Ben Boeckel 8195aa3026 Makefiles: quote $(COLOR) expansions ...

This handles the case where `COLOR` is set to some ANSI-like color
sequence in the ambient environment. These sequences tend to include `;`
which terminates the command and tries to use the next component
(typically an integer, possibly with a trailing `m`) with errors like:

    /bin/sh: line 1: 2: command not found
    /bin/sh: line 1: 255: command not found
    /bin/sh: line 1: 221: command not found
    /bin/sh: line 1: 255m: command not found

Also add a test that sets `COLOR` in the environment which affects the
generated Makefiles behavior.

See: https://discourse.cmake.org/t/cmake-failing-gcc-compiler-checks/8277

2023-06-08 11:05:11 -04:00

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