This is the mail archive of the mailing list for the Cygwin project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Linking with JNI Invoke Using Cygwin gcc

Hi Tom - There is a quirk when using the JNI Invocation API on Cygwin (non-invocation JNI works as expected).  The solution is documented nicely at the excellent JNI-on-Cygwin webpage:  You can also download some sample JNI code, including both invocation- and non-invocation-code at

Alan Thompson

At 04:21 PM 6/5/2003 -0500, Thomas X. Hoban wrote:

>I have written a DLL and a test program that uses the JNI api to invoke a
>JVM.  When I try to link with a test program, I get an error indicating that
>a reference to __imp__JNI_CreateJavaVM@12 is undefined.
>$ export JAVA_HOME=/cygdrive/c/j2sdk1.4.1_02
>$ g++ -c ­I$JAVA_HOME/include ­I$JAVA_HOME/include/win32 JavaGateway.c++
>$ g++ -I$JAVA_HOME/include ­I$JAVA_HOME/include/win32 ­L$JAVA_HOME/lib \
>-ljvm JavaGateway.o -o testGateway testGateway.c++
>The link command above produces these errors:
>JavaGateway.o(.text+0x171):JavaGateway.c++: undefined reference to
>JavaGateway.o(.text+0x251):JavaGateway.c++: undefined reference to
>collect2: ld returned 1 exit status
>I assume that the jvm.lib file provided with the sdk was compiled with MS
>VC++.  Does the cygwin gcc compiler massage the symbol references
>differently from MS?  Does anyone have a suggestion on how I can make this

Unsubscribe info:
Problem reports:

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]