Add a config variable "use_int128" to indicate if 128-bit integers are
supported or not at the configure time. This makes it easier to
automatically select 64-bit versus 32-bit implementation for curve448.
Signed-off-by: Amitay Isaacs <amitay@ozlabs.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14784)
}
}
+# Check if __SIZEOF_INT128__ is defined by compiler
+$config{use_int128} = 0;
+{
+ my $cc = $config{CROSS_COMPILE}.$config{CC};
+ open(PIPE, "$cc -E -dM - </dev/null 2>&1 |");
+ while(<PIPE>) {
+ if (m/__SIZEOF_INT128__/) {
+ $config{use_int128} = 1;
+ last;
+ }
+ }
+ close(PIPE);
+}
+
# Deal with bn_ops ###################################################
$config{bn_ll} =0;