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AC_DEFUN([DNSDIST_ENABLE_TLS_PROVIDERS], [
AC_MSG_CHECKING([whether to enable OpenSSL >= 3.0 TLS providers (experimental)])
AC_ARG_ENABLE([tls-providers],
AS_HELP_STRING([--enable-tls-providers], [enable TLS providers (experimental and requires OpenSSL >= 3.0) @<:@default=no@:>@]),
[enable_tls_providers=$enableval],
[enable_tls_providers=no]
)
AC_MSG_RESULT([$enable_tls_providers])
AM_CONDITIONAL([HAVE_TLS_PROVIDERS], [test "x$enable_tls_providers" != "xno"])
PKG_CHECK_MODULES([LIBSSL], [libssl >= 3.0], [
[HAVE_LIBSSL_3_PLUS=1]
AC_DEFINE([HAVE_LIBSSL_3_PLUS], [1], [Define to 1 if you have OpenSSL >= 3.0])
], [ : ])
AM_COND_IF([HAVE_TLS_PROVIDERS], [
AC_DEFINE([HAVE_TLS_PROVIDERS], [1], [Define to 1 if you enable OpenSSL >= 3.0 TLS providers])
AS_IF([test "x$HAVE_LIBSSL_3_PLUS" != "x1"], [
AC_MSG_ERROR([TLS providers support requires OpenSSL >= 3.0])
])
])
])
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