Earlier Apple Xcode compilers, e.g. one targeting Mac OS X 10.7, don't
support dependency generation and one still has to use makedepend. It's
unclear when it was fixed, but all clang-based Apple compilers seem to
support -M options.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6167)
if (!$disabled{makedepend}) {
# We know that GNU C version 3 and up as well as all clang
- # versions support dependency generation
- if ($predefined{__GNUC__} >= 3) {
+ # versions support dependency generation, but Xcode did not
+ # handle $cc -M before clang support (but claims __GNUC__ = 3)
+ if (($predefined{__GNUC__} // -1) >= 3
+ && !($predefined{__APPLE_CC__} && !$predefined{__clang__})) {
$config{makedepprog} = $cc;
} else {
$config{makedepprog} = which('makedepend');