From cf267b6ac1f0e10f90716a490cc4d1e60aea5de8 Mon Sep 17 00:00:00 2001
From: ng0 <ng0@n0.is>
Date: Wed, 27 Nov 2019 21:55:31 +0000
Subject: [PATCH] bootstrap: check for the shell builtin we use and exit if it
 doesn't exist.

---
 bootstrap | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/bootstrap b/bootstrap
index e2654d9bd..06a82ddfc 100755
--- a/bootstrap
+++ b/bootstrap
@@ -18,6 +18,17 @@ cleanup()
     rm -rf libltdl
 }
 
+errmsg=''
+
+# Check if shell supports builtin 'type'.
+if test -z "$errmsg"; then
+    if ! (eval 'type type') >/dev/null 2>&1
+    then
+        errmsg='Shell does not support type builtin'
+        exit 1
+    fi
+fi
+
 # This is more portable than `which' but comes with
 # the caveat of not(?) properly working on busybox's ash:
 existence()
-- 
2.25.1