Qt static with OpenSSL issue

[Bernard Lowe]

@Cobra91151 I followed these steps which lead to a successful compilation. Now, however, my application crashes immediately after launch. Have you seen anything like this? Thanks

[Cobra91151]

@Bernard-Lowe

Hi! What is your compiler? Try to attach the debugger to the application and check again. By the way, check my Qt static with MySQL issue here: https://forum.qt.io/topic/94378/qt-static-with-mysql-issue/33 to get more information about Qt static compilation.

[Bernard Lowe]

@Cobra91151 Hello! Thanks for your comprehensive response. My compiler is VS 2017 (linked with OpenSSL v1.0.2l). I had a debugger attached (cdb.exe) through qtcreator which would detatch the debugger before the main entry point. I am on openssl 'l' so your post could be very relevant here so I'll explore after trying one more thing:
One major oops that I had just realized was that I left in MD instead of MT after setting -static-runtime in configure so I am trying with MT now.

[Cobra91151]

@Bernard-Lowe

Hi! Try compiling Qt with SSL /MT libs and reply. By the way, you can check if it work with Visual Studio before compiling Qt. By creating simple console project:

Code:

#include <iostream>
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
using namespace std;

int main()
{
	cout << "Hello World!" << endl;
	SSL_load_error_strings();
	ERR_load_BIO_strings();
	OpenSSL_add_all_algorithms();
        system("Pause");
        return 0;
}

Don't forget to add all the OpenSSL includes/libs to VS 2017 and change Runtime library to Multi-threaded (/MT) (as Release) in Code Generation section.

[Bernard Lowe]

@Cobra91151
Your spike solution worked perfectly, it was also quite revealing because after succeeding using https://www.npcglib.org/~stathis/blog/precompiled-openssl/ MT libs with static runtime in Visual Studio, I attempted to use the MD libs and the linker attempted to look for a ssleay32MD DLL as if it was a windows system library which was not expected behavior for me.

My build did not fare as well because I was attempting to use https://slproweb.com/products/Win32OpenSSL.html libraries. I will now try npcg lib with MT and static runtime set. Crossing my fingers.

Here was my configure command on that last failed build using slproweb libs

configure -prefix C:\Qt\5.11.2_openssl -mp -debug-and-release -opengl desktop -opensource -static -static-runtime -opensource -confirm-license -no-icu -no-sql-sqlite -no-qml-debug -nomake examples -nomake tests -skip qtactiveqt -skip qtserialport -skip qtquickcontrols -skip qtsensors -skip qtlocation -skip qtscript -platform win32-msvc -openssl-linked -I C:\OpenSSL-Win64\include -L C:\OpenSSL-Win64\lib\VC\static OPENSSL_LIBS_DEBUG="libeay32MTd.lib ssleay32MTd.lib" OPENSSL_LIBS_RELEASE="libeay32MT.lib ssleay32MT.lib"

[Bernard Lowe]

Failed on unresolved external errors akin to below:

libeay32MT.lib(rand_win.obj) : error LNK2019: unresolved external symbol __imp_CreateCompatibleBitmap referenced in function readscreen

It looks like i need to link in GDI as well according to this Stack Overflow post

[Cobra91151]

@Bernard-Lowe

You need to specify additional libs to configure. I have the batch file for Qt compilation. For example, you need:

Debug: OPENSSL_LIBS="-llibeay32MTd -lssleay32MTd -lUser32 -lAdvapi32 -lGdi32 -lCrypt32"

Release: OPENSSL_LIBS="-llibeay32MT -lssleay32MT -lUser32 -lAdvapi32 -lGdi32 -lCrypt32"

[Bernard Lowe]

@Cobra91151 Wish that I saw your note earlier. I got it to work using this configure:

configure -prefix C:\Qt\5.11.2_openssl -mp -debug-and-release -opengl desktop -opensource -static -static-runtime -opensource -confirm-license -no-icu -no-sql-sqlite -no-qml-debug -nomake examples -nomake tests -skip qtactiveqt -skip qtserialport -skip qtquickcontrols -skip qtsensors -skip qtlocation -skip qtscript -platform win32-msvc -openssl-linked -I C:\Development\openssl-1.0.2l-vs2017\include64 -L C:\Development\openssl-1.0.2l-vs2017\lib64 OPENSSL_LIBS_DEBUG="libeay32MTd.lib ssleay32MTd.lib gdi32.lib User32.lib" OPENSSL_LIBS_RELEASE="libeay32MT.lib ssleay32MT.lib gdi32.lib User32.lib"

[mcpp]

@Cobra91151 How did you apply this patch? I'm getting errors

[SGaist]

@mcpp what exact errors ? What version of OpenSSL ?

[Cobra91151]

@mcpp

Hi! Please specify what issues with OpenSSL you encountered during Qt static compilation? I will try to help you.

[Cobra91151]

This post is deleted!