diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 14760f3a..ba21272d 100644 --- a/configure.ac +++ b/configure.ac @@ -813,6 +813,9 @@ fi AC_MSG_NOTICE([LIBS:] "$LIBS") case "$LIBS" in *-lssl*|*libssl*) + AC_CHECK_DECLS([LIBRESSL_VERSION_NUMBER], + AC_MSG_ERROR([fetchmail cannot legally be linked against LibreSSL for lack of GPL2 clause 2b exception. See COPYING.]),, + [#include <openssl/ssl.h>]) AC_CHECK_DECLS([TLS1_3_VERSION],, AC_MSG_WARN([Your OpenSSL version is too old and does not support TLS v1.3. Upgrade.]), [#include <openssl/ssl.h>]) |