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The header is irrelevant to linking, unless it contains macros that change the names of external symbols. My guess is that you need -L/usr/local/openssl/lib, or something along those lines, on your gcc command line. I suspect you're linking against normal OpenSSL
libraries installed elsewhere on your system, and not against the ones you built. This is not specific to OpenSSL, by the way; it's all standard UNIX / Linux library use. Michael Wojcik
From: openssl-users [mailto:openssl-users-bounces@xxxxxxxxxxx]
On Behalf Of Schmicker, Robert Hello, I am attempting to add a new cipher into the crypto library. I have done the following so far… 1. Added my code to the openssl/crypto folder 2. Created a build.info for make to compile my code (created this based off of openssl/crypto/dh’s build.info) 3. Added my cipher name to the list of ciphers to compile in Configure 4. Compiled and installed all code without errors and object files for my new cipher are created in openssl/crypto/mycipher/ 5. Created a test.c file that verifies that the library is installed and working properly by generating a MD5 hash of a string Compiled as: gcc test.c -I/usr/local/openssl/include/openssl/ -o test -lcrypto -lssl -Wall 6. I am able to properly include <openssl/mycipher.h> in my test.c file However, as soon as I make a call to my cipher in test.c I get a linker error and gcc is unable to find any of my functions. It seems that the header file I have in the openssl/include folder isn’t being linked somehow to my code in the openssl/cypto folder. I feel like I’m missing a step here… Any help is much appreciated! Rob |
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