[gobject-introspection/ebassi/issue-319: 17/20] build: Use warning_level=2

[Emmanuele Bassi <ebassi src gnome org>]

commit 637bd868ed85e031d1f51cebedbbb5df9b434629
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jun 2 11:38:01 2021 +0100

    build: Use warning_level=2
    
    Drop explicit `-Wall` and `-Wextra` from the compiler flags.
    
    Meson adds `-Wall` with `warning_level=1`, and `-Wextra` with
    `warning_level=2`.
    
    Fixes: #319

 meson.build | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/meson.build b/meson.build
index 6e6f556e..691863a7 100644
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@ project('gobject-introspection', 'c',
   version: '1.69.0',
   meson_version: '>= 0.55.3',
   default_options: [
-    'warning_level=1',
+    'warning_level=2',
     'buildtype=debugoptimized',
   ],
 )
@@ -28,12 +28,10 @@ cc = meson.get_compiler('c')
 project_c_args = []
 if cc.get_id() != 'msvc'
     project_c_args += [
-      '-Wall',
       '-Warray-bounds',
       '-Wcast-align',
       '-Wdeclaration-after-statement',
       '-Wduplicated-branches',
-      '-Wextra',
       '-Wformat=2',
       '-Wformat-nonliteral',
       '-Wformat-security',