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+2 A:

You just need to add /usr/lib/pnglite.o to your linking invocation of gcc, plus any shared libraries that pnglite requires (from your comment it appears to require zlib). Eg if your source is in myapp1.c and myapp2.c, then:

gcc -c myapp1.c
gcc -c myapp2.c
gcc -o myapp myapp1.o myapp2.o /usr/lib/pnglite.o -lz

caf 2010-03-30 07:43:22

Thanks for the answer. I guess that would do it in common case. I tried that, but now I get many error messages referring to that pnglite.o saying "undefined reference to 'crc32' ". No idea what that's about.

zaplec 2010-03-30 08:04:19

Your linker fails because either your app or pnglite.o uses a resource crc32 that is not in the compiled object files or a shared library.. have you used the same shared libraries as when you builded without pnglib?

Erik 2010-03-30 08:29:13

@zaplec: The pnglite object appears to need to be linked against some shared libraries - for example `crc32` is in zlib, so you add `-lz` to the link line too (I have updated the answer).

caf 2010-03-30 08:35:00

Thanks caf. Now it's working and it's my mistake that I didn't read carefully enough that documentation of pnglite as it is said there that pnglite uses zlib.

zaplec 2010-03-30 14:37:36

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How to link pnglite library in c?

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