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5282 :: link with dynlib contains main

• Lachu (orginal) [2019-10-04T17:13:41+02:00] view original

  Dynamic Load Libraries/Shared Objects under GNU/Linux and Windows can contain something like main procedure from C. I will call it start point. I compile shared object and now try to link it with my program. This shared object only contains echo instruction for testing purpose. How to link it? I tries to use --clib="libcommon.so", but it searches it in current directory - placement, where executable file exist. When I modify path to point to library (path is correct), linker told me file not exists.

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• Lachu (orginal) [2019-10-05T14:34:04+02:00] view original

  First problem are solved, but... main function of libraries written in NIM wasn't called. I use -l="-Lpath_relative_to_main_project_dir -llib_name" (Of course, I skip extension and lib prefix). What I must said: When using --clib, NIM append directory path of file currently compiled, so in result I've got /home/slawomir/postep/src/executables/path_realtive_to_main_dir/lib_name

  I decided to create function called a just like this:

  proc a {.exportc, cdecl.} = echo "a"

  And import it just like this:

  proc a {.importc, cdecl.}

  But have this error, when calling

  /home/postep/src/executables/postep.nim(8, 12) Error: expression 'a()' has no type (or is ambiguous)

  I call this function in this way:

  discard a()

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