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Asked: 2026-05-27T21:01:34+00:00

How to specify string option in CMakeLists.txt ? Syntax option(OPT1 Helpstring ON) works perfectly

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How to specify string option in CMakeLists.txt? Syntax option(OPT1 "Helpstring" ON) works perfectly for boolean options but I would like to have few string options like -march= argument passed to gcc.

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  1. Editorial Team

    Any user-settable variable can be defined with set:

    set(OPT2 "Default" CACHE STRING "Helpstring")

    so -march would be something like:

    set(ARCH "" CACHE STRING "Architecture to tell gcc to optimize for (-march)")
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