<![CDATA[QT and OPENSSL compilation undefined reference]]>I have a code using openssl libraries.

#include <openssl/aes.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>

and when compiling i have an error undefined reference to PEM_read_RSAPrivateKey

in my .pro file

QT += core gui network

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = thread
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

Im running qt creator 3.5.1 and ubuntu 14.04.

I've been searching since yesterday and i cant find a solution. Hoping someone will help! Thank you! Btw, im just new to qt and still exploring things.

]]>https://forum.qt.io/topic/72493/qt-and-openssl-compilation-undefined-referenceRSS for NodeThu, 05 Nov 2026 12:13:55 GMTThu, 20 Oct 2016 00:25:44 GMT60<![CDATA[Reply to QT and OPENSSL compilation undefined reference on Thu, 20 Oct 2016 07:07:23 GMT]]>LIBS += -L/usr/lib -lssl -lcrypto

solved my problem. Thanks for the reply :D

]]>https://forum.qt.io/post/355294https://forum.qt.io/post/355294Thu, 20 Oct 2016 07:07:23 GMT<![CDATA[Reply to QT and OPENSSL compilation undefined reference on Thu, 20 Oct 2016 04:57:55 GMT]]>@janlei0524 You're not linking against the openSSL libraries.
You need something like this in your pro file:

LIBS += -L/path/to/the/lib/dir -lopenssllib
]]>https://forum.qt.io/post/355264https://forum.qt.io/post/355264Thu, 20 Oct 2016 04:57:55 GMT