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Questions tagged [pch]

Precompile Prefix Header

In iOS development with Xcode, PCH stands for Precompile Prefix Header, to make compiling faster and avoid repeating using same header file over and over again.

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How to fill a single 'pch' point on the plot with two-colours?

If you take the code below, how can you change the filling of the third diamond, so it will be half-black, half-white? The solution should apply with any colors. data <- c(1,2,3) plot(data, pch=c(23,18,23), cex=c(2.5,3,2.5))
Geek On Acid
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clang(libclang) performance of parse/reparse Translation Unit

I have a question about parsing performance, when using clang(libclang) and particulary function clang_parseTranslationUnit and clang_reparseTranslationUnit. I'm trying to optimize the process, but I'm really out of ideas already. The situation is…
majkl
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How can I prevent Xcode 4.2 from filling my boot drive with preamble.pch files?

There's an issue in Xcode 4.2, where Xcode will fill my boot drive with tens of GB of preamble.pch-****** files, someplace within /private/var/folders/. Does anybody know how to prevent this from happening? This means I have to manually empty these…
justin
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How to use .pch with clang?

I'm having header file header.h: #define TEST_VALUE 1 #define TEST_STRING "hello world" and source file source.cpp: #include "header.h" #include "stdio.h" int main() { printf(TEST_STRING"\n"); } I've followed clang pch article and…
4ntoine
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can i use multiple PCH files in 1 project?

I want to use the PCH file to speed up the build, so i store the PCH file in a separate folder and reuse it when build the project later. but I have some #import *.dll in my stdafx.h. so if something changed in the *.dll, the PCH file need be…
fresky
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Does #import on pch slow down the compile time?

I was reading this post about imports and I had one question. Does the #import that comes in the prefix.pch file by default slow down the compile time? Should I remove it and import only when necessary? #ifdef __OBJC__ #import …
Raphael Oliveira
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.pch file usage

What is the importance of .pch file and what is the significance of"#ifdef OBJC"? Also, where do we define parameters like "#ifdef IS_PRODUCTION" which are checked in .pch file.
Abhinav
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Assigning shapes to variables in a correlation circle plot

I would like to know if it is possible to set different shapes to the column names in the plot instead of the labels. I have shown a reproducible example to obtain the plot. #dataset mtcars #split the data into different…
Paul
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error: unable to spawn process (Argument list too long)

I am following this tutorial to embed Unity project in iOS project. I got the error in the Precompile Prefix.pch process error: unable to spawn process (Argument list too long) My Prefix.pch contains #include "Preprocessor.h" #ifdef __OBJC__ …
Vanessa Leung
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How do I compile PCH with a different module cache path on Xcode

The initial error from Xcode was this before I changed the home folder's name: :0: error: invalid virtual filesystem overlay file…
Mary Grace Ona
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IntelliSense PCH Warning not going away

I have a ATL C++ project and I don't have any includes in one of my C++ source files. When I try to compile, I am receiving a PCH warning: Error (active) E2940 PCH warning: an unknown error occurred. An IntelliSense PCH file was not…
GTAVLover
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Copy constructor conflicts with const member function in pch? A gcc bug?

I'm new to gcc, and I'm encountering a really strange problem while compiling precompiled header in gcc-4.7.2/4.7.3. The codes below: FooClass.h #include #include #include #include #include…
Lendy Zhang
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#define XYZ before #include precompiled header

I am refactoring some existing software and I regularly see this #define XYZ #include "stdafx.h" where stdafx is the precompiled header file. Q1. Can a knowledgeable person please confirm the following? That (except perhaps for the file…
Ivan
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Xcode .pch error while compiling. clang file not found

I have a very annoying problem. I backed up my code on Dropbox but now i get this error while compiling clang: error: no such file or directory: '../firstFoo-Prefix.pch' Since the only .pch file in my project in Xcode and my project folder is…
halfblood17
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iOS swift app build fails with cyclic dependency error in Xcode 14+

I have a swift iOS app with two static libraries - lib1 and lib2 (say). Lib2 has a dependency on Lib1 (i.e it imports Lib1 to use its types). Lib1 and Lib2 are set as dependencies for the AppTarget (when built, results in the .app file). I get the…
NightFuryLxD
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