Refactor how Makefile invokes Bison for reusability (#1259)

Co-authored-by: Eldred Habert <eldredhabert0@gmail.com>

src/bison.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -e
+
+BISONFLAGS=-Wall
+
+readonly BISON_VER=$(bison -V)
+add_flag () {
+	if awk <<<"$BISON_VER" -v major="$1" -v minor="$2" '
+	/^bison.*[0-9]+(\.[0-9]+)(\.[0-9]+)?$/ {
+		match($0, /[0-9]+(\.[0-9]+)(\.[0-9]+)?$/);
+		split(substr($0, RSTART), ver, ".");
+		if (ver[1] == major && ver[2] >= minor) { exit 0 } else { exit 1 }
+	}'; then
+		BISONFLAGS="-D$3 $BISONFLAGS"
+	fi
+}
+
+add_flag 3 5 api.token.raw=true
+add_flag 3 6 parse.error=detailed
+add_flag 3 0 parse.error=verbose
+add_flag 3 0 parse.lac=full
+add_flag 3 0 lr.type=ielr
+
+echo "BISONFLAGS=$BISONFLAGS"
+
+exec bison $BISONFLAGS -d -o "$1" "$2"