[Mingw-users] bad 32bit build

[Samuel H. <sam...@gm...>]

Hi all,

My MinGW cross-builds (from Linux for Windows 64 bit) seem to be working great.

However, the 32 bit builds are not working.

I am building Java native libraries and, although my library is loaded by a 32 bit JVM, any attempts to access the native function are resulting in an UnsatistiedLinkError.

e.g. I have a function in Java with signature

 double ddot(int, double[], int, double[], int)

the C signature is

 JNIEXPORT jdouble JNICALL Java_com_github_fommil_netlib_NativeRefBLAS_ddot
  (JNIEnv *, jobject, jint, jdoubleArray, jint, jdoubleArray, jint);

(note that jint is typedefd as a long, which is the same size as an int on Windows)

and the C implementation matches this.

I have checked the i686-w64-mingw32-objdump of my binary and it says the function is there:

[  22] Java_com_github_fommil_netlib_NativeRefBLAS_ddot@28


So what could be going wrong?

The bizarre thing is that the 64 bit build works fine, so this seems to be a problem I'm only experiencing with the MinGW 32 bit cross compiler.


-- 
Sam