From 61a42ce222ed07da0c22a5394e5f3b59cc4bf690 Mon Sep 17 00:00:00 2001
From: "A. Karl Kornel" <akkornel@stanford.edu>
Date: Fri, 22 Jan 2016 22:19:45 -0800
Subject: Make Perl path configurable & check version

Use configure to determine the path to Perl, and error out if Perl is
not found or is too old.  This also means users can set a path to a
custom or weirdly-named Perl binary.
---
 configure.ac | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 4f56eb0..350132a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,6 +79,15 @@ AS_IF([test x"$REMCTLD" != x],
     [AC_DEFINE_UNQUOTED([PATH_REMCTLD], ["$REMCTLD"],
         [Define to the full path to remctld to run remctl tests.])])
 
+AC_ARG_VAR(PERL, [Path to the Perl binary])
+AC_PATH_PROG(PERL, perl)
+if test -z "$PERL"; then
+    AC_MSG_ERROR([Could not find Perl.])
+fi
+$PERL -e 'require 5.008;' || {
+    AC_MSG_ERROR([Perl 5.8 or better is required.])
+}
+
 dnl Enable appropriate warnings.
 AM_CONDITIONAL([WARNINGS_GCC], [test x"$GCC" = xyes && test x"$CLANG" != xyes])
 AM_CONDITIONAL([WARNINGS_CLANG], [test x"$CLANG" = xyes])
-- 
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