meson: Fix CFLAGS use by using add_project_arguments

It seems that meson will not always apply the CFLAGS as defined through
the environment if "c_args=" is used in the default_options array for
the project() call.

Switching to add_project_arguments solves this problem.

See https://github.com/mesonbuild/meson/issues/8037

meson.build

@@ -5,45 +5,6 @@ project('fprintd', 'c',
         'buildtype=debugoptimized',
         'warning_level=1',
         'c_std=gnu99',
-        'c_args=' + ' '.join([
-            '-fno-strict-aliasing',
-            '-Wall',
-            '-Wcast-align',
-            '-Werror=address',
-            '-Werror=array-bounds',
-            '-Werror=empty-body',
-            '-Werror=implicit',
-            '-Werror=init-self',
-            '-Werror=int-to-pointer-cast',
-            '-Werror=main',
-            '-Werror=missing-braces',
-            '-Werror=nonnull',
-            '-Werror=pointer-to-int-cast',
-            '-Werror=redundant-decls',
-            '-Werror=return-type',
-            '-Werror=sequence-point',
-            '-Werror=trigraphs',
-            '-Werror=write-strings',
-            '-Wformat-nonliteral',
-            '-Wformat-security',
-            '-Wformat=2',
-            '-Wignored-qualifiers',
-            '-Wimplicit-function-declaration',
-            '-Wlogical-op',
-            '-Wmissing-declarations',
-            '-Wmissing-format-attribute',
-            '-Wmissing-include-dirs',
-            '-Wmissing-noreturn',
-            '-Wmissing-prototypes',
-            '-Wnested-externs',
-            '-Wold-style-definition',
-            '-Wpointer-arith',
-            '-Wshadow',
-            '-Wstrict-prototypes',
-            '-Wtype-limits',
-            '-Wundef',
-            '-Wunused',
-        ]),
     ],
     meson_version: '>= 0.50.0')
 
@@ -51,6 +12,47 @@ gnome = import('gnome')
 i18n = import('i18n')
 
 cc = meson.get_compiler('c')
+common_cflags = cc.get_supported_arguments([
+    '-fno-strict-aliasing',
+    '-Wall',
+    '-Wcast-align',
+    '-Werror=address',
+    '-Werror=array-bounds',
+    '-Werror=empty-body',
+    '-Werror=implicit',
+    '-Werror=init-self',
+    '-Werror=int-to-pointer-cast',
+    '-Werror=main',
+    '-Werror=missing-braces',
+    '-Werror=nonnull',
+    '-Werror=pointer-to-int-cast',
+    '-Werror=redundant-decls',
+    '-Werror=return-type',
+    '-Werror=sequence-point',
+    '-Werror=trigraphs',
+    '-Werror=write-strings',
+    '-Wformat-nonliteral',
+    '-Wformat-security',
+    '-Wformat=2',
+    '-Wignored-qualifiers',
+    '-Wimplicit-function-declaration',
+    '-Wlogical-op',
+    '-Wmissing-declarations',
+    '-Wmissing-format-attribute',
+    '-Wmissing-include-dirs',
+    '-Wmissing-noreturn',
+    '-Wmissing-prototypes',
+    '-Wnested-externs',
+    '-Wold-style-definition',
+    '-Wpointer-arith',
+    '-Wshadow',
+    '-Wstrict-prototypes',
+    '-Wtype-limits',
+    '-Wundef',
+    '-Wunused',
+])
+add_project_arguments(common_cflags, language: 'c')
+
 host_system = host_machine.system()
 glib_min_version = '2.56'
 libfprint_min_version = '1.90.1'