failed to link in Ubuntu 20.04

[keepsimple1]

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I'm using curl 0.4.42. My program built OK on macOS, but failed to build on Ubuntu 20.04 due to many linker errors:

Two examples are:

          /usr/include/openssl/x509.h:85: undefined reference to `OPENSSL_sk_num'
          /usr/include/openssl/x509.h:85: undefined reference to `OPENSSL_sk_value'

I installed libc6-dev, libssl-dev and libcurl4-openssl-dev, but did not resolve the errors. What are I missing to fix these linker errors? Thanks.

[real-felix]

I get the same kind of error on Fedora, even though I installed openssl-devel and libcurl-devel. Did you solve your issue?

undefined reference to `EVP_PKEY_id'
undefined reference to `SSL_get_peer_certificate'
undefined reference to `EVP_PKEY_id'
undefined reference to `SSL_get_peer_certificate'