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Diffstat (limited to 'tqtinterface/qt4/qmake/book/qmake-pch.leaf')
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diff --git a/tqtinterface/qt4/qmake/book/qmake-pch.leaf b/tqtinterface/qt4/qmake/book/qmake-pch.leaf deleted file mode 100644 index 60ea1f4..0000000 --- a/tqtinterface/qt4/qmake/book/qmake-pch.leaf +++ /dev/null @@ -1,136 +0,0 @@ -\chapter Using Precompiled Headers - -\target About -\section1 About Precompiled Headers -\index About Precompiled Headers -\index Using Precompiled Headers -\index Precompiled Headers -\index PCH - -Precompiled headers are a performance feature supported by some -compilers to compile a stable body of code, and store the compiled -state of the code in a binary file. During subsequent compilations, -the compiler will load the stored state, and continue compiling the -specified file. Each subsequent compilation is faster because the -stable code does not need to be recompiled. - -\e qmake supports the use of precompiled headers (PCH) on some -platforms and build environments, including: -\list -\i Windows - \list - \i nmake - \i Dsp projects (VC 6.0) - \i Vcproj projects (VC 7.0 \& 7.1) - \endlist -\i Mac OS X - \list - \i Makefile - \i Xcode - \i GCC 3.3 and up - \endlist -\i Unix - \list - \i GCC 3.4 and up - \endlist -\endlist - - -\target ADD_PCH -\section1 Adding PCH to your project - - -\target PCH_CONTENTS -\section2 Contents of the precompiled header file - -The precompiled header must contain code which is \e stable -and \e static throughout your project. A typical PCH might look -like this: -\section3 stable.h - -\code - /* Add C includes here */ - - #if defined __cplusplus - /* Add C++ includes here */ - #include <stdlib> - #include <iostream> - #include <vector> - #include <qapplication.h> // Qt includes - #include <qpushbutton.h> - #include <qlabel.h> - #include "thirdparty/include/libmain.h" - #include "my_stable_class.h" - ... - #endif -\endcode - -Note that a precompiled header file needs to separate C includes from -CPP includes, since the precompiled header file for C files may not -contain C++ code. - - -\target PROJECT_OPTIONS -\section2 Project options - -To make your project use PCH, the only thing you need to change in -your project settings (.pro), is to include the PRECOMPILED_HEADER option: -\code - PRECOMPILED_HEADER = stable.h -\endcode -\e qmake will handle the rest, to ensure the creation and use of the -precompiled header file. You do not need to include the precompiled -header file in HEADERS, as qmake will do this if the configuration -supports PCH. - -All platforms that support precompiled headers have the configuration -option \Bold precompile_header set. Using this option, you may trigger -conditional blocks in your .pro file, to add settings when using PCH. -For example: -\code - precompile_header:!isEmpty(PRECOMPILED_HEADER) { - DEFINES += USING_PCH - } - -\endcode - -\target EXAMPLE_PROJECT -\section1 Example project - -You can find the following source code in the -\e{qt/qmake/examples/precompile} directory: - -\Bold mydialog.ui -\quotefile precompile/mydialog.ui -\skipto <! -\printuntil </UI> - -\Bold stable.h -\quotefile precompile/stable.h -\skipto /* -\printuntil #endif - -\Bold myobject.h -\quotefile precompile/myobject.h -\skipto #include -\printuntil } - -\Bold myobject.cpp -\quotefile precompile/myobject.cpp -\skipto #include -\printuntil } - -\Bold util.cpp -\quotefile precompile/util.cpp -\skipto void -\printuntil } - -\Bold main.cpp -\quotefile precompile/main.cpp -\skipto #include -\printuntil } - -\Bold precompile.pro -\quotefile precompile/precompile.pro -\skipto # -\printuntil .ui |