How to add app icon in Qt?
If you do not set an icon for your qt project, the built exe has a default icon, which seems a blank window. If you run the program, the icon […]
The FORMATETC structure of print screen clipboard
On windows, when you press the print-screen key, the screenshot is saved into system clipboard in 3 formats:CF_BITMAP, CF_DIB, and CF_DIBV5. The FORMATETC structure for these formats are: {2,1,-1,0,16}, {8,1,-1,0,5}, […]
build qt with ssl support
If you does not provide any parameter when configuring qt, the qt binaries you build sometimes support ssl, sometimes do not. If your build tool chain such as Mingw includes […]
make install after building qt
After building qt from source, you may want to install the build results by running “mingw32-make install”. But wait a minute, you do not really need to install the generated […]
Difference between qmake CONFIG and qtConfig
qmake variable CONFIG contains the conditions that are evaluated to true. CONFIG += abcdefg abcdefg:xxxxx qtConfig is a qmake test function which returns true if the tested feature is an […]
qmake module dependency – $$sort_depends and $$resolve_depends
There exists dependency relationship between qt modules. Some modules can only be built after some other modules are built. This is not only because some modules use the libs/header files […]
gcc error output format
When compiling, gcc may output many error messages which are dazzling. Although you can locate the error in the source code in the end, you may never notice the details […]
qmake spec file qmake.conf
In my previous post what .prf files are automatically loaded by qmake, you have known that qmake will read a spec file qmake.conf before reading your .pro file. This spec […]
How does qmake generate include path?
If you have read my post “Where does Qt find header files“, you have known that qmake will generate some include paths in the makefile to compile your project. For […]
make update makefile
I have a big misunderstanding about make. I thought if I run “make” or “make -f Makefile”, make will check the first target in the makefile and possibly update targets […]