Release version 5.

[thirdparty/rng-tools.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 9b564723e1971e57816f871c66848c35c398a1c4..27a2dba53d65e9bcdd77937518fd4f963931dbab 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -17,12 +17,21 @@ dnl You should have received a copy of the GNU General Public License
 dnl along with this program; if not, write to the Free Software
 dnl Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA  02110-1335  USA
 
-AC_INIT(rng-tools, 4, [Jeff Garzik <jgarzik@pobox.com>])
+AC_INIT(rng-tools, 5, [Jeff Garzik <jgarzik@pobox.com>])
 AC_PREREQ(2.52)
 AC_CONFIG_SRCDIR([rngd.c])
 AM_INIT_AUTOMAKE([gnu])
 AC_CONFIG_HEADERS([rng-tools-config.h])
 
+dnl Parse options
+
+AC_ARG_WITH([libgcrypt],
+       AS_HELP_STRING([--without-libgcrypt],
+               [Disable libgcrypt support. Systems that support RDRAND but not AES-NI will require libgcrypt in order to use RDRAND as an entropy source. (Default: --with-libgcrypt)]),
+       [],
+       [with_libgcrypt=check]
+)
+
 dnl Make sure anyone changing configure.ac/Makefile.am has a clue
 AM_MAINTAINER_MODE
 
@@ -47,6 +56,32 @@ dnl -------------------------------------
 dnl Checks for optional library functions
 dnl -------------------------------------
 
+dnl -------------------------------------
+dnl Check for libgcrypt support
+dnl -------------------------------------
+
+AS_IF(
+       [test "x$with_libgcrypt" != "xno"],
+       [
+               AC_CHECK_HEADER([gcrypt.h],
+                       AC_CHECK_LIB(
+                               [gcrypt],
+                               [gcry_check_version], ,
+                               [
+                                       if test "x$with_libgcrypt" != "xcheck"; then
+                                               AC_MSG_FAILURE([libgcrypt not found]); else
+                                               AC_MSG_NOTICE([libgcrypt support disabled])
+                                       fi
+                               ]
+                       ),
+                       [if test "x$with_libgcrypt" != "xcheck"; then
+                               AC_MSG_FAILURE([libgcrypt headers not found]); else
+                               AC_MSG_NOTICE([libgcrypt support disabled])
+                       fi]
+               )
+       ]
+)
+
 dnl -----------------
 dnl Configure options
 dnl -----------------