I am building a shared library (we'll call it "foo") that makes use of another library (we'll call it "bar"). "bar" makes use of some functions from OpenSSL.
Here's where the problem surfaces.
"bar" was compiled as a static library and it would appear that OpenSSL was too. So when I link the library ("foo"), I include the:
- object files for "foo"
- static library
libbar.a
- OpenSSL static libraries
libcrypto.a
andlibssl.a
The build command looks something like this:
g++ -Wl,-soname,libfoo.so -shared file1.o file2.o libbar.a \
libcrypto.a libssl.a -o libfoo.so
However, I get a ton of errors:
ld: ./obj/libbar.a(file1.c.o): in function initialize_openssl:
ssl.c:117: error: undefined reference to 'SSL_library_init'
Running the following command:
nm libssl.a | grep SSL_library_init
Produces the following output:
00000000 T SSL_library_init
So obviously there is nothing wrong with the OpenSSL libraries. What could have possibly caused something like this? Here are the three commands used to build OpenSSL:
export cross=arm-linux-androideabi-
./Configure android --prefix=~/openssl-arm
make CC="${cross}gcc" AR="${cross}ar r" RANLIB="${cross}ranlib"
The compilation process completed without any errors, so I'm utterly baffled.
Why am I getting linker errors that refer to a bunch of OpenSSL symbols that clearly exist?