Correct way to use static openssl with self-builded Qt on Ubuntu

ludek.vodicka

Hi,

I'm not able to configure Qt to use OPENSSL compiled via vcpkg as a static library.

export OPENSSL_LIBS="$OPENSSL_PATH/lib_release/libcrypto.a $OPENSSL_PATH/lib_release/libssl.a -L$OPENSSL_PATH/lib_release -ldl -lpthread"
export OPENSSL_PREFIX=$OPENSSL_PATH
export OPENSSL_INCDIR=$OPENSSL_PATH/include 
export OPENSSL_LIBDIR=$OPENSSL_PATH/lib_release

./configure -openssl-linked ...

But result libQt5Network.so has a dynamic reference to /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1

    linux-vdso.so.1 (0x00007ffe2ef31000)
    libQt5Core.so.5 => /root/dev/SharedLibraries/qt/lib/libQt5Core.so.5 (0x00007f3b06ec1000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f3b06ca2000)
    libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f3b06a85000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f3b06881000)
    libssl.so.1.1 => /usr/lib/x86_64-linux-gnu/libssl.so.1.1 (0x00007f3b065f4000)
    libcrypto.so.1.1 => /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 (0x00007f3b06129000)
    libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f3b05da0000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3b059af000)
    libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f3b05698000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f3b052fa000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f3b050e2000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f3b07afb000)
    libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f3b04e70000)

I tried several configuration switches and methods on ./configure but still with the same result.

This is my complete configure script:

/root/dev/ExternalLibraries/librariesLinux/qt-everywhere-src-5.15.1/qtbase/configure -v -prefix /root/dev/ExternalLibraries/../SharedLibraries/qt -dbus -xcb-xlib -bundled-xcb-xinput -skip qt3d -skip activeqt -skip qtandroidextras -skip qtconnectivity -skip datavis3d -skip declarative -skip qtdoc -skip gamepad -skip qtgraphicaleffects -skip qtcharts -skip qtlocation -skip qtlottie -skip qtmultimedia -skip qtnetworkauth -skip qtpurchasing -skip qtquick3d -skip qtquickcontrols -skip qtquickcontrols2 -skip qtquicktimeline -skip qtremoteobjects -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qtvirtualkeyboard -skip qtwayland -skip qtwebengine -skip qtwebglplugin -skip qtwebchannel -skip qtwebsockets -skip qtwebview -skip qtxmlpatterns -no-opengl -no-openvg -nomake examples -nomake tests -confirm-license -opensource -D JAVASCRIPTCORE_JIT=NO -D ENABLE_JIT=0 -openssl-linked -skip qtscript

Thanks for any help

ludek.vodicka

I just found a reason. It's necessary to swap the order of libssl and libcrypto. This caused undefined references errors. But I'm not sure why ./configure doesn't report that.

This is incorrect test:

g++ -Wl,-O1 -o openssl main.o ~/dev/SharedLibraries/openssl/lib_release/libcrypto.a ~/dev/SharedLibraries/openssl/lib_release/libssl.a -ldl -lpthread

This is a correct test

g++ -Wl,-O1 -o openssl main.o ~/dev/SharedLibraries/openssl/lib_release/libssl.a ~/dev/SharedLibraries/openssl/lib_release/libcrypto.a -ldl -lpthread

After this change, config.qtbase_network.libraries.openssl test is correclty passed:

test config.qtbase_network.libraries.openssl succeeded

OpenSSL seems to be configured correctly (but it was reported correct also before this change)

Qt Network:
  getifaddrs() ........................... yes
  IPv6 ifname ............................ yes
  libproxy ............................... no
  Linux AF_NETLINK ....................... yes
  OpenSSL ................................ yes
    Qt directly linked to OpenSSL ........ yes
  OpenSSL 1.1 ............................ yes
  DTLS ................................... yes
  OCSP-stapling .......................... yes
  SCTP ................................... no
  Use system proxies ..................... yes
  GSSAPI ................................. no