Add missing file to pull request: m4/perlmod.m4

m4/perlmod.m4

@@ -0,0 +1,34 @@
+# perlmod.m4 - Check for the availability of a perl module -*-Autoconf-*-
+#
+# Copyright (C) 2015 by attila <attila@stalphonsos.com>
+#
+# Permission to use, copy, modify, and distribute this software for
+# any purpose with or without fee is hereby granted, provided that the
+# above copyright notice and this permission notice appear in all
+# copies.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+# AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+# DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+# PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+# TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
+# AM_PERL_MODULE([module_name],[code_to_execute])
+# -----------------------------------------------
+
+# serial 1
+
+AC_DEFUN([AM_PERL_MODULE],
+[AC_PREREQ([2.60])dnl
+ AC_MSG_CHECKING([for $1])
+ _modfile=`$PERL -e 'use '$1'; my $p="'$1'"; $p =~ s/::/\//g; print $INC{"$p.pm"}."\n";' 2>/dev/null`
+ if test -z "$_modfile"; then
+    AC_MSG_WARN([missing $1])
+ else
+    AC_MSG_RESULT([$_modfile])
+    m4_default([$2],[:])
+ fi
+])dnl