[gdk-pixbuf: 1/2] meson: use an autotools compatible compatibility_version/current_version on macOS

[Emmanuele Bassi <ebassi src gnome org>]

commit df43643be2c8668ba4c1f7bb702ee32a78dc096a
Author: Christoph Reiter <creiter src gnome org>
Date:   Fri Nov 16 16:55:49 2018 +0100

    meson: use an autotools compatible compatibility_version/current_version on macOS
    
    Use the same versioning scheme as libtool did with the autotools build.
    Otherwise switching gdk-pixbuf from meson to autotools makes all libraries
    linking to it fail since the version is too low.

 meson.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 43b11f61a..96e72de84 100644
--- a/meson.build
+++ b/meson.build
@@ -42,6 +42,7 @@ revision = gdk_pixbuf_interface_age
 libversion = '@0@.@1@.@2@'.format(soversion, current, revision)
 age = gdk_pixbuf_binary_age - gdk_pixbuf_interface_age
 current_minus_age = current - age
+darwin_versions = ['@0@'.format(current + 1), '@0@.@1@'.format(current + 1, gdk_pixbuf_interface_age)]
 
 # Paths
 gdk_pixbuf_prefix = get_option('prefix')
@@ -179,7 +180,7 @@ endif
 
 if host_machine.system() == 'darwin'
   # Maintain compatibility with autotools on macOS
-  common_ldflags += [ '-compatibility_version 1', '-current_version 1.0', ]
+  common_ldflags += [ '-compatibility_version', darwin_versions[0], '-current_version', darwin_versions[1]]
   gdk_pixbuf_conf.set('OS_DARWIN', 1)
 endif