build carthw.cfg in

things like libretro don't want external files,
but we still look for one and prefer it if it's available

tools/make_carthw_c.c

@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+int main(int argc, char *argv[])
+{
+	FILE *fi, *fo;
+	char buf[256];
+
+	if (argc != 3) {
+		printf("usage:\n%s <carthw.cfg> <carthw.c>\n", argv[0]);
+		return 1;
+	}
+
+	fi = fopen(argv[1], "r");
+	fo = fopen(argv[2], "w");
+	if (fi == NULL || fo == NULL) {
+		printf("fopen failed\n");
+		return 1;
+	}
+
+	fprintf(fo, "/* generated by %s, do not modify */\n", argv[0]);
+	fprintf(fo, "static const char builtin_carthw_cfg[] =\n");
+
+	while ((fgets(buf, sizeof(buf), fi)))
+	{
+		char bufd[256];
+		char *d = bufd, *p = buf;
+		int quote = 0;
+
+		while (*p && isspace(*p))
+			p++;
+
+		if (*p == 0 || *p == '#')
+			continue;
+
+		/* section names not needed */
+		if (*p == '[')
+			strcpy(p, "[]");
+
+		for (; *p != 0; p++) {
+			if (!quote && isspace(*p))
+				continue;
+			if (*p == '"') {
+				quote = !quote;
+				*d++ = '\\';
+			}
+			*d++ = *p;
+		}
+		*d = 0;
+
+
+		fprintf(fo, "  \"%s\\n\"\n", bufd);
+	}
+
+	fprintf(fo, ";\n");
+
+	fclose(fi);
+	fclose(fo);
+
+	return 0;
+}