Meson: Extract objects from convenience libraries to link them

This avoids the convenience library being treated as though it was
an installed static library (objects not included in the dependent
static library, and convenience library being listed in the pkg-config
metadata), both of which would make static linking impossible.
This is a workaround for meson not having
https://github.com/mesonbuild/meson/pull/3939 merged yet.

Fixes: https://gitlab.gnome.org/GNOME/glib/issues/1536
Signed-off-by: Simon McVittie <smcv@collabora.com>

gio/meson.build

@@ -351,6 +351,12 @@ local_sources = files(
 
 platform_deps = []
 internal_deps = []
+# TODO: internal_objects is a workaround for
+# <https://github.com/mesonbuild/meson/issues/3934> and
+# <https://github.com/mesonbuild/meson/issues/3937>. When we can depend
+# on a meson version where those are fixed, revert the commit that
+# introduced this workaround.
+internal_objects = []
 appinfo_sources = []
 contenttype_sources = []
 portal_sources = []
@@ -424,6 +430,7 @@ if host_system != 'windows'
 
   subdir('xdgmime')
   internal_deps += [xdgmime_lib]
+  internal_objects += [xdgmime_lib.extract_all_objects()]
 
   install_headers(gio_unix_include_headers, subdir : 'gio-unix-2.0/gio')
 
@@ -749,17 +756,20 @@ gioenumtypes_dep = declare_dependency(sources : [gioenumtypes_h])
 if glib_conf.has('HAVE_SYS_INOTIFY_H') and have_func_inotify_init1
   subdir('inotify')
   internal_deps += [ inotify_lib ]
+  internal_objects += [inotify_lib.extract_all_objects()]
 endif
 
 # kevent
 if have_func_kqueue and have_func_kevent
   subdir('kqueue')
   internal_deps += [ kqueue_lib ]
+  internal_objects += [kqueue_lib.extract_all_objects()]
 endif
 
 if host_system == 'windows'
   subdir('win32')
   internal_deps += [ giowin32_lib ]
+  internal_objects += [giowin32_lib.extract_all_objects()]
 endif
 
 if have_bash
@@ -784,11 +794,11 @@ endif
 libgio = library('gio-2.0',
   gioenumtypes_h, gioenumtypes_c, gnetworking_h, gio_sources,
   gio_dtrace_hdr, gio_dtrace_obj,
+  objects : internal_objects,
   version : library_version,
   soversion : soversion,
   install : true,
   include_directories : [configinc, gioinc],
-  link_with : internal_deps,
   #  '$(gio_win32_res_ldflag)',
   dependencies : [libz_dep, libdl_dep, libmount_dep, libglib_dep,
                   libgobject_dep, libgmodule_dep, selinux_dep, xattr_dep,

glib/meson.build

@@ -7,10 +7,18 @@ subdir('libcharset')
 if not use_system_pcre
   subdir('pcre')
 endif
+
+# TODO: gnulib_objects, pcre_objects and pcre_deps are a workaround for
+# <https://github.com/mesonbuild/meson/issues/3934> and
+# <https://github.com/mesonbuild/meson/issues/3937>. When we can depend
+# on a meson version where those are fixed, revert the commit that
+# introduced this workaround.
 if have_good_vsnprintf and have_good_snprintf
   gnulib_lib = []
+  gnulib_objects = []
 else
   subdir('gnulib')
+  gnulib_objects = [gnulib_lib.extract_all_objects()]
 endif
 
 glib_headers = files(
@@ -234,17 +242,25 @@ if use_pcre_static_flag
   pcre_static_args = ['-DPCRE_STATIC']
 endif
 
+if use_system_pcre
+  pcre_deps = [pcre]
+  pcre_objects = []
+else
+  pcre_deps = []
+  pcre_objects = [libpcre.extract_all_objects()]
+endif
+
 libglib = library('glib-2.0',
   glib_dtrace_obj, glib_dtrace_hdr,
   sources : [deprecated_sources, glib_sources],
+  objects : [charset_lib.extract_all_objects()] + gnulib_objects + pcre_objects,
   version : library_version,
   soversion : soversion,
   install : true,
   # intl.lib is not compatible with SAFESEH
   link_args : [noseh_link_args, glib_link_flags, win32_ldflags],
   include_directories : configinc,
-  link_with : [charset_lib, gnulib_lib],
-  dependencies : [pcre, thread_dep, libintl, librt] + libiconv + platform_deps,
+  dependencies : pcre_deps + [thread_dep, libintl, librt] + libiconv + platform_deps,
   c_args : ['-DG_LOG_DOMAIN="GLib"', '-DGLIB_COMPILATION'] + pcre_static_args + glib_hidden_visibility_args
 )