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Editorial Team
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Editorial Team
Asked: June 14, 20262026-06-14T10:09:53+00:00 2026-06-14T10:09:53+00:00

gcc compiler giving me error as undefined reference to `EVP_bf_cbc’ I user command to

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gcc compiler giving me error as

undefined reference to `EVP_bf_cbc’

I user command to compile as gcc -o CSHARE main.c

main.c includes call of function EVP_bf_cbc().
I have included openssl/evp.h

How can I link to the library where function like EVP_bf_cbc() is implemented.

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  1. Editorial Team
    Editorial Team
    2026-06-14T10:09:55+00:00Added an answer on June 14, 2026 at 10:09 am

    you have to tell it which libs to link using ‘-l’, like this

    gcc -lssl -lcrypto -o CSHARE main.c

    I think you might need both ‘-lssl’ and ‘-lcrypto’, not sure.

    Colum

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