Yann E. MORIN b8a28fad54 buildsys: handle ac_cv_cunit as a true cache-val ...

The ac_cv_-prefix variables are supposed to be settable from the command
line, à-la: ./configure ac_cv_foo=no

The canonical way of doing so is to use AC_CACHE_VAL() or AC_CACHE_CHECK().
The latter is to be preferred in our case, as it handles printing the
message for us.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

2018-12-04 09:27:30 +01:00

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