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gcc compile function in ifdef


By : Zoran Zhai
Date : September 15 2020, 12:00 AM
it should still fix some issue The function test2 can still be called from a function in an external module, even if you don't call it here, so the definition of the function must exist.
If you change the function to static so that it can only be referenced from the current file and increase the optimization to -O1 or higher, the entire function is optimized out.
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A compile-time symbol was #defined but #ifdef does not see it


By : algorista
Date : March 29 2020, 07:55 AM
help you fix your problem It would be better for you to use _WIN32 instead of _WINDOWS_ for your conditional compilation test. _WINDOWS_ is defined only if windows.h has been included, while the compiler automatically defines _WIN32 for any build for a Windows target, regardless of what headers are included. In your situation, _WINDOWS_ is defined when you compile main.cpp but not when you compile test.cpp becuase test.cpp doesn't include windows.h.
Also, the _WINDOWS_ macro definition is an implementation detail of the windows.h header, and is not guaranteed to be used. For example, the MinGW version of windows.h does not define _WINDOWS_.

#ifdef for Java to remove finalize function at compile time


By : Danil Belkin
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I'd like to find a compile time solution to remove the finalize method of my classes according to a flag. This is to avoid performances issues with GC. , According to the javadoc

#ifdef MINGW32 then ...don't compile this


By : IAM Group Limited
Date : March 29 2020, 07:55 AM
this will help You want the opposite of #ifdef ... #ifndef, (or #if ! defined); and this is such trivial, fundamental C coding, that it hardly deserves a place here.

C# #if / #ifdef syntax doesn't compile, why?


By : Nikesh Patel
Date : March 29 2020, 07:55 AM
I hope this helps you . What error are you getting?
In any case, ( m_iApplicationType == ApplicationType.ASP_NET ) is not a compile time constant.
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