[gobject-introspection/fix-c4098-warnings] build: Defer check for msvc_recommended_pragmas.h

[Chun-wei Fan <fanchunwei src gnome org>]

commit 469c46f20b6a2a63ff43527a8346accb89a19a1c
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Mar 10 18:27:07 2022 +0800

    build: Defer check for msvc_recommended_pragmas.h
    
    This attempts to ensure that even if we are building GLib as a subproject, we
    can force-include msvc_recommended_pragmas.h on Visual Studio builds so that
    we can catch compiler warnings that we want to watch out for during the build.

 meson.build | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/meson.build b/meson.build
index 7a7704b1..d0ea44ea 100644
--- a/meson.build
+++ b/meson.build
@@ -65,10 +65,7 @@ if cc.get_id() != 'msvc'
       '-fno-strict-aliasing',
     ]
 else
-    project_c_args += [
-      '-FImsvc_recommended_pragmas.h',
-      '-utf-8',
-    ]
+    project_c_args += [ '-utf-8' ]
 endif
 
 project_c_args = cc.get_supported_arguments(project_c_args)
@@ -136,6 +133,14 @@ gio_dep = dependency('gio-2.0', version : glib_version,
   fallback: ['glib', 'libgio_dep'])
 gmodule_dep = dependency('gmodule-2.0', version : glib_version,
   fallback: ['glib', 'libgmodule_dep'])
+
+# Ensure we are able to force-include msvc_recommended_pragmas.h on MSVC
+if cc.get_id() == 'msvc'
+  add_project_arguments(
+    cc.get_supported_arguments('-FImsvc_recommended_pragmas.h'),
+    language: 'c'
+  )
+endif
 if host_system != 'windows'
   giounix_dep = dependency('gio-unix-2.0', version : glib_version,
     fallback: ['glib', 'libgiounix_dep'])