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Re: preprocessor idea

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From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: preprocessor idea
Date	Thu, 13 Oct 2011 18:35:10 +0200
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On 12.10.2011 01:17, Arne Vajhøj wrote:
> On 10/11/2011 2:19 PM, Philipp Kraus wrote:
>> I use within my Java code different external libraries (DLL), so I have
>> create a string array with their names
>> so the libraries can be load with System.load / System.loadLibrary.
>>
>> I build the libraries (C++ code) with a toolchain and I use a lot of
>> preprocessor commands within
>> the C++ code, so I can enable or disable some function and so the using
>> of the libraries eg:
>>
>> c++:
>> #ifdef lib1
>> #endif
>>
>> #ifdef lib2
>> #endif
>>
>> So my Java code must load lib1 and lib2 if both defs are set. Java does
>> not support any preprocessor
>> flags, but in this case I need a tip for creating a flexiable Java code
>> during the class is compiled
>> (eg: ifdef1 = true => String[] javaarray = {"lib1"}). Do you know any
>> idea for this problem?
>
> Run the Java code through the C preprocessor with the same defines.
>
> String[] javaarray = {
> "None"
> #ifdef lib1
> ,"lib1"
> #endif
> #ifdef lib1
> ,"lib1"
> #endif
> };

I do not think it's worthwhile to open that can of worms for this 
decision.  After all getting rid of the CPP is one of the major 
advantages of Java over C++ (even Stroustrup regrets not having ripped 
it out of C++) and complicating the Java build process just for that 
decision seems too heavy - especially since there are other solutions 
available.

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Thread

preprocessor idea Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-11 20:19 +0200
  Re: preprocessor idea Robert Klemme <shortcutter@googlemail.com> - 2011-10-11 21:57 +0200
    Re: preprocessor idea markspace <-@.> - 2011-10-11 13:14 -0700
  Re: preprocessor idea Arne Vajhøj <arne@vajhoej.dk> - 2011-10-11 19:17 -0400
    Re: preprocessor idea Robert Klemme <shortcutter@googlemail.com> - 2011-10-13 18:35 +0200
      Re: preprocessor idea Arne Vajhøj <arne@vajhoej.dk> - 2011-10-13 22:49 -0400
        Re: preprocessor idea Robert Klemme <shortcutter@googlemail.com> - 2011-10-16 23:56 +0200
          Re: preprocessor idea Arne Vajhøj <arne@vajhoej.dk> - 2011-10-16 22:32 -0400
            Re: preprocessor idea Robert Klemme <shortcutter@googlemail.com> - 2011-10-17 18:53 +0200
  Re: preprocessor idea Roedy Green <see_website@mindprod.com.invalid> - 2011-10-12 07:04 -0700

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