build: Add project arguments

Add language specific project arguments and ensure that -Werror is
enabled, enforcing code to be as clean as possible.

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

meson.build

@@ -2,6 +2,19 @@ project('libcamera - supporting complex camera pipelines', 'c', 'cpp',
   version : '0.1',
   license : 'LGPL 2.1+')
 
+common_arguments = [
+    '-Wall',
+    '-Wextra',
+    '-Werror',
+    '-Wno-unused-parameter',
+]
+
+c_arguments = common_arguments
+cpp_arguments = common_arguments
+
+add_project_arguments(c_arguments, language: 'c')
+add_project_arguments(cpp_arguments, language: 'cpp')
+
 inc = include_directories('include')
 
 subdir('include')