meson: support mono bindings building without cxx

Summary:
the mono bindings do depend partitially on the cxx bindings, eina_cxx
and eolian_cxx are needed, nothing more. With this commit you can build
mono without cxx.

fixes T8292

Reviewers: lauromoura

Reviewed By: lauromoura

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Maniphest Tasks: T8292

Differential Revision: https://phab.enlightenment.org/D10264

meson.build

@@ -440,16 +440,7 @@ if sys_windows == false
   subdir(join_paths('src', 'generic', 'emotion'))
 endif
 subdir('cmakeconfig')
-
-bindings = get_option('bindings')
-bindings_order = ['luajit', 'cxx', 'mono']
-
-foreach binding : bindings_order
-  if bindings.contains(binding)
-    subdir(join_paths('src', 'bindings', binding))
-  endif
-endforeach
-
+subdir(join_paths('src', 'bindings'))
 subdir(join_paths('src', 'edje_external'))
 subdir(join_paths('data'))
 

src/bindings/meson.build

@@ -0,0 +1,20 @@
+
+bindings = get_option('bindings')
+bindings_order = ['luajit', 'cxx', 'mono']
+
+if (bindings.contains('cxx') == false and bindings.contains('mono'))
+  subdirs = ['eina_cxx', 'eolian_cxx']
+  subdir(join_paths('cxx', 'eina_cxx'))
+  inc_dir = []
+  subdir(join_paths('cxx', 'eolian_cxx'))
+  eolian_cxx = declare_dependency(
+    include_directories: inc_dir,
+    dependencies : eolian
+  )
+endif
+
+foreach binding : bindings_order
+  if bindings.contains(binding)
+    subdir(join_paths( binding))
+  endif
+endforeach