[Interest] Installation Sizes for Applications using Qt

[Ben Cottrell]

Yes, I've tried configure with these command line arguments:
   ./configure -opensource -confirm-license -platform linux-g++ -prefix
   /opt/6.1.2-linux-g++-static -static

I got lots of errors after running configure, about missing XCB
libraries, so following the Ubuntu CI script, I installed them with:
   apt install "^libxcb.*"

I installed this on Debian 11.

I managed to build a test project with cmake containing this code:
   cmake_minimum_required(VERSION 3.20)
   project(untitled)
   
   set(CMAKE_CXX_STANDARD 17)
   set(CMAKE_AUTOMOC ON)
   set(CMAKE_AUTORCC ON)
   set(CMAKE_AUTOUIC ON)
   set(CMAKE_LINKER ld.gold)
   
   set(CMAKE_PREFIX_PATH "/opt/6.1.2-linux-g++-static/lib/cmake")
   
   find_package(Qt6 COMPONENTS
           Core
           Gui
           Widgets
           REQUIRED)
   
   add_executable(untitled main.cpp)
   target_link_libraries(untitled
           Qt::Core
           Qt::Gui
           Qt::Widgets
           )

Here's the source to main.cpp:
   #include <QApplication>
   #include <QPushButton>
   
   int main(int argc, char *argv[]) {
       QApplication a(argc, argv);
       QPushButton button("Hello world!", nullptr);
       button.resize(200, 100);
       button.show();
       return QApplication::exec();
   }

Afterwards, I used strip on untitled, reducing the size to 16MB. If I
give it to people, I'll provide the object file if they want to relink
it.

On Fri, 2021-08-27 at 12:36 +0200, Joerg Bornemann wrote:
> On 8/27/21 2:32 AM, Ben Cottrell wrote:
> > So Qt makes sense for large applications, but for smaller ones,
> > it's
> > more efficient to use individual libraries per platform.
> > 
> > Until Qt is more easily configurable, I cannot justify using it's
> > libraries in small applications.
> 
> Did you try one of the suggestions?
> If so, maybe you could state why it's not easy enough for you, so we
> can 
> try to improve it.
> 
> Joerg
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