Why use precompiled headers (C C++)? - Stack Overflow In C C++, the #include mechanism is a textual copy of the file specified into the current file Headers include other headers (which include yet other headers), so when you do a #include, it could be adding tens of thousands of lines of C++ into each cpp file (or cxx, c, whatever), all of which need to be compiled each time
What is the difference between Create Precompiled Header ( Yc) and . . . A link to the documentation might be relevant The trivial absurd answer would be: one is used to create the precompiled header, the other to use it (i e one to have the compiler read the regular headers and generate the precompiled header, the other for the compiler not to generate the precompiled header but rather use it
c++ - GCC and Precompiled Headers - Stack Overflow Current GCC (i e 4 7) and previous versions of it works nicely with precompiled headers only when you have a single common header to your application, and when that single header (which includes in turn all the system ones, and the library specific ones, required by the application) is #include-d (as the first non-comment lexeme of your sources) by every source of your application
c++ - Using pre-compiled headers with CMake - Stack Overflow Don't even go there Precompiled headers mean that whenever one of the headers changes, you have to rebuild everything You're lucky if you have a build system that realizes this More often than never, your build will just fail until you realize that you changed something that is being precompiled, and therefore you need to do a full rebuild
How to use precompiled headers in Qt project - Stack Overflow Note: PRECOMPILED_SOURCE is essentially an undocumented build artifact for PRECOMPILED_HEADER The use of PRECOMPILED_SOURCE (with different values) is necessary if you are going to use the same PRECOMPILED_HEADER from multiple projects and they may build in parallel Otherwise, each build will rewrite the header h cpp file, and other builds
Definition of C++ precompiled Headers - Stack Overflow Microsoft Visual Studio typically has a file called "stdafx h" that is precompiled - and at least in the case of MS products, this has to be the first file that is inclduded in a project [this is so that no other header file for example changes the meaning of some macro - I expect there is a hash of the compiler command-line definitions of
c++ - Precompiled Headers in Header Files - Stack Overflow The precompiled headers option allows for compiling all of that code (ie, the globally include'd code in StdAfx h) once so that you don't have to do it all of the time Thats what StdAfx cpp is for The compiler compiles StdAfx cpp with all of the code included in StdAfx h once instead of having to do it every time you build
c++ - Precompiled headers and normal includes - Stack Overflow For gcc they explicitly state that "A precompiled header file is searched for when #include is seen in the compilation As it searches for the included file (see Search Path) the compiler looks for a precompiled header in each directory just before it looks for the include file in that directory " –
c++ - How to avoid precompiled headers - Stack Overflow @André : The 'Win32 Project' and 'Win32 Console Application' templates also give the option of disabling precompiled headers In any case, my point was that since his issue is related to precompiled headers, and precompiled headers are orthogonal with standards compliance, it's misleading to bring up standards compliance at all –
C C++ - precompiled headers - Stack Overflow For example, if you precompiled all of the C standard library headers, or even all of the std namespace, it wouldn't be a problem On large projects, you likely have the files grouped somehow, for example "encryption" and "image manipulation", and you can have a special precomp for each, if you don't want the headers mixing in