[MacPorts] #69190: compiler.blacklist does not work correctly now and prohibits new Clangs on 10.6 Intel

[MacPorts]

#69190: compiler.blacklist does not work correctly now and prohibits new Clangs on
10.6 Intel
---------------------------------+--------------------
 Reporter:  barracuda156         |      Owner:  (none)
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  base                 |    Version:  2.9.0
 Keywords:  x86_64, snowleopard  |       Port:
---------------------------------+--------------------
 I cannot make the base to pick correct compilers now via blacklist for
 `folly`. What I need is `clang-15` and not `clang-11`.

 The port currently has:
 {{{
 compiler.cxx_standard   2017
 compiler.blacklist-append {clang < 1100}
 compiler.blacklist-append {macports-clang-[5-9].0}
 compiler.blacklist-append macports-gcc-12
 }}}

 On 10.6.8 I get in result:
 {{{
 10:MacPorts-2.9.0 svacchanda$ port deps folly
 Full Name: folly @2024.01.22.00_0
 Build Dependencies:   cmake, ninja, clang-11, pkgconfig
 Library Dependencies: bzip2, double-conversion, gflags, google-glog,
 libevent,
                       libsodium, libunwind, lz4, lzma, snappy, xz, zlib,
 zstd,
                       libfmt10, libcxx, boost181, openssl3, legacy-
 support,
                       macports-libcxx
 }}}

 I though C++17 will pick a newer clang, but anyway, `clang-11` cannot
 built it, so I try adding:
 {{{
 compiler.blacklist-append {macports-clang-[5-9].0} macports-clang-10
 macports-clang-11
 }}}

 And nothing, it still wants `clang-11`:
 {{{
 10:MacPorts-2.9.0 svacchanda$ port deps folly
 Warning: All compilers are either blacklisted or unavailable; defaulting
 to first fallback option
 Full Name: folly @2024.01.22.00_0
 Build Dependencies:   cmake, ninja, clang-11, pkgconfig
 Library Dependencies: bzip2, double-conversion, gflags, google-glog,
 libevent,
                       libsodium, libunwind, lz4, lzma, snappy, xz, zlib,
 zstd,
                       libfmt10, libcxx, boost181, openssl3, legacy-
 support,
                       macports-libcxx
 }}}

 Only `compiler.whitelist macports-clang-16` works:
 {{{
 10:MacPorts-2.9.0 svacchanda$ port deps folly
 Full Name: folly @2024.01.22.00_0
 Build Dependencies:   cmake, ninja, clang-16, pkgconfig
 Library Dependencies: bzip2, double-conversion, gflags, google-glog,
 libevent,
                       libsodium, libunwind, lz4, lzma, snappy, xz, zlib,
 zstd,
                       libfmt10, libcxx, boost181, openssl3, legacy-
 support,
                       macports-libcxx
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/69190>
MacPorts <https://www.macports.org/>
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