parallel-builds

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? looks like this is not a cmake issue but make only. apenwarr 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: mysubdir: $(MAKE) -C mysubdir or like this: mysubdir: +make -C mysubdir If you don't do it one of those two

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". Billy ONeal Tools -> Options Projects and Solutions\VC++ Project Settings Maximum concurrent C++ compilations Also, as Ross Smith said in the comments, you also need to turn on the "Multiprocessor compilation" option on the

I want my CMake project to be built by make -j N , whenever I call make from the terminal. I don't want to set -j option manually every time. For that, I set CMAKE_MAKE_PROGRAM variable to the specific command line. I use the ProcessorCount() function, which gives the number of procesors to perform build in parallel. When I do make , I do not see any speed up. However if I do make -j N , then it is built definitely faster. Would you please help me on this issue? (I am developing this on Linux.) Here is the snippet of the code that I use in CMakeList.txt : include(ProcessorCount) ProcessorCount

I use a desktop with eight cores to build a Java application using Ant (through a javac target). Is there a way to speed up the compilation by using more than one thread or process? I know I can run several Ant tasks in parallel, but I don't think this can be applied to a single compilation target, or does it? I don't know of any way to do tell ant itself to make effective use of multiple cores. But you can tell ant to use the Eclipse Compiler , which has support for multithreaded compilation built-in. As long as the javac you are calling doesn't use all the cores it doesn't really matter what

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(MULTITHREADED_BUILD 12 CACHE STRING "How many threads are used to build the project") if(MULTITHREADED