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-rw-r--r--ext/openssl/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index e6673fb..2dec2fb 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -98,6 +98,7 @@ have_func("SSL_CTX_set_alpn_select_cb")
have_func("SSL_get_server_tmp_key", ["openssl/ssl.h"])
# added in 1.1.0
+have_struct_member("SSL", "ctx", "openssl/ssl.h") || $defs.push("-DHAVE_OPAQUE_OPENSSL")
have_func("BN_GENCB_new")
have_func("BN_GENCB_free")
have_func("BN_GENCB_get_arg")