问题
I am implementing a OpenSSL code and have already included required header files but still I am getting errors like *
undefined reference to
SSL_library_init
I guess it's a linking error rather than a compilation error.
I am implementing it in Linux box using slickeditor.
回答1:
Link against libssl and libcrypto. Your LDFLAGS and LDLIBS would be as follows. Order matters for LDLIBS:
LDFLAGS = -L/usr/local/ssl/lib
LDLIBS = -lssl -lcrypto
Don't worry about adding the "lib" in front of library name, or the "so" or "a" suffix. The linker will do it for you.
If you are building from the command line, then you would use the following. Again, order matters.
gcc foo.c -o foo.exe -L/usr/local/ssl/lib -lssl -lcrypto
If you are using the system's OpenSSL, then you can omit -L/usr/local/ssl/lib.
回答2:
For me this meant to install
apt install libssl1.0-dev
回答3:
ldd libssl.so -> libcrypto.so.1.1 => not found
sudo ln -s /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1
libcrypto.so.1.1 => /lib64/libcrypto.so.1.1 (0x00007f17d46c7000)
来源：https://stackoverflow.com/questions/5593284/undefined-reference-to-ssl-library-init-and-ssl-load-error-strings