# HG changeset patch
# User Martti Rannanjärvi <martti.rannanjarvi@dovecot.fi>
# Date 1512033350 -7200
# Node ID c7aa2518697363f2be695f12a3ea2749f6b378e3
# Parent  aa3c9a064b17386abe10bcd303ebc4ca20a2a186
configure.ac: Add SSL_CTX_set_min_proto_version detection

diff -r aa3c9a064b17 -r c7aa25186973 configure.ac
--- a/configure.ac	Mon Feb 19 14:51:41 2018 +0200
+++ b/configure.ac	Thu Nov 30 11:15:50 2017 +0200
@@ -1771,6 +1771,25 @@
       AC_DEFINE(HAVE_SSL_NEW_MEM_FUNCS,, [Define if CRYPTO_set_mem_functions has new style parameters])
     fi
 
+    # SSL_CTX_set_min_proto_version is also a macro so AC_CHECK_LIB fails here.
+    AC_CACHE_CHECK([whether SSL_CTX_set_min_proto_version exists],i_cv_have_ssl_ctx_set_min_proto_version,[
+      old_LIBS=$LIBS
+      LIBS="$LIBS -lssl"
+      AC_TRY_LINK([
+        #include <openssl/ssl.h>
+      ], [
+        SSL_CTX_set_min_proto_version((void*)0, 0);
+      ], [
+        i_cv_have_ssl_ctx_set_min_proto_version=yes
+      ], [
+        i_cv_have_ssl_ctx_set_min_proto_version=no
+      ])
+      LIBS=$old_LIBS
+    ])
+    if test $i_cv_have_ssl_ctx_set_min_proto_version = yes; then
+      AC_DEFINE(HAVE_SSL_CTX_SET_MIN_PROTO_VERSION,, [Define if you have SSL_CTX_set_min_proto_version])
+    fi
+
     AC_CHECK_LIB(ssl, ERR_remove_thread_state, [
       AC_DEFINE(HAVE_OPENSSL_ERR_REMOVE_THREAD_STATE,, [Define if you have ERR_remove_thread_state])
     ],, $SSL_LIBS)