Error compiling with Ubuntu 18.04.4 LTS and OpenSSL 1.1.1

[luo4neck]

Hi I want to use this library but got this error during installation, any idea?

[ 47%] Built target cppcommon
Scanning dependencies of target cppserver
[ 47%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/ssl_client.cpp.o
[ 48%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/tcp_client.cpp.o
[ 48%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/ssl_server.cpp.o
[ 47%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/service.cpp.o
[ 48%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/ssl_context.cpp.o
[ 49%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/tcp_resolver.cpp.o
[ 50%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/ssl_session.cpp.o
[ 50%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/tcp_server.cpp.o
[ 50%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/tcp_session.cpp.o
/home/qiyuan/Downloads/CppServer/source/server/asio/service.cpp: In static member function ‘static void CppServer::Asio::Service::ServiceThread(const std::shared_ptr<CppServer::Asio::Service>&, const std::shared_ptr<asio::io_context>&)’:
/home/qiyuan/Downloads/CppServer/source/server/asio/service.cpp:218:5: error: ‘OPENSSL_thread_stop’ was not declared in this scope
     OPENSSL_thread_stop();
     ^~~~~~~~~~~~~~~~~~~
/home/qiyuan/Downloads/CppServer/source/server/asio/service.cpp:218:5: note: suggested alternative: ‘OPENSSL_realloc’
     OPENSSL_thread_stop();
     ^~~~~~~~~~~~~~~~~~~
     OPENSSL_realloc
[ 51%] Building CXX object CMakeFiles/cppserver.dir/source/server/asio/timer.cpp.o
CMakeFiles/cppserver.dir/build.make:62: recipe for target 'CMakeFiles/cppserver.dir/source/server/asio/service.cpp.o' failed
make[2]: *** [CMakeFiles/cppserver.dir/source/server/asio/service.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/Makefile2:899: recipe for target 'CMakeFiles/cppserver.dir/all' failed
make[1]: *** [CMakeFiles/cppserver.dir/all] Error 2
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2

[esppat]

Hi,

Did the ./unix.sh command wrote something like

-- OpenSSL version: 1.1.1 /usr/include /usr/lib/x86_64-linux-gnu/libssl.so;/usr/lib/x86_64-linux-gnu/libcrypto.so

at the beginning of its output?
I got this above line and everything is compiling fine in my case

[luo4neck]

hi @esppat
yes openssl 1.1.1 was found during installation, and I figured it out finally that this compilation issue was caused by some symlink issue

But got some trouble to use https client, so decided to use other library now

[championbarca]

I was also facing the same issue. Issue is due to linking -lssl -lcrypto before other libraries, just in sequence of linking.
Moving list(APPEND LINKLIBS ${OPENSSL_LIBRARIES}) below list(APPEND LINKLIBS cppserver), should fix the issue.