Re: [CsMain] CS bindings ...

On 12/30/2010 9:34 PM, Sp4M wrote:
> I followed your suggestions and installed MSYS/MinGW.
> Quite everything looks fine when I ./configure, but the java SDK usability.
> *Problem 1)*
> Extract of the config.log
>     /configure:14689: checking if Java SDK is usable/
>     /configure:14802: gcc -o conftest.exe
>       -I/F/PROG/CrystalSpaceLibs/mingw/include
>     -I/F/PROG/CrystalSpaceLibs/common/include
>       -I/F/PROG/CrystalSpaceLibs/mingw/include
>     -I/F/PROG/CrystalSpaceLibs/common/include
>       -L/F/PROG/CrystalSpaceLibs/mingw-gcc-4.5/lib
>     -L/F/PROG/CrystalSpaceLibs/mingw/lib
>     -L/F/PROG/CrystalSpaceLibs/common/lib conftest.c >&5/
>     /conftest.c:30:19: fatal error: jni.h: No such file or directory/

This extract is probably too short. You need to look at everything 
between the "checking if..." message and the final "no" message. There 
should be a series of "gcc" attempts (five or more) before the final 
"no". Some or all of them will be failures (depending upon platform and 
setup).

> I tried to add '/F:\PROG\Java\jdk1.4\jdk\include/' and
> '/F:\PROG\Java\jdk1.4\jdk\include\win32/' to the PATH: same problem.

To PATH, you should add the path containing java.exe. Alternately, as I 
recall, you can set JAVAHOME to the root of the Java installation. In 
either case, the configure check will query java.exe for the location of 
the Java headers and libraries.

> I tried to by-pass the problem by calling: configure "CPPFLAGS=$CPPFLAGS
> -I/F/PROG/Java/jdk1.4/jdk/include -I/F/PROG/Java/jdk1.4/jdk/include/win32"
> Here it seems to find jni.h correctly, but ...
> *Problem 2)*
> Extract of the config.log
>     /configure:14689: checking if Java SDK is usable/
>     /configure:14802: gcc -o conftest.exe
>       -I/F/PROG/CrystalSpaceLibs/mingw/include
>     -I/F/PROG/CrystalSpaceLibs/common/include
>       -I/f/PROG/Java/jdk1.4/jdk/include/
>     -I/f/PROG/Java/jdk1.4/jdk/include/win32
>     -I/F/PROG/CrystalSpaceLibs/mingw/include
>     -I/F/PROG/CrystalSpaceLibs/common/include
>       -L/F/PROG/CrystalSpaceLibs/mingw-gcc-4.5/lib
>     -L/F/PROG/CrystalSpaceLibs/mingw/lib
>     -L/F/PROG/CrystalSpaceLibs/common/lib conftest.c >&5/
>     /C:\Users\Sp4M\AppData\Local\Temp\ccKB2qIc.o:conftest.c:(.text+0x2e): undefined
>     reference to `_imp__JNI_GetCreatedJavaVMs@12'/
>     /collect2: ld returned 1 exit status/

Are the paths in the -L directives correct? Also, in the above output, I 
don't see it actually linking against the Java libraries.

> Question 1: Can we consider to find a better way to solve the jni.h
> finding problem ?

See above about making sure that java.exe is found. It should be 
automatic. If that isn't working, then we need to determine why.

> Question 2: Do you have an idea about this second error ? I read some
> stuff about ld version, or jvm.dll, tried many things, but nothing worked.

We will need to determine why it is not linking with the library.

-- ES

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