[gobject-introspection/wip/tingping/meson: 3/4] Declaration to export functions in girepository.dll/.lib, flag for skipping the build of the gir fil

[Patrick Griffis <pgriffis src gnome org>]

commit 37e16a4cf95e2b16b562689197bc5ac9b401cddd
Author: Danny 'Guru' Forghieri <daniele forghieri gmail com>
Date:   Wed Oct 25 23:10:57 2017 +0200

    Declaration to export functions in girepository.dll/.lib, flag for skipping the build of the gir files.

 meson.build       |   15 ++++++++++++---
 meson_options.txt |    4 ++++
 2 files changed, 16 insertions(+), 3 deletions(-)
---
diff --git a/meson.build b/meson.build
index 378ffcf..ba888e3 100644
--- a/meson.build
+++ b/meson.build
@@ -40,21 +40,30 @@ if cc.has_argument('-fvisibility=hidden')
     '-D_GI_EXTERN=__attribute__((visibility("default"))) extern',
     '-fvisibility=hidden',
   ]
+elif cc.get_id() == 'msvc'
+  gi_hidden_visibility_cflags = [
+        '-D_GI_EXTERN=__declspec (dllexport) extern',
+  ]
 endif
 
-gobject_dep = dependency('gobject-2.0', version: '>= 2.55.0')
+gobject_dep = dependency('gobject-2.0', version: '>= 2.52.0')
 gio_dep = dependency('gio-2.0')
 giounix_dep = dependency('gio-unix-2.0', required: false)
 gmodule_dep = dependency('gmodule-2.0')
 libffi_dep = dependency('libffi')
 
+gir_build = get_option('gir_build')
 subdir('girepository')
 subdir('tools')
 subdir('giscanner')
-subdir('gir')
+if gir_build
+  ### To do in a second time
+  subdir('gir')
+endif
 subdir('examples')
 subdir('docs')
-subdir('tests')
+### Missing meson.build file
+### subdir('tests')
 
 install_data('Makefile.introspection', install_dir: join_paths(get_option('datadir'), 
'gobject-introspection-1.0'))
 install_data('m4/introspection.m4', install_dir: join_paths(get_option('datadir'), 'aclocal'))
diff --git a/meson_options.txt b/meson_options.txt
index e9d21e9..3d113cb 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -9,3 +9,7 @@ option('doctool', type: 'boolean',
 option('glib-src-dir', type: 'string',
   description: 'Source directory for glib - needed to add docs to gir'
 )
+
+option('gir_build', type: 'boolean',
+  description: 'Windows: post build (gir) stuff'
+)