From 51dac511ecd4673cecdb8982a5c1b24def9555c9 Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <marcel@holtmann.org>
Date: Wed, 8 Jun 2011 10:29:01 +0200
Subject: build: Check for linux/if_alg.h if tools are enabled

---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 06ac2102..fa91a9c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -392,6 +392,9 @@ if (test "${enable_tools}" = "yes"); then
 				AC_MSG_ERROR(GnuTLS library is required))
 	AC_SUBST(GNUTLS_CFLAGS)
 	AC_SUBST(GNUTLS_LIBS)
+
+	AC_CHECK_HEADERS(linux/if_alg.h, dummy=yes,
+		AC_MSG_ERROR(User-space algorithm header files are required))
 fi
 AM_CONDITIONAL(TOOLS, test "${enable_tools}" = "yes")
 
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