-subset-cmap.c',
+  'test-subset-drop-tables.c',
+  'test-subset-glyf.c',
+  'test-subset-hdmx.c',
+  'test-subset-hmtx.c',
+  'test-subset-nameids.c',
+  'test-subset-os2.c',
+  'test-subset-post.c',
+  'test-subset-vmtx.c',
+  'test-subset-cff1.c',
+  'test-subset-cff2.c',
+  'test-subset-gvar.c',
+  'test-subset-hvar.c',
+  'test-subset-vvar.c',
+  'test-subset-sbix.c',
+  'test-subset-gpos.c',
+  'test-subset-colr.c',
+  'test-subset-cbdt.c',
+  'test-unicode.c',
+  'test-var-coords.c',
+  'test-version.c',
+]
+
+if conf.get('HAVE_FREETYPE', 0) == 1
+  tests += 'test-ot-math.c'
+endif
+
+if conf.get('HAVE_FREETYPE', 0) == 1 and conf.get('HAVE_PTHREAD', 0) == 1
+  tests += 'test-multithread.c'
+endif
+
+# Default test running environment
+env = environment()
+env.set('MALLOC_CHECK_', '2')
+env.set('G_DEBUG', 'gc-friendly')
+env.set('G_SLICE', 'always-malloc')
+env.set('G_TEST_SRCDIR', meson.current_source_dir())
+env.set('G_TEST_BUILDDIR', meson.current_build_dir())
+
+foreach source : tests
+  test_name = source.split('.')[0]
+
+  link_withs = libharfbuzz
+  if test_name.contains('-subset')
+    link_withs = [libharfbuzz, libharfbuzz_subset]
+  elif test_name == 'test-unicode' and have_icu and not have_icu_builtin
+    link_withs = [libharfbuzz, libharfbuzz_icu]
+  endif
+
+  test(test_name, executable(test_name, source,
+    include_directories: [incconfig, incsrc],
+    dependencies: deps,
+    link_with: link_withs,
+    install: false,
+  ), env: env)
+endforeach