Boris Kolpackov boris at codesynthesis.com
Fri May 31 11:13:02 EDT 2013
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Hi Andrey, Andrey Devyatka <an9bit at gmail.com> writes: > Please tell me, can I use the static library in the following case: >> [...] This is exactly the same issue that we've discussed just a few days ago: http://www.codesynthesis.com/pipermail/odb-users/2013-May/001286.html Because your application doesn't directly reference any symbols from library-odb.cxx, the linker ignores library-odb.o from library.a. As a result the schema creation code does not end up in the executable. Normally this is not a problem since most application executables will also include code that persists objects, etc., which will force the linker to include all the object files from the library. In your test, however, all you do is create the schema. As mentioned in the above email, with GNU ld you can use the --whole-archive option to force the linker to include every object file from your static library: > $ g++ -o test2 main.o library.a -lodb-sqlite -lodb g++ -o test2 main.o -Wl,-whole-archive library.a -Wl,-no-whole-archive -lodb-sqlite -lodb Another thing that you may find useful is the 'separate' value for the --schema-format option. It will trigger the generation of the schema creation code as a separate C++ source file (library-schema.cxx). You can then perhaps link it directly to your executable instead of packaging it into a static library. See the ODB compiler command line documentation (man pages) for more information on this option. Boris
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