meson.build: Add more compilation warnings

So that we can catch more issues. The warning list is copied from GTK+,
with two switch related ones removed.

meson.build

@@ -270,6 +270,48 @@ endforeach
 
 add_project_arguments('-D_GNU_SOURCE', language: 'c')
 
+all_warnings = [
+  '-fno-strict-aliasing',
+  '-Wpointer-arith',
+  '-Wmissing-declarations',
+  '-Wimplicit-function-declaration',
+  '-Wformat=2',
+  '-Wformat-nonliteral',
+  '-Wformat-security',
+  '-Wstrict-prototypes',
+  '-Wmissing-prototypes',
+  '-Wnested-externs',
+  '-Wold-style-definition',
+  '-Wundef',
+  '-Wunused',
+  '-Wcast-align',
+  '-Wmissing-noreturn',
+  '-Wmissing-format-attribute',
+  '-Wmissing-include-dirs',
+  '-Wlogical-op',
+  '-Wignored-qualifiers',
+  '-Werror=redundant-decls',
+  '-Werror=implicit',
+  '-Werror=nonnull',
+  '-Werror=init-self',
+  '-Werror=main',
+  '-Werror=missing-braces',
+  '-Werror=sequence-point',
+  '-Werror=return-type',
+  '-Werror=trigraphs',
+  '-Werror=array-bounds',
+  '-Werror=write-strings',
+  '-Werror=address',
+  '-Werror=int-to-pointer-cast',
+  '-Werror=pointer-to-int-cast',
+  '-Werror=empty-body',
+  '-Werror=write-strings',
+]
+
+supported_warnings = cc.get_supported_arguments(all_warnings)
+
+add_project_arguments(supported_warnings, language: 'c')
+
 debug_c_args = []
 buildtype = get_option('buildtype')
 if buildtype.startswith('debug')