After upgrading to ubuntu 22.04, I get the linker error below for a project that previously built successfully.

OpenSSL 3.0.2 15 Mar 2022 (Library: OpenSSL 3.0.2 15 Mar 2022)

LDC - the LLVM D compiler (1.27.1):
based on DMD v2.097.2 and LLVM 12.0.1
built with LDC - the LLVM D compiler (1.27.1)
Default target: x86_64-unknown-linux-gnu
Host CPU: skylake
http://dlang.org - http://wiki.dlang.org/LDC

vibe-d-0.9.5-beta.1

I tried unsuccessfully to also install an earlier version of OpenSSL

Any suggestions?

Compiling Diet HTML template test.dt...
Linking...
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:284: error: undefined reference to 'SSL_get_peer_certificate'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:625: error: undefined reference to 'SSLv23_client_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:626: error: undefined reference to 'SSLv23_client_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:630: error: undefined reference to 'SSLv23_client_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:631: error: undefined reference to 'SSLv23_client_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:638: error: undefined reference to 'SSLv23_server_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:639: error: undefined reference to 'SSLv23_server_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:641: error: undefined reference to 'SSLv23_server_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:642: error: undefined reference to 'SSLv23_server_method'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:906: error: undefined reference to 'get_rfc3526_prime_2048'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1100: error: undefined reference to 'SSL_load_error_strings'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1101: error: undefined reference to 'SSL_library_init'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1103: error: undefined reference to 'CRYPTO_num_locks'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1111: error: undefined reference to 'CRYPTO_set_id_callback'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1112: error: undefined reference to 'CRYPTO_set_locking_callback'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1117: error: undefined reference to 'SSL_get_ex_new_index'
home/gavin/.dub/packages/openssl-1.1.6_1.0.1g/openssl/deimos/openssl/safestack.d:140: error: undefined reference to 'sk_num'
home/gavin/.dub/packages/openssl-1.1.6_1.0.1g/openssl/deimos/openssl/safestack.d:142: error: undefined reference to 'sk_value'
home/gavin/.dub/packages/vibe-d-0.9.4/vibe-d/tls/vibe/stream/openssl.d:1380: error: undefined reference to 'ERR_put_error'
collect2: error: ld returned 1 exit status
Error: /usr/bin/cc failed with status: 1
/home/gavin/dlang/ldc-1.27.1/bin/ldc2 failed with exit code 1.

On Wednesday, 18 May 2022 at 20:41:53 UTC, Gavin Gray wrote:

After posting I noticed the actual version of vibe was 0.9.4. Upgraded to vibe 0.9.5.beta.1 and now it linked successfully.

Therefore no longer an issue!