[glib/1536-link-whole] Meson: Extract objects from convenience libraries to link them

[Simon McVittie <smcv src gnome org>]

commit 62af03bda8a1d649b079a0e77d3687695d0ab7d3
Author: Simon McVittie <smcv collabora com>
Date:   Tue Sep 25 08:58:25 2018 +0100

    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  | 12 +++++++++++-
 glib/meson.build | 20 ++++++++++++++++++--
 2 files changed, 29 insertions(+), 3 deletions(-)
---
diff --git a/gio/meson.build b/gio/meson.build
index 04581b1cc..7f2c08e30 100644
--- a/gio/meson.build
+++ b/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,
diff --git a/glib/meson.build b/glib/meson.build
index ea568b941..6fc56da7c 100644
--- a/glib/meson.build
+++ b/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
 )