add an option (--warn=error) to treat warnings as errors

tools/qfcc/include/qfcc.h

@@ -541,6 +541,7 @@ int	ReuseString (const char *str);
 typedef struct {
 	int		cow;		// copy on write for constants
 	int		version;	// maximum progs version to support (eg, 6 for id)
+	int		warn_error;	// treat warnings as errors
 } options_t;
 
 extern options_t options;

tools/qfcc/source/expr.c

@@ -100,6 +100,11 @@ warning (expr_t *e, const char *fmt, ...)
 	va_list     args;
 	string_t file = s_file;
 	int line = pr_source_line;
+
+	if (options.warn_error) {
+		options.warn_error = 0;		// only want to do this once
+		error (e, "warnings treated as errors");
+	}
 	
 	va_start (args, fmt);
 	if (e) {

tools/qfcc/source/qfcc.c

@@ -853,6 +853,7 @@ Options: \n\
 	-V, --version		output version information and exit\n\
 	--cow			allow assignment to initialized globals\n\
 	--id			only support id (progs version 6) features\n\
+	--warn=error	treat warnings as errors\n\
 ");
 		return 1;
 	}
@@ -880,6 +881,11 @@ Options: \n\
 		options.version = PROG_ID_VERSION;
 	}
 
+	// FIXME eww, really must go to getopt
+	if (CheckParm ("--warn=error")) {
+		options.warn_error = 1;
+	}
+
 	if (strcmp (sourcedir, ".")) {
 		printf ("Source directory: %s\n", sourcedir);
 	}