minimal mapboxgl application does not show map

Amir Reza Sadeghi

Hi there

I want to use mapboxgl plugin in my educational app and just for testing how it works, I have created a Qt Quick application in the QtCreator using Qt 5.15. The main qml file is as below:

import QtQuick 2.15
import QtQuick.Window 2.15
import QtLocation 5.15
import QtPositioning 5.15

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    Map {
            id: map
            anchors.fill: parent

            plugin: Plugin {
                name: "mapboxgl"

                PluginParameter {
                    name: "mapboxgl.mapping.items.insert_before"
                    value: "road-label-small"
                }

                PluginParameter {
                    name: "mapboxgl.access_token"
                    value: "pk.eyJ1IjoiYW1pci1yZXphLXNhZGVnaGkiLCJhIjoiY2xhM3J5Nm5uMHQyYzN0bXp4eWxkamdsayJ9.0s-SuB1jKl5RAuRMox88Mg"
                }

            }

        }

}

When I run this code, the application window opens but nothing appears on it. in the output terminal, below messages are printed:

Threaded rendering is not optimal in the Mapbox GL plugin.
qt.network.ssl: QSslSocket: cannot resolve EVP_PKEY_base_id
qt.network.ssl: QSslSocket: cannot resolve SSL_get_peer_certificate
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_get_peer_certificate
[ ERROR ]  "{QSGRenderThread}[Setup]: loading style failed: SSL handshake failed"
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_get_peer_certificate
[ ERROR ]  "{QSGRenderThread}[Setup]: loading style failed: SSL handshake failed"
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_get_peer_certificate
[ ERROR ]  "{QSGRenderThread}[Setup]: loading style failed: SSL handshake failed"
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_get_peer_certificate
[ ERROR ]  "{QSGRenderThread}[Setup]: loading style failed: SSL handshake failed"
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_get_peer_certificate
[ ERROR ]  "{QSGRenderThread}[Setup]: loading style failed: SSL handshake failed"

I use Ubuntu 22.04 lts and also installed openssl using:

sudo apt-get install openssl

but it did not help me.

Does anyone know how to solve this problem?
Thanks for your helps
sincerely
Amir Reza Sadeghi

berkayozkarhan

The reason is that openssl is not installed in your system. Go to https://github.com/openssl/openssl and follow download and build instructions. After installation add this line to your .pro file.

LIBS += -L{path_of_installation} -llibssl.so
LIBS += -L{path_of_installation} -llibcrypto.so

In unix and similar systems, the install path will be as follows by default

--> /usr/local

so if you are using linux and installed openssl by default settings, add this lines to your .pro file

LIBS += -L/usr/local/lib/ -llibssl.so
LIBS += -L/usr/local/lib/ -llibcrypto.so

berkayozkarhan

@berkayozkarhan Edit : you can also install OpenSSL by MaintenanceTool.

xu__d

@berkayozkarhan I installed it, but the error is still reported.

Ronel_qtmaster

You can ignore ssl errors and go ahead