[gcab: 1/2] meson: add proper macOS dylib versioning support

[Marc-André Lureau <malureau src gnome org>]

commit 94dc0cacbd25ce6e9a33018ad63247602653afb6
Author: Tom Schoonjans <Tom Schoonjans diamond ac uk>
Date:   Tue Oct 8 09:51:46 2019 +0100

    meson: add proper macOS dylib versioning support

 libgcab/meson.build | 1 +
 meson.build         | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/libgcab/meson.build b/libgcab/meson.build
index 3c4ac68..7da6c9a 100644
--- a/libgcab/meson.build
+++ b/libgcab/meson.build
@@ -41,6 +41,7 @@ libgcab = shared_library(
   ],
   soversion : lt_current,
   version : lt_version,
+  darwin_versions: darwin_versions,
   dependencies : [
     gio,
     libz,
diff --git a/meson.build b/meson.build
index 27077cf..547de63 100644
--- a/meson.build
+++ b/meson.build
@@ -16,6 +16,7 @@ lt_current = '0'
 lt_revision = '0'
 lt_age = '0'
 lt_version = '@0@.@1@.@2@'.format(lt_current, lt_age, lt_revision)
+darwin_versions = [lt_current.to_int() + 1, '@0@.@1@.0'.format(lt_current.to_int() + 1, lt_revision)]
 
 # get suported warning flags
 test_args = [