[gobject-introspection/ebassi/rebased-girffi-exec-fix: 5/8] Avoid leaking memory from FFI closure if no segfault risk

[Emmanuele Bassi <ebassi src gnome org>]

commit d81cad5ec57edb38f23b358c83e598c1609029a2
Author: Cimbali <me cimba li>
Date:   Mon Nov 1 19:31:58 2021 +0100

    Avoid leaking memory from FFI closure if no segfault risk

 girepository/girffi.c |  3 +++
 meson.build           | 14 ++++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)
---
diff --git a/girepository/girffi.c b/girepository/girffi.c
index 85165132..4cf139d0 100644
--- a/girepository/girffi.c
+++ b/girepository/girffi.c
@@ -494,4 +494,7 @@ g_callable_info_prepare_closure (GICallableInfo       *callable_info,
 void g_callable_info_free_closure (GICallableInfo *callable_info, ffi_closure *closure)
 {
   g_warning ("g_callable_info_free_closure is deprecated and leaks memory\n");
+#ifdef LEGACY_GIRFFI_FREE
+  g_callable_info_destroy_closure(callable_info, closure);
+#endif
 }
diff --git a/meson.build b/meson.build
index 65aa4b06..fc503b54 100644
--- a/meson.build
+++ b/meson.build
@@ -8,6 +8,7 @@ project('gobject-introspection', 'c',
 )
 
 host_system = host_machine.system()
+host_arch = host_machine.cpu_family()
 gi_versions = meson.project_version().split('.')
 build_root = meson.current_build_dir()
 source_root = meson.current_source_dir()
@@ -122,10 +123,6 @@ else
   gi_hidden_visibility_cflags += '-fvisibility=hidden'
 endif
 
-configure_file(
-  configuration: config,
-  output: 'config.h'
-)
 
 # FIXME: Always bumped to match our version
 #glib_version = '>=2.@0@.@1@'.format(gi_versions[1], gi_versions[2])
@@ -155,6 +152,15 @@ endif
 libffi_dep = dependency('libffi',
   fallback : ['libffi', 'ffi_dep'])
 
+if host_system == 'darwin' and host_arch == 'aarch64' or host_system == 'linux' and 
libffi_dep.version().version_compare('< 3.4')
+  config.set('LEGACY_GIRFFI_FREE', 1)
+endif
+
+configure_file(
+  configuration: config,
+  output: 'config.h'
+)
+
 # python headers
 cc.check_header('Python.h', dependencies: [python.dependency()], required: true)