QtUPnP::CControlPoint issues illegal instruction - qt

Question

I am working on some project using phyBoard Wega with its SDK with Qt 5.8. Project also relies on QtUPnP library and when I try to create new QtUPnP::CControlPoint object, I get illegal instruction:
Library itself is linked into main project in a static fashion, here are contents of .pro file:
CONFIG += c++11
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Refer to the documentation for the
# deprecated API to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
audiocontentsmodel.cpp \
audiocontentsrecord.cpp \
audiodevicerecord.cpp \
audiodevicesmodel.cpp \
audioinputrecord.cpp \
audioinputsmanager.cpp \
audioinputsmodel.cpp \
configurationmanager.cpp \
i2cbusmanager.cpp \
main.cpp
RESOURCES += qml.qrc
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =
# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
HEADERS += \
audiocontentsmodel.h \
audiocontentsrecord.h \
audiodevicerecord.h \
audiodevicesmodel.h \
audioinputrecord.h \
audioinputsmanager.h \
audioinputsmodel.h \
coloreddebug.h \
configurationkeys.h \
configurationmanager.h \
configurationsections.h \
customtypes.h \
defaultconfiguration.h \
i2cbusmanager.h \
threadnames.h
unix:!macx: LIBS += -L$$PWD/../upnp/ -lqtupnp
INCLUDEPATH += $$PWD/../upnp
DEPENDPATH += $$PWD/../upnp
unix:!macx: PRE_TARGETDEPS += $$PWD/../upnp/libqtupnp.a
Why do I get crash when I try to use library?
ADDENDUM 1: I have also tried to include library as dynamic (.so file), same result.
ADDENDUM 2: If I recompile library and project itself for Desktop Qt (5.14, Ubuntu 19.10), the app works fine.
ADDENDUM 3: If I analyze target (final binary) file UserConsole, I get:
user#bohr:~/Projects/NoordungMkI/Software/UserConsole$ file UserConsole
UserConsole: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=82aaff1b9db2061cbba1c59a3bddd8a6d2d82d80, with debug_info, not stripped
Should be here staticly linked, because the library is staticly linked?

Answer 1

I have followed the code with gdb and the library tried to set SSL configuration via:
CHTTPServer::CHTTPServer (QHostAddress const & address, quint16 port, QObject* parent) :
QTcpServer (parent), m_done (false),
m_httpsBufferSize (4096),
m_httpsReadDataTimeout (1),
m_httpsReadDataWaitingRetry (20000)
{
bool success = listen (address, port);
if (success)
{
m_httpsRequest.setSslConfiguration (QSslConfiguration::defaultConfiguration ());
connect (this, &CHTTPServer::httpValidReadMessage, this, &CHTTPServer::sendResponse, Qt::QueuedConnection);
connect (this, &CHTTPServer::streamingReady, this, &CHTTPServer::streamBlock, Qt::QueuedConnection);
m_done = true;
}
}
and I have commented then the line with SSL configuration:
CHTTPServer::CHTTPServer (QHostAddress const & address, quint16 port, QObject* parent) :
QTcpServer (parent), m_done (false),
m_httpsBufferSize (4096),
m_httpsReadDataTimeout (1),
m_httpsReadDataWaitingRetry (20000)
{
bool success = listen (address, port);
if (success)
{
// m_httpsRequest.setSslConfiguration (QSslConfiguration::defaultConfiguration ());
connect (this, &CHTTPServer::httpValidReadMessage, this, &CHTTPServer::sendResponse, Qt::QueuedConnection);
connect (this, &CHTTPServer::streamingReady, this, &CHTTPServer::streamBlock, Qt::QueuedConnection);
m_done = true;
}
}
and the app works now. This is not the best way of resolving the problem (I think IT IS BAD ONE) and I will do refix later.