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I've been using the following Makefile syntax with building cygwin applications: $(PROJ_DLL) $(PROJ_SAR): product_dirs $(PROJ_OBJS) $(CXX) $(LCXX_SARFLAGS) -Wl,--out-implib=$(PROJ_SAR) \ -o $(PROJ_DLL) $(PROJ_OBJS) $(LCXXFLAGS) This is exactly what is in the cygwin documentation, but generalized for Makefiles. It has succesfully generated executables since way back, and was still working for cygwin 1.15.18-3, however since I've upgraded to 1.15.19-4 it fails. The behavior is this: Output from compile and build steps produce the expected linking messages. No apparent errors. However, applications die at dlopen. Example (1): importing a shared library (journal) through python $ python -v ... >>> import journal import journal # directory /home/mmckerns/tools/.../journal ... dlopen("/home/mmckerns/tools/.../_journalmodule.dll", 2); python dies here, and exits with no error. That lead me to writing a little test script to check the behavior of the .dll in C (without python). Example (2): testing a shared library (journal) with dlopen & dlerror $ ./dlopen.exe .dll TEST... the executable dies here, and exits with no error or print (please see attached dlopen.c) I have a feeling that this might be related to previous reports (such as http://sourceware.org/ml/cygwin/2006-04/msg00073.html and http://sourceware.org/ml/cygwin/2006-04/msg00036.html), but I am not sure. --- Mike McKerns California Institute of Technology
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