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From: Edwin.Madari@VerizonWireless.com
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Subject: building JCC with gcc4.x on Cygwin windows:jvm_NULL_THUNK_DATA symbol
 not found 
Date: Thu, 4 Jun 2009 13:39:57 -0400
Thread-Topic: building JCC with gcc4.x on Cygwin windows:jvm_NULL_THUNK_DATA
 symbol not found 
Thread-Index: AcnlO3OvFpHfsBSOQsS5332CgZpKAg==
To: <pylucene-dev@lucene.apache.org>
Message-Id: <20090604174127.6B3E1816046@nike.apache.org>

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getting jvm_NULL_THUNK_DATA not found error in the last step of building JC=
C on Cygwin/windows with "python setup.py build" after switching to gcc ver=
sion 4.3.2 20080827 (beta) 2 (GCC) with Advise from Andi V, and Christian H=
.  gcc4x is available from Cygwin, but not as default -do not know why.=20

String jvm_NULL_THUNK_DATA exists in  jvm.lib as can be seen below. This st=
ring appears 4 times, (included only once for this mail)

$ strings /c/Edwin/Programs/Java/jdk1.6.0_13/lib/jvm.lib | grep THUNK
jvm_NULL_THUNK_DATA

For simplicity replaced all object file names from following command with "=
*.o" below.

$ g++ -shared -Wl,--enable-auto-image-base *.o  -L/usr/lib/python2.5/config=
 -lpython2.5 -o build/lib.cygwin-1.5.25-i686-2.5/jcc/_jcc.dll -L/c/Edwin/Pr=
ograms/Java/jdk1.6.0_13/lib -ljvm -Wl,-S
Cannot export jvm_NULL_THUNK_DATA: symbol not found
collect2: ld returned 1 exit status
error: command 'g++' failed with exit status 1

it must be something simple or trivial I must be missing - any ideas/sugges=
tions?

thanks in advance
Edwin


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