[MacPorts] #64088: cargo-c fails to build on 10.13

[MacPorts]

#64088: cargo-c fails to build on 10.13
-----------------------+---------------------------------
  Reporter:  bK4gYuRo  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  cargo-c
      Port:  cargo-c   |
-----------------------+---------------------------------

Comment (by mascguy):

 Thus far, I didn't consider that `cargo-c` may not be using the Xcode
 toolchain at all. And sure enough, it doesn't appear to, at least on
 10.13:

 {{{
 $ sw_vers
 ProductName:    Mac OS X
 ProductVersion: 10.13.6
 BuildVersion:   17G14019

 $ port info cargo-c
 cargo-c @0.9.5 (devel)

 Description:          cargo applet to build and install C-ABI compatibile
 dynamic and static libraries
 Homepage:             https://github.com/lu-zero/cargo-c

 Build Dependencies:   clang-13, cargo, pkgconfig
 Library Dependencies: libgit2, libiconv, zlib, openssl3
 Platforms:            darwin
 License:              MIT
 Maintainers:          Email: mcalhoun at macports.org, GitHub: MarcusCalhoun-
 Lopez
                       Policy: openmaintainer
 }}}

 And based on the build dependencies, it appears to use MacPorts' Clang.

 I'll let Marcus confirm whether any Xcode-related components still come
 into play during the build, such that the Xcode version might have an
 impact. But if not, then we might need to look at an upstream dependency
 instead.

 Marcus/Anyone, thoughts/ideas related to troubleshooting this ticket?

-- 
Ticket URL: <https://trac.macports.org/ticket/64088#comment:17>
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