[MacPorts] #65011: cargo: 0.61.1 fails to build for 10.12 and earlier

[MacPorts]

#65011: cargo: 0.61.1 fails to build for 10.12 and earlier
---------------------+-------------------------
 Reporter:  mascguy  |      Owner:  herbygillot
     Type:  defect   |     Status:  assigned
 Priority:  High     |  Milestone:
Component:  ports    |    Version:  2.7.2
 Keywords:           |       Port:  cargo
---------------------+-------------------------
 This port is broken for a wide swath of users, despite being a fairly
 critical toolchain component. Please review the build status within 12
 hours after updating, to be sure it builds successfully everywhere!

 https://ports.macports.org/port/cargo/builds/

 At least on 10.12, the issue appears to potentially be related to OpenSSL
 and/or OpenSSH:

 {{{
 /_opt_bblocal_var_buildworker_ports_build_ports_devel_cargo/cargo/work/cargo-0.61.1/target/x86_64
 -apple-darwin/release/deps/cargo-5b31aa106374ee84" "-Wl,-dead_strip"
 "-nodefaultlibs"
   = note: Undefined symbols for architecture x86_64:
             "_EVP_PKEY_id", referenced from:
                 __libssh2_ed25519_new_private_frommemory in
 liblibssh2_sys-e53ed92cbfc19e85.rlib(openssl.o)
                 __libssh2_pub_priv_keyfile in liblibssh2_sys-
 e53ed92cbfc19e85.rlib(openssl.o)
                 __libssh2_pub_priv_keyfilememory in liblibssh2_sys-
 e53ed92cbfc19e85.rlib(openssl.o)
           ld: symbol(s) not found for architecture x86_64
           clang: error: linker command failed with exit code 1 (use -v to
 see invocation)
 }}}

 Members: Please do NOT downgrade the severity of this, as it's a high-
 priority issue that needs to be addressed ASAP. Thanks!

-- 
Ticket URL: <https://trac.macports.org/ticket/65011>
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