[balsa] Make '-lz' a dependency, not a global link arg

[Peter Bloomfield <peterb src gnome org>]

commit 049f0a29782b62436f425565e6d0f7aedfe5f7f0
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Wed Sep 20 12:33:41 2017 -0400

    Make '-lz' a dependency, not a global link arg
    
        Pass '-lz' link argument as a dependency of libimap instead of through
        add_global_link_arguments
    
        * libbalsa/imap/meson.build: add the dependency.
        * meson.build: do not use add_global_link_arguments.

 ChangeLog                 |    8 ++++++++
 libbalsa/imap/meson.build |    3 ++-
 meson.build               |    3 ---
 3 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index ddca3a6..c30e365 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2017-09-20  Peter Bloomfield  <pbloomfield bellsouth net>
 
+       Pass '-lz' link argument as a dependency of libimap instead of through
+       add_global_link_arguments
+
+       * libbalsa/imap/meson.build: add the dependency.
+       * meson.build: do not use add_global_link_arguments.
+
+2017-09-20  Peter Bloomfield  <pbloomfield bellsouth net>
+
        Use 'glib-genmarshal --header --body' to generate marshal.c
        files, instead of catting a header line to the file
 
diff --git a/libbalsa/imap/meson.build b/libbalsa/imap/meson.build
index eb6345c..9dfcece 100644
--- a/libbalsa/imap/meson.build
+++ b/libbalsa/imap/meson.build
@@ -29,7 +29,8 @@ libimap_compile_args = ['-I' + meson.build_root(),
                         '-I' + join_paths(meson.source_root(), 'libnetclient'),
                         '-I' + join_paths(meson.source_root(), 'libbalsa', 'imap'),
                         '-ansi']
-libimap_compile_dep  = declare_dependency(compile_args : libimap_compile_args)
+libimap_compile_dep  = declare_dependency(compile_args : libimap_compile_args,
+                                          link_args    : '-lz')
 
 # genmarshal
 #
diff --git a/meson.build b/meson.build
index e539910..fb70a68 100644
--- a/meson.build
+++ b/meson.build
@@ -143,9 +143,6 @@ conf.set('TOOLKIT_CATEGORIES', TOOLKIT_CATEGORIES)
 # Libraries.
 # #####################################################################
 
-# Make sure ld finds zlib:
-add_global_link_arguments('-lz', language : 'c')
-
 # Dependencies for balsa and balsa_ab:
 glib_dep    = dependency('glib-2.0', version : '>= 2.40.0')
 gtk_dep     = dependency('gtk+-3.0', version : '>= 3.10.0')