[gtk/wip/chergert/quartz4u: 135/146] build: fix export-dynamic on macos

[Christian Hergert <chergert src gnome org>]

commit 64e5bf4f526dda537dfddb8e34e253285e9970f7
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jun 18 12:02:24 2020 -0700

    build: fix export-dynamic on macos
    
    This really should be detected instead, but this works for now.

 testsuite/gtk/meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/testsuite/gtk/meson.build b/testsuite/gtk/meson.build
index 5946f7cfda..23843baa54 100644
--- a/testsuite/gtk/meson.build
+++ b/testsuite/gtk/meson.build
@@ -4,7 +4,11 @@ testdatadir = join_paths(installed_test_datadir, 'gtk')
 gtk_tests_export_dynamic_ldflag = []
 
 if cc.get_id() != 'msvc'
-  gtk_tests_export_dynamic_ldflag = ['-Wl,--export-dynamic']
+  if os_darwin
+    gtk_tests_export_dynamic_ldflag = ['-Wl,-export_dynamic']
+  else
+    gtk_tests_export_dynamic_ldflag = ['-Wl,--export-dynamic']
+  endif
 endif
 
 tests = [