precompiled-headers

I ran into precompiled headers today for the first time..forever changing my life. I can't believe compiling my C++ code could be that fast. It makes total sense now.. Anyway, one thing that is confusing me is that from what I've read so far, pre-compiled headers only should be added to source files( cpp? ). In Visual Studio, there is an option under Project Properties->C/C++->Advanced to "Force Include File". I set that compiler option to stdafx.h . After doing this..I no longer require to include the headers I have added to my stdafx.h , even inside my header files ( source files are

What are the best candidates for a precompiled header file? Can I put STL and Boost headers there, even though they have templates? And will that reduce compile times? Also, what are the best IDE settings to reduce compile times? The quick answer: the STL and Boost headers do indeed belong in the precompiled header file, even though these header files define template classes. When generating a precompiled header file, a compiler parses the header text (a significant task!), and converts it into a binary format that is optimised for the compiler's benefit. Even though the template classes will

I have seen a few (old) posts on the 'net about hacking together some support for pre-compiled headers in CMake. They all seem a bit all-over the place and everyone has their own way of doing it. What is the best way of doing it currently? sakra There is a third party CMake module named 'Cotire' which automates the use of precompiled headers for CMake based build systems and also supports unity builds. larsmoa Im using the following macro to generate and use precompiled headers: MACRO(ADD_MSVC_PRECOMPILED_HEADER PrecompiledHeader PrecompiledSource SourcesVar) IF(MSVC) GET_FILENAME_COMPONENT

I was having troubles getting pre-compiled headers to work, so I came up with the following minimal-working-example. This is the header file foo.h #include <iostream> using namespace std; void hello() { cout << "Hello World" << endl; } I compile this as g++ -c foo.h gives me a compiled header foo.gch . I expect that when I compile the following source file that includes foo.h , it should pick the header foo.h.gch and I am good. // test.cpp #include <cstdio> // Swap ordering later #include "foo.h" // ------------------ int main() { hello(); } But surprisingly, this does not compile using foo.h

I have a header file called stdafx.h and this one is precompiled of course. I've read that I should include these files into my .cpp files, but some of these statements are already needed in the header file coming with that. Should I add the stdafx into my header or into my cpp? I thought it was good practise to put it into the header, but I seem to be obliged to put it into the header instead. Example: stdafx contains freeglut. my class header file has an attribute of GLenum. Should I include the stdafx into the .h of the class? stdafx.h should be the first include in EVERY cpp file in your

I hope you can help me, cause I have no idea about what's going on. I'm having the following error while trying to add Beecrypt library to my project: fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source? Actually I did not forget to add #include "stdafx" to my source. The compiler points the error to be at the end of this .cxx file: #define BEECRYPT_CXX_DLL_EXPORT #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "beecrypt/c++/security/SecureRandom.h" #include "beecrypt/c++/security/SecureRandomSpi.h

The Xcode project generates Prefix.pch file automatically. When I deleted this file and tried to build, I got build error saying ' * _Prefix.pch' file is missing. Is Prefix.pch file is a must for compiling with Xcode? How can I build without the Prefix.pch file? In Xcode, go to your target's build settings (Command-Option-E, build tab) and uncheck Precompile Prefix Header (GCC_PRECOMPILE_PREFIX_HEADER). You can also remove the value of the Prefix Header setting if you wish. Prefix headers are compiled and stored in a cache, and then automatically included in every file during compilation. This

When I try to build my app in Xcode , I get this error message: PCH file built from a different branch ((clang-425.0.24)) than the compiler ((clang-425.0.27)) It doesn't happen before, but this was the first build after updating Xcode. Other apps work, but not this specific one. If I turn off the "Precompile Prefix Header" setting, it works. How do I fix this error and still keep that setting on? gaige This is often a caching problem. Usually it can be resolved by holding down the Option key and choosing Product > Clean Build Folder... Sedes It seems that the Product > Clean Build Folder...