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Groups > comp.lang.java.programmer > #8724

Re: preprocessor idea

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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
};

Arne

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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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