Fix compatibility with LibreSSL and OpenSSL < 1.1.

[tinc] / m4 / openssl.m4

diff --git a/m4/openssl.m4 b/m4/openssl.m4
index ca9bbb5..0ff939b 100644 (file)
--- a/m4/openssl.m4
+++ b/m4/openssl.m4
@@ -55,4 +55,5 @@ AC_DEFUN([tinc_OPENSSL],
   )
 
   AC_CHECK_FUNCS([BN_GENCB_new ERR_remove_state RSA_set0_key], , , [#include <openssl/rsa.h>])
+  AC_CHECK_FUNCS([HMAC_CTX_new], , , [#include <openssl/hmac.h>])
 ])