Build everything as C++ (#1176)

include/asm/warning.hpp

@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef WARNING_H
+#define WARNING_H
+
+#include "helpers.hpp"
+
+extern unsigned int nbErrors;
+
+enum WarningState {
+	WARNING_DEFAULT,
+	WARNING_DISABLED,
+	WARNING_ENABLED,
+	WARNING_ERROR
+};
+
+enum WarningID {
+	WARNING_ASSERT,		      // Assertions
+	WARNING_BACKWARDS_FOR,	      // `for` loop with backwards range
+	WARNING_BUILTIN_ARG,	      // Invalid args to builtins
+	WARNING_CHARMAP_REDEF,	      // Charmap entry re-definition
+	WARNING_DIV,		      // Division undefined behavior
+	WARNING_EMPTY_DATA_DIRECTIVE, // `db`, `dw` or `dl` directive without data in ROM
+	WARNING_EMPTY_MACRO_ARG,      // Empty macro argument
+	WARNING_EMPTY_STRRPL,	      // Empty second argument in `STRRPL`
+	WARNING_LARGE_CONSTANT,	      // Constants too large
+	WARNING_LONG_STR,	      // String too long for internal buffers
+	WARNING_MACRO_SHIFT,	      // Shift past available arguments in macro
+	WARNING_NESTED_COMMENT,	      // Comment-start delimiter in a block comment
+	WARNING_OBSOLETE,	      // Obsolete things
+	WARNING_SHIFT,		      // Shifting undefined behavior
+	WARNING_SHIFT_AMOUNT,	      // Strange shift amount
+	WARNING_USER,		      // User warnings
+
+	NB_PLAIN_WARNINGS,
+
+	// Warnings past this point are "parametric" warnings, only mapping to a single flag
+#define PARAM_WARNINGS_START NB_PLAIN_WARNINGS
+	// Treating string as number may lose some bits
+	WARNING_NUMERIC_STRING_1 = PARAM_WARNINGS_START,
+	WARNING_NUMERIC_STRING_2,
+	// Implicit truncation loses some bits
+	WARNING_TRUNCATION_1,
+	WARNING_TRUNCATION_2,
+	// Character without charmap entry
+	WARNING_UNMAPPED_CHAR_1,
+	WARNING_UNMAPPED_CHAR_2,
+
+	NB_PLAIN_AND_PARAM_WARNINGS,
+#define NB_PARAM_WARNINGS (NB_PLAIN_AND_PARAM_WARNINGS - PARAM_WARNINGS_START)
+
+	// Warnings past this point are "meta" warnings
+#define META_WARNINGS_START NB_PLAIN_AND_PARAM_WARNINGS
+	WARNING_ALL = META_WARNINGS_START,
+	WARNING_EXTRA,
+	WARNING_EVERYTHING,
+
+	NB_WARNINGS,
+#define NB_META_WARNINGS (NB_WARNINGS - META_WARNINGS_START)
+};
+
+extern enum WarningState warningStates[NB_PLAIN_AND_PARAM_WARNINGS];
+extern bool warningsAreErrors;
+
+void processWarningFlag(char *flag);
+
+/*
+ * Used to warn the user about problems that don't prevent the generation of
+ * valid code.
+ */
+void warning(enum WarningID id, char const *fmt, ...) format_(printf, 2, 3);
+
+/*
+ * 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(char const *fmt, ...) format_(printf, 1, 2);
+
+/*
+ * 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 error(char const *fmt, ...) format_(printf, 1, 2);
+
+#endif // WARNING_H