Qt Static Build Is Very Big

[Eligijus]

@Taz742 I thought you were talking about static Qt build taking up a lot of space and not about application with statically linked Qt.
In this case What Qt modules do you use? What is your app size if you link Qt dynamically?
If i recall correctly my application with just core and gui modules took about 15Mb of space.

[Taz742]

@Eligijus
I use Qt 5.7
My project is the following: I need only .exe which reads .xml file, this xml is written in the file's address that should be downloaded and put in my specified location.
I have prepared everything but I do not want to use my program to duplicate .dll and other files. I need only .exe and be too small.

[Taz742]

@Eligijus
Unfortunately 15 megabytes is very big..
Can I make the Qt application size <= 5 mb?

[VRonin]

See http://blog.qt.io/blog/2017/05/31/qt-lite-qt-5-9-lts/

[Taz742]

@VRonin
Excuse me, I can not find ho to download it :D

[VRonin]

@Taz742 Given the level of customisation provided there is no way for Qt to deliver pre-compiled binaries. It's just a series of config options to use when building Qt from sources. use configure --list-features to see them all

[Taz742]

@VRonin
Unfortunately, there are many big for me.
I started writing my project Native c ++ (Dev-Cpp 5.11 TDM-GCC 4.9.2), but I can not write http downloader.
Can anyone help me?

[VRonin]

@Taz742 said in Qt Static Build Is Very Big:

Dev-Cpp 5.11

Oh god, please no! Use a proper IDE. Qt Creator is already there for you

@Taz742 said in Qt Static Build Is Very Big:

I can not write http downloader

You can use libcurl. it's in C but it's only 300KB

P.S.
You are probably going off topic here give this is a Qt forum

[Taz742]

@VRonin said in Qt Static Build Is Very Big:

Oh god, please no!

:D:D:D:D
When I started learning programming (Algorithm) Dev was my friend and I love it very much :)

@VRonin said in Qt Static Build Is Very Big:

Use a proper IDE. Qt Creator is already there for you

Yes there is Qt but in this particular case only .exe need and very small.

@VRonin said in Qt Static Build Is Very Big:

You can use libcurl. it's in C but it's only 300KB

And where to use Libcurl, tell me the language of programming where I use Libcurl and then I will only have .exe 300KB.
Please teach me :))

[VRonin]

I love it very much

I guess it's a bit like my love of escargot.

Yes there is Qt but in this particular case only .exe need and very small.

There is no relation between what IDE you use and the complied output

And where to use Libcurl, tell me the language of programming where I use Libcurl and then I will only have .exe 300KB

Almost all C++ compilers can compile and link to C code. Just follow the tutorial

[mrjj]

Just a note

Did you try
https://upx.github.io/

Its the charactermap sample static compiled. and then compressed.

Its fully transparent for the user and very fast decompressor.

[VRonin]

@mrjj That is sort of 7zip for .exes if the problem is space on the target device that will not solve very much as the program will be decompressed before it's started.

It works really well, however, if your problem is transferring the file around

[mrjj]

@VRonin

Well it decompresses to memory so unless its a size memory issue (on target), it should not matter.

But of course it wont be as lovely small as curl + pugixml :)

[Taz742]

@mrjj said in Qt Static Build Is Very Big:

https://upx.github.io/

It's vey hard for me.

[mrjj]

@Taz742

What is very hard ?

[Taz742]

@mrjj
UPX only decompresses .exe?
UPX can not just make it from my files only .exe ?

[mrjj]

@Taz742

yes it reduce size of exe.

its not installer.

you must produce single exe then compress it.

[Taz742]

Thank @mrjj very much.
If I made my project on Qt and I would make it static build And .Exe will be a maximum of 15 megabytes, UPX will bring it down 15 -
min(15 * 50 / 100, 15 * 70 / 100), This is a lot for me.
I would be happy with only about 500 kilobytes :(.
Let's take the name of everyone skype installer. Where can it be written?
Excuse me to get my problems out of Qt. I did not want a flood this topic.

[Eeli K]

@Taz742 From the beginning of this thread it has been unclear to me what you actually want to do. For example, if you want to have a simple Windows-only application with a graphical user interface which does only one simple thing and whose size goes under 5MB, Qt isn't a good solution for you. See https://blog.qt.io/blog/2017/05/31/qt-lite-qt-5-9-lts/ for size comparison and you can see that under 5MB is so-and so with the Lite system, but under 1MB is unrealistic. The very small applications you see on Windows use some lighweight libraries or maybe only Microsoft's own Windows APIs. The reason they are small is because Windows has many libraries installed by default, not because Qt is bloated. If just under 5MB is acceptable, you can try e.g. wxWidgets, see https://wiki.wxwidgets.org/Reducing_Executable_Size. If you have a command line application without windows and widgets you shouldn't be using Qt in this case at all.

[mrjj]

@Taz742 said in Qt Static Build Is Very Big:

15 -min(15 * 50 / 100, 15 * 70 / 100), This is a lot for me.

I have no idea what this shows.
Normally upx compress it to 1/3 of size.