[gtkmm] Meson build: No implicit_include_directories

[Kjell Ahlstedt <kjellahl src gnome org>]

commit d82b538916dccc8c1e545102de382c2aef5758e5
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Apr 9 19:21:06 2021 +0200

    Meson build: No implicit_include_directories

 demos/gtk-demo/meson.build       | 1 +
 tests/meson.build                | 1 +
 tools/extra_defs_gen/meson.build | 2 ++
 3 files changed, 4 insertions(+)
---
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index 4645ca01..2fd9f84b 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -46,6 +46,7 @@ if epoxy_dep.found()
   executable('gtkmm-demo',
     gtkmm_demo_cc_files, demo_resources,
     dependencies: [gtkmm_own_dep, epoxy_dep],
+    implicit_include_directories: false,
     gui_app: true,
     build_by_default: build_demos,
     link_args: gui_app_ldflags,
diff --git a/tests/meson.build b/tests/meson.build
index 34fce284..d512c7d8 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -35,6 +35,7 @@ foreach ex : test_programs
 
   exe_file = executable(ex_name, ex_sources,
     dependencies: gtkmm_own_dep,
+    implicit_include_directories: false,
     gui_app: ex[3],
     build_by_default: build_tests,
     link_args: ex[3] ? gui_app_ldflags : [],
diff --git a/tools/extra_defs_gen/meson.build b/tools/extra_defs_gen/meson.build
index e853dee0..a6be88d3 100644
--- a/tools/extra_defs_gen/meson.build
+++ b/tools/extra_defs_gen/meson.build
@@ -16,11 +16,13 @@ endif
 
 executable('generate_defs_gdk', 'generate_defs_gdk.cc',
   dependencies: [gdkmm_build_dep, glibmm_generate_extra_defs_dep],
+  implicit_include_directories: false,
   install: false,
 )
 
 executable('generate_defs_gtk', 'generate_defs_gtk.cc',
   dependencies: [gtkmm_build_dep, glibmm_generate_extra_defs_dep],
+  implicit_include_directories: false,
   install: false,
 )