[SOLVED] Cannot compile curl demo "testcurl.pp" => Linker error
(Linux)
lazarus / 38-Networking and Web Programming

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Hartmut · 2022-02-03 14:13

In FPC 3.2.0 there is a curl demo in
.../fpcsrc/packages/libcurl/examples/testcurl.pp. When I try to
compile it, I get a Linker error:

Code: Text  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i Hint:
(11030) Start of reading config file
/opt/lazarus_210/fpc/bin/x86_64-linux/fpc.cfgHint: (11031) End of
reading config file
/opt/lazarus_210/fpc/bin/x86_64-linux/fpc.cfg/usr/bin/ld: -lcurl kann
nicht gefunden werden (translated: "-lcurl can not be found")Note:
(11046) DWARF debug information cannot be used with smart linking on
this target, switching to static linkingFree Pascal Compiler version
3.2.0-r45643 [2020/12/20] for x86_64Copyright (c) 1993-2020 by Florian
Klaempfl and others(1002) Target OS: Linux for x86-64(3104) Compiling
testcurl.pas(9015) Linking
/hg/utis/testcurl/media/D/FPC/work/einmal/testcurl.pas(44,1) Error:
(9013) Error while linking/media/D/FPC/work/einmal/testcurl.pas(44,1)
Fatal: (10026) There were 1 errors compiling module, stoppingFatal:
(1018) Compilation abortedError:
/opt/lazarus_210/fpc/bin/x86_64-linux/ppcx64 returned an error
exitcode
I'm on Linux Ubuntu 18.04 64-bit. In Packet Manager "Synapse" I can
see, that library "libcurl4" is installed. I think I found it in the
file system in folder /usr/lib/x86_64-linux-gnu/:

Code: Text  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
hg6@i3300:/usr/lib/x86_64-linux-gnu$ ls -l libcurl*lrwxrwxrwx 1 root
root     19 Sep 20 14:02 libcurl-gnutls.so.3 -> libcurl-
gnutls.so.4lrwxrwxrwx 1 root root     23 Sep 20 14:02 libcurl-
gnutls.so.4 -> libcurl-gnutls.so.4.5.0-rw-r--r-- 1 root root 522696
Sep 20 14:02 libcurl-gnutls.so.4.5.0lrwxrwxrwx 1 root root     16 Sep
20 14:02 libcurl.so.4 -> libcurl.so.4.5.0-rw-r--r-- 1 root root 530888
Sep 20 14:02 libcurl.so.4.5.0
I'm a bloody beginner to that library stuff. Thanks for help in
advance.

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mica · 2022-02-03 14:48

curl-devel lib missing?

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korba812 · 2022-02-03 14:51

You need to install libcurl-dev package.

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Hartmut · 2022-02-03 15:17

Thank you, mica and korba812, for your quick answers. I looked in
Packet Manager "Synapse" but did not find something with exactly the
name "libcurl-dev", only 9 similar to it (see attached screenshot).
Can you tell me, which of them is the right one?

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korba812 · 2022-02-03 16:29

I'm not sure, but it seems to be libcurl4-gnutls-dev.

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Hartmut · 2022-02-03 16:49

This was the solution! Thank you very much.