[gnome-desktop/mcatanzaro/version-script] Add a linker version script

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 41da17149d56963a6ad9c2edea0a9c4337d26402
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Thu Feb 21 00:03:21 2019 -0600

    Add a linker version script
    
    Life without -export-symbols-regex, the only useful libtool feature :(

 libgnome-desktop/meson.build | 6 ++++++
 libgnome-desktop/symbol.map  | 7 +++++++
 2 files changed, 13 insertions(+)
---
diff --git a/libgnome-desktop/meson.build b/libgnome-desktop/meson.build
index c365b448..fe6d03b1 100644
--- a/libgnome-desktop/meson.build
+++ b/libgnome-desktop/meson.build
@@ -82,12 +82,18 @@ gnome_desktop_deps = [
   seccomp_dep
 ]
 
+ldflags = []
+if cc.has_link_argument('-Wl,--version-script')
+  ldflags += '-Wl,--version-script=@0@'.format(meson.current_source_dir() / 'symbol.map')
+endif
+
 libgnome_desktop = library('gnome-desktop-3',
   libgnome_desktop_sources,
   dependencies: [gnome_desktop_deps, m_dep, rt_dep, x_dep],
   soversion: soversion,
   version: libversion,
   c_args: libargs,
+  link_args: ldflags,
   install: true
 )
 
diff --git a/libgnome-desktop/symbol.map b/libgnome-desktop/symbol.map
new file mode 100644
index 00000000..1b65ea31
--- /dev/null
+++ b/libgnome-desktop/symbol.map
@@ -0,0 +1,7 @@
+{
+global:
+  gnome_*;
+local:
+  *;
+};
+