cmake-bootstrap @3.9.6: Cannot find appropriate C compiler on this system.

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-13_arm64-builder/builds/11767/steps/install-dependencies/logs/stdio

Executing:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_cmake-bootstrap/cmake-bootstrap/work/cmake-3.9.6-x86_64" && ./configure --prefix=/opt/local/libexec/cmake-bootstrap --docdir=share/doc/cmake --parallel=8 --no-system-libs --no-server 
DEBUG: system:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_cmake-bootstrap/cmake-bootstrap/work/cmake-3.9.6-x86_64" && ./configure --prefix=/opt/local/libexec/cmake-bootstrap --docdir=share/doc/cmake --parallel=8 --no-system-libs --no-server 
---------------------------------------------
CMake 3.9.6, Copyright 2000-2017 Kitware, Inc. and Contributors
---------------------------------------------
Error when bootstrapping CMake:
Cannot find appropriate C compiler on this system.
Please specify one using environment variable CC.
See cmake_bootstrap.log for compilers attempted.

---------------------------------------------
Log of errors: /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_cmake-bootstrap/cmake-bootstrap/work/cmake-3.9.6-x86_64/Bootstrap.cmk/cmake_bootstrap.log
---------------------------------------------
Command failed:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_cmake-bootstrap/cmake-bootstrap/work/cmake-3.9.6-x86_64" && ./configure --prefix=/opt/local/libexec/cmake-bootstrap --docdir=share/doc/cmake --parallel=8 --no-system-libs --no-server 
Exit code: 6

[kencu (Ken)]

This appears to be a universal build of cmake-bootstrap.

So far I can't reproduce this... so we'll see how things play out for a while.

[kencu (Ken)]

On my arm Mac, builds through without any intervention.

% port -v installed cmake-bootstrap
The following ports are currently installed:
  cmake-bootstrap @3.9.6_0+universal (active) requested_variants='+universal' platform='darwin 22' archs='arm64 x86_64' date='2023-03-09T13:20:17-0800'

[kencu (Ken)]

In a4fda7b98703ff055b9dacb7e1dca58d5376d490/macports-ports (master):

cmake-bootstrap: disable universal variant

this port does not need to be universal, being a
build tool without libraries, and trying to build
it universal can cause errors

closes #66213
closes #67072