libcurl.so.4 undefined reference error

Question

Even after installation of curl and all concerned libcurl packages such as

curl libcurl3 libcurl3-gnutls
libcurl4-doc
libcurl4-nss-dev
libcurl-ocaml
libcurl3-dbg
libcurl3-nss
libcurl4-gnutls-dev
libcurl4-openssl-dev
libcurl-ocaml-dev

I get errors such as ,

/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_use_certificate_chain_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_verify@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_STRING_type@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `CRYPTO_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_shutdown@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_verify_result@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `d2i_PKCS12_fp@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `EVP_cleanup@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_write@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_peek@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BIO_new@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_set_fd@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_privatekey@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BN_num_bits@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_connect@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `DES_set_odd_parity@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_egd@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_srp_password@OPENSSL_1.0.1'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_get_pubkey@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_init@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_set_connect_state@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_get_cert_store@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_NAME_get_entry@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_free_strings@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_add@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_ctrl@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `sk_pop_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BIO_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `GENERAL_NAMES_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_get_id@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_library_init@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_ctrl@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_STRING_print@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_NAME_ENTRY_get_data@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_get_next@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_get_error@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_file_name@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `CRYPTO_cleanup_all_ex_data@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_default_passwd_cb_userdata@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_use_certificate_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BN_bn2bin@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_peer_cert_chain@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_check_issued@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_clear_error@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_pending@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BIO_s_mem@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `EVP_PKEY_copy_parameters@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSLv23_client_method@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_add_client_CA@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_use_PrivateKey@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_get_serialNumber@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_callback_ctrl@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD4_Update@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD4_Final@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `PEM_read_X509@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSLeay@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_get_first@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_get_subject_name@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD5_Final@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_load_builtin_engines@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_ctrl@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509V3_EXT_print@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_load_error_strings@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_set_session@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_NAME_get_index_by_NID@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_ctrl_cmd@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `TLSv1_client_method@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_check_private_key@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_by_id@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_certificate@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSLv3_client_method@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_verify_cert_error_string@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_peer_certificate@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_new@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `OPENSSL_add_all_algorithms_noconf@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `sk_value@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_use_PrivateKey_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_EXTENSION_get_object@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_INTEGER_get@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_get_ext_d2i@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_load_crl_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_cipher_list@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `DES_set_key@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get1_session@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_peek_error@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_STORE_add_lookup@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_current_cipher@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_STRING_to_UTF8@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_load_private_key@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `PEM_write_bio_X509@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_finish@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD4_Init@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `CRYPTO_malloc@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `PKCS12_PBE_add@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_cleanup@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD5_Init@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `PKCS12_parse@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `UI_OpenSSL@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_get_issuer_name@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `EVP_PKEY_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_get_error@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_default_passwd_cb@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_error_string_n@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `BIO_ctrl@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_new@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_shutdown@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_STORE_CTX_get_current_cert@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_SESSION_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_STRING_length@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `sk_pop@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `DES_ecb_encrypt@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_status@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_LOOKUP_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_use_certificate@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_STORE_set_flags@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_read@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ENGINE_set_default@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ASN1_STRING_data@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_set_srp_username@OPENSSL_1.0.1'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_load_file@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CTX_load_verify_locations@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `i2t_ASN1_OBJECT@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_remove_thread_state@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `RAND_bytes@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `MD5_Update@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `SSL_CIPHER_get_name@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_EXTENSION_get_critical@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `PKCS12_free@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `sk_num@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `ERR_error_string@OPENSSL_1.0.0'
/usr/lib/x86_64-linux-gnu/libcurl.so.4: undefined reference to `X509_NAME_print_ex@OPENSSL_1.0.0'
collect2: error: ld returned 1 exit status

Any help appreciated

Is there a libcurl4 package you could add to that list? – Flup Apr 22 '14 at 08:36 — Flup, Apr 22 '14 at 08:36

Andreas Wiese · Answer 1 · 2014-04-22T11:31:26.210

7

The problem is not that there's a _curl_ library missing but that libcurl.so.4 references functions of a library that is not found. As one can suggest from the names of the missing functions, this should be libssl.

You can investigate which exact library is missing by using ldd on libcurl.so:

$ ldd /usr/lib/x86_64-linux-gnu/libcurl.so.4

It will report missing libraries to you like

libssl.so.1.0.0 not found

edited Apr 22 '14 at 11:31

answered Apr 22 '14 at 08:39

Andreas Wiese

10,400

im trying to install associated libssl libraries hopefully it might solve the issue – Altanai Bisht Apr 22 '14 at 11:33

score 0 · Accepted Answer · answered Jun 03 '15 at 21:35

It appears that libssl no longer contains symbols starting SSLv3. Instead, you should compile [insert whatever it is] against libgnutls-openssl.

I'm talking from the point of view of investigating why curl won't link in that symbol at runtime on debian stable (jessie). Recompiling curl addding a few -lgnutls-openssl into CFLAGS in the Makefiles seems to do the trick.

I have a suspicion how the confusion comes about, but little inclination to interrogate anyone about it!

JoeVictor · Answer 3 · 2023-09-14T03:17:40.327

For those reading this in the far future and getting similar unresolved reference errors ending in:

...@OPENSSL_3.X.X'

This is because curl or some other library dependent on OpenSSL 3+ can't find it. Your machine may be running an older version (verifiable by running openssl version)

I resolved it by installing OpenSSL 3.0.10 by following the commands in this guide

After you've fixed your install, don't forget to link the libraries. If using CMake:

link_libraries(crypto ssl curl)

If using make:

-lssl -lcrypto -lcurl

libcurl.so.4 undefined reference error

3 Answers3