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How to define C++ preprocessor variable in Makefile

Tags:

c++

makefile

I have a C++ preprocessor written like this:

  #ifdef cpp_variable    //x+y;   #endif

Can anyone tell me how to define this in Makefile.

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Joel Avatar asked Mar 06 '11 22:03

Joel

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1 Answers

This is compiler specific.

GCC uses -Dcpp_variable=VALUE or just -Dcpp_variable

Microsoft's compilers use /D

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Reed Copsey Avatar answered Sep 18 '22 14:09

Reed Copsey
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