Add support for toggleable warnings

include/asm/warning.h

@@ -0,0 +1,52 @@
+#ifndef WARNING_H
+#define WARNING_H
+
+extern unsigned int nbErrors;
+
+enum WarningID {
+	WARNING_USER,
+	WARNING_OBSOLETE,
+	WARNING_BUILTIN_ARG,
+	WARNING_LARGE_CONSTANT,
+	WARNING_SHIFT,
+	WARNING_DIV,
+	WARNING_EMPTY_ENTRY,
+	WARNING_LONG_STR,
+
+	NB_WARNINGS,
+
+	/* Warnings past this point are "meta" warnings */
+	WARNING_ALL = NB_WARNINGS,
+	WARNING_EXTRA,
+	WARNING_EVERYTHING,
+
+	NB_WARNINGS_ALL
+#define NB_META_WARNINGS (NB_WARNINGS_ALL - NB_WARNINGS)
+};
+
+void processWarningFlag(char const *flag);
+
+/*
+ * Used to warn the user about problems that don't prevent the generation of
+ * valid code.
+ */
+void warning(enum WarningID id, const char *fmt, ...);
+
+/*
+ * Used for errors that compromise the whole assembly process by affecting the
+ * following code, potencially making the assembler generate errors caused by
+ * the first one and unrelated to the code that the assembler complains about.
+ * It is also used when the assembler goes into an invalid state (for example,
+ * when it fails to allocate memory).
+ */
+noreturn_ void fatalerror(const char *fmt, ...);
+
+/*
+ * Used for errors that make it impossible to assemble correctly, but don't
+ * affect the following code. The code will fail to assemble but the user will
+ * get a list of all errors at the end, making it easier to fix all of them at
+ * once.
+ */
+void yyerror(const char *fmt, ...);
+
+#endif