CODEWITHSUNDEEP
variablescmakegenerator-expression
glades
glades

Reputation: 4888

Is it possible to put generator expressions into cache variables?

Say a library (that I don't own) calls

include_directories(${SOME_CACHED_DIR})

with SOME_CACHED_DIR as a cache var, can I then somehow predeclare SOME_CACHED_DIR in the parent project like this:

    set(SOME_CACHED_DIR CACHE STRING
        $<BUILD_INTERFACE:${otherlib_BINARY_DIR}>
        $<INSTALL_INTERFACE:${otherlib_INSTALL_DIR}>
    )

So that I could differentiate out the directories for the build and install tree picked up by include_directories? I tried to print out the resulting var using

    file(GENERATE OUTPUT ${CMAKE_CURRENT_LIST_DIR}/genexpr.txt CONTENT ${SOME_CACHED_DIR})

But it always prints SOME_CACHED_DIR-NOTFOUND.

EDIT: Corrected spelling mistake

Upvotes: 0

Views: 220

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