From 17cd6a2ec9ede260a99dd997be0ec871c62370c1 Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.im>
Date: Fri, 5 Sep 2014 19:49:31 +0200
Subject: [PATCH] build: check for needed commands in autogen.sh

And display a more informative message.
---
 autogen.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/autogen.sh b/autogen.sh
index 75a67ff1..78e5d82b 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -22,6 +22,20 @@ AUTOCONF=${AUTOCONF:-autoconf}
 AUTOHEADER=${AUTOHEADER:-autoheader}
 AUTOMAKE=${AUTOMAKE:-automake}
 
+# Check we have all tools installed
+check_command() {
+    command -v "${1}" > /dev/null 2>&1 || {
+        >&2 echo "autogen.sh: could not find \`$1'. \`$1' is required to run autogen.sh."
+        exit 1
+    }
+}
+check_command "$LIBTOOLIZE"
+check_command "$AUTORECONF"
+check_command "$ACLOCAL"
+check_command "$AUTOCONF"
+check_command "$AUTOHEADER"
+check_command "$AUTOMAKE"
+
 echo "autogen.sh: start libtoolize to get ltmain.sh"
 ${LIBTOOLIZE} --copy --force
 echo "autogen.sh: reconfigure with autoreconf"
-- 
2.39.5