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Asked: 2026-05-10T16:05:42+00:00

I code C++ using MS Dev Studio and I work from home two days

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I code C++ using MS Dev Studio and I work from home two days per week. I use CVS to keep my sources synchronized between the two computers but there are difference between the environments the machines are in.

Can anyone suggest a way I can conditionally modify constants in my code depending on whether I am compiling on my home box or not ?

What I am after is a way of defining a symbol, let’s call it _ATHOME, automatically so I can do this:

#ifdef _ATHOME #  define TEST_FILES  'E:\\Test' #  define TEST_SERVER '192.168.0.1' #else #  define TEST_FILE   'Z:\\Project\\Blah\\Test' #  define TEST_SERVER '212.45.68.43' #endif

NB: This is for development and debugging purposes of course, I would never release software with hard coded constants like this.

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1 Answer

  1. On your home and work machines, set an environment variable LOCATION that is either ‘1’ for home or ‘2’ for work.

    Then in the preprocessor options, add a preprocessor define /DLOCATION=$(LOCATION). This will evaluate to either the ‘home’ or ‘work’ string that you set in the environment variable.

    Then in your code:

    #if LOCATION==1   // home #else   // work #endif
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