diff --git a/ap/lib/libssl/openssl-1.1.1o/Configurations/unix-checker.pm b/ap/lib/libssl/openssl-1.1.1o/Configurations/unix-checker.pm
new file mode 100644
index 0000000..b39b0eb
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/Configurations/unix-checker.pm
@@ -0,0 +1,22 @@
+#! /usr/bin/perl
+
+use Config;
+
+# Check that the perl implementation file modules generate paths that
+# we expect for the platform
+use File::Spec::Functions qw(:DEFAULT rel2abs);
+
+if (rel2abs('.') !~ m|/|) {
+    die <<EOF;
+
+******************************************************************************
+This perl implementation doesn't produce Unix like paths (with forward slash
+directory separators).  Please use an implementation that matches your
+building platform.
+
+This Perl version: $Config{version} for $Config{archname}
+******************************************************************************
+EOF
+}
+
+1;