Fair enough, but I think that makes the command substantially less useful.
It means that I need to use set(BLAH "") if I want to empty a variable of
its contents, and I can never actually make it become undefined, counter to
the claim in the documentation:
set(BLAH blah CACHE INTERNAL "")
unset(BL
Looking at the current docs (
https://cmake.org/cmake/help/v3.12/command/unset.html ) I think the
first paragraph needs to be read as a single statement to understand
the behavior.
"Removes the specified variable causing it to become undefined. If
CACHE is present then the variable is removed from
I just recently came across this:
set(BLAH blah CACHE INTERNAL "")
unset(BLAH)
message("BLAH: ${BLAH}")
Surprisingly (to me), this prints out "blah". I had expected the unset
command to make the cached value inaccessible. The documentation just
states that the function "[r]emoves the specified
