parallel-builds

问题 I can set number of threads for the build process using -j argument. For example, I have 4 cores +4 virtual. When I write: make -j8 the speed increases 4 times. Is it possible to set that value as default? (For example, in Linux Gentoo, in config file, it's possible to set this default value). p.s. I have Arch Linux 回答1: Your question is not about threads, but processes (jobs) executed by make. The simple, way to set this, when make is used from the console is adding: alias make="/usr/bin

问题 I can set number of threads for the build process using -j argument. For example, I have 4 cores +4 virtual. When I write: make -j8 the speed increases 4 times. Is it possible to set that value as default? (For example, in Linux Gentoo, in config file, it's possible to set this default value). p.s. I have Arch Linux 回答1: Your question is not about threads, but processes (jobs) executed by make. The simple, way to set this, when make is used from the console is adding: alias make="/usr/bin

问题 How can I get VS 2010 to run more than one C++ compile process at a time? I mean building object modules in parallel; I'm not interested in building more than one project at a time (I know about Tools > Options > Build and Run < Maximum number of parallel project builds, but that doesn't do what I want). Basically, I'm looking for Visual Studio's equivalent of "make -jN". 回答1: Tools -> Options Projects and Solutions\VC++ Project Settings Maximum concurrent C++ compilations Also, as Ross Smith

问题 How can I get VS 2010 to run more than one C++ compile process at a time? I mean building object modules in parallel; I'm not interested in building more than one project at a time (I know about Tools > Options > Build and Run < Maximum number of parallel project builds, but that doesn't do what I want). Basically, I'm looking for Visual Studio's equivalent of "make -jN". 回答1: Tools -> Options Projects and Solutions\VC++ Project Settings Maximum concurrent C++ compilations Also, as Ross Smith

问题 How can I get VS 2010 to run more than one C++ compile process at a time? I mean building object modules in parallel; I'm not interested in building more than one project at a time (I know about Tools > Options > Build and Run < Maximum number of parallel project builds, but that doesn't do what I want). Basically, I'm looking for Visual Studio's equivalent of "make -jN". 回答1: Tools -> Options Projects and Solutions\VC++ Project Settings Maximum concurrent C++ compilations Also, as Ross Smith

问题 I usually use a high level build system like cmake for building my C/C++ code. But for various reasons I am using straight GNU make . I am doing recursive build where each directory has a makefile. I recently had to change all my makefiles from using make to $(MAKE) and then parallel builds started working. The literature I've read all say "always use $(MAKE) " (O'Reilly book, 5+ solutions on stackoverflow.com from people with greater than 10-40K points). In your makefiles, why always use $

问题 Is there a way to set make to always do 8 jobs simultaneously, akin to 'make -j 8', but in a permanent way, even between restarts of the computer? Some environment variable, perhaps? I'm using Ubuntu. 回答1: You can try the $(MAKEFLAGS) variable: export MAKEFLAGS=j8 But read the caveats and suggestions here. 来源： https://stackoverflow.com/questions/17475511/set-make-to-always-do-8-jobs-simultaneously

问题 Is it somehow possible to be able to have a parallel build no matter which build tool is used? Under Unix we can add make -jN where N are the number of threads, and under Windows I added to the CXX_FLAG "/MP" which is then used in Visual Studio to parallel build...(?) How can I make my version such that CMAKE_MAKE_PROGRAM is not always extended when I run CMake? What is a general solution? I came up with this: # Add some multithreaded build support MARK_AS_ADVANCED(MULTITHREADED_BUILD) set

问题 I am using MsBuild on a 4 core machine. I am giving the following command line to build 4 projects belonging to a big VC++ solution ( having more than 4 projects ALL with no mutual dependencies ). I am using Visual Studio 2008. To speed up the build time I am trying to take advantage of the maxcpucount options but it seems not working. I was expecting that each core would build each of the 4 projects I am providing at command line. Unfortunately I measured the time of building and with or

问题 I'm trying to setup a parallel CMake-based build for my source tree, but when I issue $ cmake . $ make -j2 I get: jobserver unavailable: using -j1. Add '+' to parent make rule as a warning. Does anyone have an idea if it is possible to fix it somehow? 回答1: looks like this is not a cmake issue but make only. 回答2: In the generated Makefile, when calling into a sub-make it needs to either use $(MAKE) (not just 'make') or else precede the line with a +. That is, a rule should look like this: