configure.ac: use CPPFLAGS for SSL_OP_NO_TICKET check

AC_EGREP_CPP uses CPPFLAGS, not CFLAGS. Make sure the macro can find
OpenSSL by temporarily adding OPENSSL_CRYPTO_FLAGS to CPPFLAGS.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Heiko Hund <heiko.hund@sophos.com>
Message-Id: <5339EFFC.6090908@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8419
Signed-off-by: Gert Doering <gert@greenie.muc.de>

diff --git a/configure.ac b/configure.ac
index 7e94280dfccc84356f058aeb558f278487375967..0c2abb9d487b55ac28a8f82ec3239929f5f9cf48 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -794,6 +794,8 @@ if test "${have_openssl_crypto}" = "yes"; then
 fi
 
 if test "${have_openssl_ssl}" = "yes"; then
+    saved_CPPFLAGS="${CPPFLAGS}"
+    CPPFLAGS="${CPPFLAGS} ${OPENSSL_CRYPTO_CFLAGS}"
     AC_MSG_CHECKING([for SSL_OP_NO_TICKET flag in OpenSSL])
     AC_EGREP_CPP(have_ssl_op_no_ticket, [
     #include <openssl/ssl.h>
@@ -806,6 +808,7 @@ if test "${have_openssl_ssl}" = "yes"; then
         AC_MSG_RESULT([no])
         AC_ERROR([OpenVPN 2.4+ requires SSL_OP_NO_TICKET in OpenSSL])
     ])
+    CPPFLAGS="${saved_CPPFLAGS}"
 fi
 
 AC_ARG_VAR([POLARSSL_CFLAGS], [C compiler flags for polarssl])