# HG changeset patch
# User Matt Johnston <matt@ucc.asn.au>
# Date 1519221592 -28800
# Node ID 63fa53d3b6c7ea5948dc2c1d9ac57a8484ffaea5
# Parent  66a1a2547133288bb684e72285996b3322b72fc5
print hg revid

diff -r 66a1a2547133 -r 63fa53d3b6c7 configure.ac
--- a/configure.ac	Wed Feb 21 21:49:24 2018 +0800
+++ b/configure.ac	Wed Feb 21 21:59:52 2018 +0800
@@ -9,6 +9,12 @@
 AC_INIT
 AC_CONFIG_SRCDIR(buffer.c)
 
+# Record which revision is being built
+if which -s hg && test -d "$srcdir/.hg"; then
+	hgrev=`hg id -i -R "$srcdir"`
+	echo "Source directory Mercurial base revision $hgrev"
+fi
+
 # Checks for programs.
 AC_PROG_CC