Jesper Eskilson wrote:
Bill Hoffman wrote:
OK, so you want to disable the rerun of CMake, not the cache. That
can be done with the CMAKE_SUPPRESS_REGENERATION variable. (set it to
TRUE).
Yes, I know how to use this variable.
You should never have to "clear out the cache".
If I make a change in CMakeLists.txt which should cause a (cached)
variable to change its value, don't I have to delete the cache for the
new value to be calculated?
Say that I use FIND_PROGRAM() to locate a program. If the program has
moved, how can CMake know that the value in the cache has to be
recalculated?
For this case, you could have something like this:
# if SOME_PROGRAM has a value but the program has been moved
# or removed from the system, then clear the cache entry
# so that find_program will try again.
if(SOME_PROGRAM AND NOT EXISTS ${SOME_PROGRAM})
set(SOME_PROGRAM NOTFOUND CACHE FORCE "some program")
endif(SOME_PROGRAM AND NOT EXISTS ${SOME_PROGRAM})
find_program(SOME_PROGRAM myprog)
So, if you know that you are changing a cmakelist file in a way that
requires something to be removed from the cache, just remove it, but be
careful not to remove it all the time.
-Bill
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