bring back autogen.sh - some build environments work better with it

autogen.sh

+#!/bin/sh
+
+set -e
+set -u
+
+if ! command -v libtoolize >/dev/null
+then
+	echo "libtoolize: command not found, falling back to glibtoolize" >&2
+	alias libtoolize=glibtoolize
+fi
+
+mkdir -p m4
+aclocal
+libtoolize --copy --force
+autoheader
+automake --add-missing --copy --foreign
+autoconf

bootstrap

@@ -7,19 +7,7 @@ WORK_DIR=$(pwd)
 ROOT_DIR=$(dirname "$0")
 
 cd "$ROOT_DIR"
-
-if ! command -v libtoolize >/dev/null
-then
-	echo "libtoolize: command not found, falling back to glibtoolize" >&2
-	alias libtoolize=glibtoolize
-fi
-
-mkdir -p m4
-aclocal
-libtoolize --copy --force
-autoheader
-automake --add-missing --copy --foreign
-autoconf
-
+. ./autogen.sh
 cd "$WORK_DIR"
+
 "$ROOT_DIR"/configure "$@"