Hi,

I'm need to link some C modules to a Lazarus app.

I started with just a minimal console app, and one module, I've created with h2pas the binding module, and edited to make it compile properly, but when it comes to link I get the "cannot find" error.

I tried both a mymodule.o object and a mymodule.so shared object.

I tried putting the .o/.so in the source directory, in the unit directory, and in /usr/lib64 directory (with an ldconfig to update ld cache).

I tried declaring the external library just with the module name, and with the full path.

I tried adding the path where the .o/.so file is located in the -Fl path of the Compiler Options.

The result is always the same: cannot find -lwhatever, with "whatever" reflecting exactly my external library path/name.

I'm missing?

Giuliano

Probably not your case but when you add manually libs to system (/usr/lib or /usr/local/lib), you need to run ldconfig
as superuser in terminal so the system rescans available libraries. ?
V.

Il 21/02/2016 16:29, Vojt?ch ?ih?k ha scritto:

I'm aware of that, and I did it, but no luck:-(

Giuliano

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On Sun, 21 Feb 2016 15:46:37 +0100, Giuliano Colla () wrote about "[Lazarus] /usr/bin/ld:
cannot find -lwhatever" (in ):

[snip]

I tried adding the path where the .o/.so file is located in the -Fl path of the Compiler Options.

You should not put .o files into library directories. You should use the ar command to build a library and put the resulting .a file into you library directory.

E.g.,

ar -crs libsomething.a something.o

Then put libsomething.a into /usr/local/lib; then use ldconfig (or SuSEconfig if you're using SuSE linux) to refresh the ld cache.

This is documented in man 1 ar.
- --
Regards,

Dave [RLU #314465]
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* (David W Noon)
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Il 21/02/2016 18:41, David W Noon ha scritto:

Thanks a lot. I wasn't aware that I must prepend *lib* to the library name. Just renaming my link to something.so into libsomething.so did the trick!

Giuliano