Hi guys, I am a novice about openssl. I encounter linker error when I try to compile evp demos which locate openssl/demos/evp. My computer info is: Darwin Kernel Version 14.4.0: Thu May 28 11:35:04 PDT 2015; root:xnu-2782.30.5~1/RELEASE_X86_64 And I use both gcc and clang with command ?cc -g -Wall -I../../include -lcrypto aesgcm.c" to compile the source code. The error info shows: Undefined symbols for architecture x86_64: "_EVP_aes_256_gcm", referenced from: _aes_gcm_encrypt in aesgcm-093314.o _aes_gcm_decrypt in aesgcm-093314.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) Please help me. I will be very appreciate. Br, Great Soul soul.great at me.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150723/1a685b3b/attachment-0001.html>