configure: correctly detect bignum Building with bignum is currently not possible, since we're checking ol_with_tls against a value it is never assigned in any case. Since bignum is from openssl, and openssl is the preferred TLS implementation, if the bignum headers are found, it means we do have TLS and it is opensl. So, keep the check for the bignum header, but check against ol_link_tls which means that openssl is enabled when we find the bignum headers. Signed-off-by: "Yann E. MORIN" diff -durN openldap-2.4.40.orig/configure openldap-2.4.40/configure --- openldap-2.4.40.orig/configure 2014-09-19 03:48:49.000000000 +0200 +++ openldap-2.4.40/configure 2015-01-25 18:44:54.216879362 +0100 @@ -23478,7 +23478,7 @@ if test "$ac_cv_header_openssl_bn_h" = "yes" && test "$ac_cv_header_openssl_crypto_h" = "yes" && - test "$ol_with_tls" = "found" ; then + test "$ol_link_tls" = "yes" ; then ol_with_mp=bignum $as_echo "#define USE_MP_BIGNUM 1" >>confdefs.h diff -durN openldap-2.4.40.orig/configure.in openldap-2.4.40/configure.in --- openldap-2.4.40.orig/configure.in 2014-09-19 03:48:49.000000000 +0200 +++ openldap-2.4.40/configure.in 2015-01-25 18:44:37.628676446 +0100 @@ -2367,7 +2367,7 @@ AC_CHECK_HEADERS(openssl/crypto.h) if test "$ac_cv_header_openssl_bn_h" = "yes" && test "$ac_cv_header_openssl_crypto_h" = "yes" && - test "$ol_with_tls" = "found" ; then + test "$ol_link_tls" = "yes" ; then ol_with_mp=bignum AC_DEFINE(USE_MP_BIGNUM,1,[define to use OpenSSL BIGNUM for MP]) elif test $ol_with_mp = bignum ; then