From d10d6546d40698b7672f19deea6faeb0d62935e0 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Oct 18 2019 01:37:32 +0000
Subject: build system: configure: support shells with function-specific $0.


---

diff --git a/configure b/configure
index 8ec6f09..c7fe370 100755
--- a/configure
+++ b/configure
@@ -4,6 +4,10 @@ set -eu
 
 trap config_failure 1 2 EXIT
 
+# before we begin...
+mb_script="$0"
+mb_path="$PATH"
+
 usage()
 {
 	cat "$mb_project_dir"/config.usage
@@ -44,7 +48,7 @@ warning_msg()
 
 init_vars()
 {
-	mb_project_dir=$(cd "$(dirname $0)" ; pwd)
+	mb_project_dir=$(cd "$(dirname "$mb_script")" ; pwd)
 	mb_pwd=$(pwd)
 
 	mb_custom_cfgdefs_args=''