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Re: undefined symbol: curl_multi_poll

From: Samuel Colque Flores via curl-library <>
Date: Tue, 16 Nov 2021 18:50:26 -0400

I ran into the same problem. My problem arose when the link to libssl
seemed broken in the output of `make test' (before install).

I did not stop and the output I got after install:
$ sudo make install
$ curl --version
curl: symbol lookup error: curl: undefined symbol: curl_multi_poll

It's worth to point out that the executable
`/usr/local/bin/curl-config' works independently of
`/usr/local/bin/curl', so, this is how I configured curl:
$ `curl-config --configure'
 '--with-openssl' '--with-libssh2' 'LDFLAGS=-L/usr/local/lib64 -L/usr/local/lib'

1. I visited the following link:
`'. Then,
I suspected that the links to libssl appear unknown to I
needed to run ldconfig(8). Actually, was unable to find So I followed the step:
$ sudo ldconfig
$ curl --version
curl: error while loading shared libraries: cannot open
shared object file: No such file or directory

2. After reading the man pages of ldconfig(8), I realized that
libraries under /usr/local/lib64 were not found by My thanks
to GOD.
$ sudo ldconfig /usr/local/lib64
$ curl --version
curl 7.80.0 (x86_64-pc-linux-gnu) libcurl/7.80.0 OpenSSL/3.0.0
zlib/1.2.11 libssh2/1.10.0
Release-Date: 2021-11-10
Protocols: dict file ftp ftps gopher gophers http https imap imaps
mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS HSTS HTTPS-proxy IPv6 Largefile libz NTLM

Your problem might have been resolved at step 1.

The comment of Dan Fandrich about setting the LD_LIBRARY_PATH
environment variable was the main cue in solving this problem.

GOD bless you all.

> [...]
> I used the following command to configure:
> ``` ./configure --with-libssh2=/usr/local --with-secure-transport ```
> When I type curl -V it throws the error
> "/usr/local/bin/curl: symbol lookup error: /usr/local/bin/curl: undefined
> symbol: curl_multi_poll"
> [...]
> What is wrong? Is there a version mismatch? I am installing libssh2-1.9.0 and
> curl-7.77.0
Received on 2021-11-16