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From:	"DeTracey, Brendan" <Brendan DOT DeTracey AT dfo-mpo DOT gc DOT ca>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	Building cdo
Date:	Thu, 11 Dec 2014 17:31:41 +0000
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Hi,

I am trying to build cdo (https://code.zmaw.de/projects/cdo) from source and have a common problem:
*** Warning: This system can not link to static lib archive /usr/local/lib/libsz.la.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have.

I looked at my build of libsz (from hdf's szip http://www.hdfgroup.org/HDF5/release/obtain5.html#extlibs ) and even though I specified --enable-shared it did not build the shared libraries. Why is this?

I looked at libsz.la and manually built a dll from the object files:
gcc -shared -o libsz.dll rice.o sz_api.o encoding.o
but copying the resulting libsz.dll to /use/local/lib is not enough for the cdo build to recognize it as the shared library. It still tries to link to libsz.la
Do I need  *.dll.a for libsz? How do I do this and where do I put the final libsz.dll and corresponding libsz.dll.a?

Pointing me to any documentation would be appreciated. All I have found is Building and Using DLL's in the Cygwin users manual.

Thanks,
Brendan

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