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POLinking Free Pascal programs to include dependencies
 

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    <p>I have two Free Pascal units that I would like to use from a C program on linux.</p> <p>Here is what I do:</p> <pre><code>$ fpc -fPIC base64.pas queueutils.pas Warning: Only one source file supported Free Pascal Compiler version 2.2.2 [2008/11/05] for x86_64 Copyright (c) 1993-2008 by Florian Klaempfl Target OS: Linux for x86-64 Compiling queueutils.pas queueutils.pas(2088,11) Warning: Symbol "Socket" is deprecated queueutils.pas(2097,10) Warning: Symbol "Connect" is deprecated queueutils.pas(2104,3) Warning: Symbol "Sock2Text" is deprecated 2432 lines compiled, 0.5 sec 4 warning(s) issued $ ppumove -o queueutils -e ppl *.ppu PPU-Mover Version 2.1.1 Copyright (c) 1998-2007 by the Free Pascal Development Team Processing base64.ppu... Done. Processing queueutils.ppu... Done. Linking queueutils.o base64.o Done. </code></pre> <p>Seems fine so far, libqueueutils.so is created:</p> <pre><code>$ file libqueueutils.so libqueueutils.so: ELF 64-bit LSB shared object, AMD x86-64, version 1 (SYSV), not stripped $ ldd libqueueutils.so ldd: warning: you do not have execution permission for `./libqueueutils.so' statically linked </code></pre> <p>However when the C program tries to use the library this way:</p> <pre><code>libqueue = dlopen("./libqueueutils.so", RTLD_LAZY); if (!libqueue) { fprintf (stderr, "%s\n", dlerror()); } </code></pre> <p>it yields an error message:</p> <pre><code>$ ./tmbrkr ./libqueueutils.so: undefined symbol: VMT_PROCESS_TPROCESS </code></pre> <p>This VMT_PROCESS_TPROCESS-related error is resolved if I add process.o and process.ppu to the linking process done by ppumove. However after doing so another unit is missing and after that another... You get it.</p> <p>Is there a way to somehow link all the necessary units together in one .so file so that the C program can dlopen() the library properly?</p>
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