No reference to BIO-functions when linking OpenSSL
12,097
I managed to compile your function by using :
gcc main.c -o main -I /usr/local/ssl/include -L /usr/local/ssl/lib -lssl -lcrypto -Wall
More explainations :
-I /usr/local/ssl/include
adds/usr/local/ssl/include
to the include search path.-L /usr/local/ssl/lib
adds/usr/local/ssl/lib
to the library search path.-lssl -lcrypto
links libraries libcrypto and libssl-lcrypto
must follow-lssl
becuase ld is a single pass linkerWall
enables all warnings.
My guess is that you are missing -lcrypto
.
Author by
S1J0
Updated on June 11, 2022Comments
-
S1J0 almost 2 years
I'm trying to compile a c-program with openssl-references. I'm using Linux Mint 17.1 and the development package "libssl-dev" is installed.
#include <openssl/bio.h> #include <openssl/err.h> #include <openssl/ssl.h> ... void send_smtp_request(BIO *bio, const char *req) { BIO_puts(bio, req); BIO_flush(bio); printf("%s", req); }
If I compile the code with:
gcc -o client bio-ssl-smtpcli2.c
I get the this error:
/tmp/ccCHrti2.o: In function 'send_smtp_request': bio-ssl-smtpcli2.c:(.text+0x1f): undefined reference to 'BIO_puts' bio-ssl-smtpcli2.c:(.text+0x3a): undefined reference to 'BIO_ctrl'
Does someone have an idea how to fix this?