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cmakepreprocessoradditiondefinition

File path with cmake add_definitions

I am trying to replace a hard coded preprocessor 

#define MY_FILE_PATH "/usr/local/myfile"

with add_definitions in cmake

add_definitions(-DMY_FILE_PATH=${MY_FILE_PATH})

and while calling cmake I use -DMY_FILE_PATH=/usr/tmp/myfile but get all kind of errors e.g., expected primary expression before '/' token and tmp not find etc. Is it possible to use add_definitions in my scenario or should I try configure_file. Does add_definitions only supports integer values?

Solution

  • Your original code defined the macro to a string literal, but your CMake code is defining it to a sequence of tokens. In ohter words, you dropped the quotation marks.

    Add them back when invoking CMake:

    -DMY_FILE_PATH="/usr/tmp/myfile"

    (You might have to escape them properly for your shell).