Take advantage of autotools in BSD environments

Taken from https://github.com/bgp/bgpq4/blob/main/bootstrap

diff --git a/autogen.sh b/autogen.sh
index d9debd26cc7474e9477b9825ffdf1dcf48dce48e..15e0846f0433c2a5f79bdf86d4fa8db1e073b67c 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,7 +1,42 @@
 #!/bin/sh
+#
+# Script to help bootstrap the build system when checked out from git
+#
 
-# Hello.
-# Run this file to generate the configure script.
-# You'll need Autoconf and Automake installed!
+bsd_environment() {
+       # Based on https://github.com/rvm/rvm/blob/59fe3b39f0fb5ae01ed5b9aa187201080815ac16/scripts/functions/build_config_system#L123
+       if [ -z "${AUTOCONF_VERSION}" ]
+       then
+               export AUTOCONF_VERSION
+               AUTOCONF_VERSION="$(
+                   ls -1 /usr/local/bin/autoreconf-* |
+                   awk -F- '{print $NF}' |
+                   sort |
+                   tail -n 1
+               )"
+               echo "Using autoconf version: $AUTOCONF_VERSION"
+       fi
 
-autoreconf --install --force
+       if [ -z "${AUTOMAKE_VERSION}" ]
+       then
+               export AUTOMAKE_VERSION
+               # FreeBSD might have automake-wrapper
+               AUTOMAKE_VERSION="$(
+                   ls -1 /usr/local/bin/automake-1* |
+                   awk -F- '{print $NF}' |
+                   sort |
+                   tail -n 1
+               )"
+               echo "Using automake version: $AUTOMAKE_VERSION"
+       fi
+}
+
+# Use the uname string to figure out if this is a BSD
+case "$(uname)" in
+       *BSD*) bsd_environment ;;
+esac
+
+test -n "$srcdir" || srcdir="$(dirname "$0")"
+test -n "$srcdir" || srcdir=.
+
+autoreconf --force --install --verbose "$srcdir"