building JNA / native on MingW

[Daniel Doubrovkine]

I had a working build environment on my Win7/64 with mingw.

Some recent update seems to have broken it. Got gcc 4.6.2, headers updated, etc. Anyone knows what this is?

     [exec] In file included from c:/Users/dblock/Source/GitHub/jna/dblock/native/libffi/src/closures.c:112:0:

     [exec] c:\mingw\bin\../lib/gcc/mingw32/4.6.2/../../../../include/string.h:38:40: error: expected declaration specifiers or '...' before '(' token

     [exec] c:\mingw\bin\../lib/gcc/mingw32/4.6.2/../../../../include/string.h:38:40: error: expected declaration specifiers or '...' before '(' token

     [exec] c:\mingw\bin\../lib/gcc/mingw32/4.6.2/../../../../include/string.h:38:40: error: expected declaration specifiers or '...' before '(' token

     [exec] In file included from c:/Users/dblock/Source/GitHub/jna/dblock/native/libffi/src/closures.c:233:0:

     [exec] c:/Users/dblock/Source/GitHub/jna/dblock/native/libffi/src/dlmalloc.c: In function 'internal_realloc':

     [exec] c:/Users/dblock/Source/GitHub/jna/dblock/native/libffi/src/dlmalloc.c:3894:9: warning: implicit declaration of function 'bcopy' [-Wimplici

t-function-declaration]

     [exec] c:/Users/dblock/Source/GitHub/jna/dblock/native/libffi/src/dlmalloc.c:3894:9: warning: incompatible implicit declaration of built-in funct

ion 'bcopy' [enabled by default]

     [exec] make[3]: *** [src/closures.lo] Error 1

     [exec] make[2]: *** [all-recursive] Error 1

     [exec] make[1]: *** [all] Error 2

     [exec] make: *** [../build/native-win32-x86/libffi/.libs/libffi.a] Error 2

Thanks,

dB.

--

dB. | Moscow - Geneva - Seattle - New York
dblock.org - @dblockdotorg - artsy.net

[Timothy Wall]

That kinda looks like the same issue that Dan Rollo was getting. I'm still using gcc3 on XP; I'd have to check the mingw versions, but I've never been able to reproduce.

Fundamentally memcpy support is not being found, which results in a (broken) fallback to bcopy. Dan has a workaround PR posted that might work for you.

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[Daniel Doubrovkine]

Oh I remember that, it worked. Thanks!

https://github.com/twall/jna/pull/142 for reference.

[Daniel Doubrovkine]

Fyi, after carefully reading https://github.com/twall/jna/blob/master/www/WindowsDevelopmentEnvironment.md I got it working. Needed the 64-bit version of MingW, JAVA_HOME that is set to the 64-bit version of the JDK, and CC=mingw edited in Makefile. 

I did clarify those instructions a bit for future reference, too.