Groups > comp.lang.java.programmer > #8776

Re: preprocessor idea

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Date	Thu, 13 Oct 2011 22:49:32 -0400
From	Arne Vajhøj <arne@vajhoej.dk>
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Subject	Re: preprocessor idea
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On 10/13/2011 12:35 PM, Robert Klemme wrote:
> 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.

What other solution achieve the same?

Arne

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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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