improve build script for Windows

Author: zamronypj

build.cmd

@@ -18,6 +18,11 @@ IF NOT EXIST build.prod.cfg (copy build.prod.cfg.sample build.prod.cfg)
 IF NOT DEFINED BUILD_TYPE (SET BUILD_TYPE=prod)
 IF NOT DEFINED UNIT_OUTPUT_DIR (SET UNIT_OUTPUT_DIR=bin\unit)
 IF NOT DEFINED EXEC_OUTPUT_DIR (SET EXEC_OUTPUT_DIR=bin\out)
-IF NOT DEFINED FPC_BIN (SET FPC_BIN=fpc)
+IF NOT DEFINED FPC_BIN (SET FPC_BIN=C:\fpc\fpc.exe)
+IF NOT DEFINED FPC_CFG (SET FPC_CFG=C:\fpc\fpc.cfg)
 
-%FPC_BIN% @unit.search.cfg @build.cfg src/fanocli.pas
+echo "Building Fano CLI with:"
+echo "FPC Bin=%FPC_BIN%"
+echo "FPC Cfg=%FPC_CFG%"
+
+%FPC_BIN% @%FPC_CFG% @unit.search.cfg @build.cfg src/fanocli.pas