Besides compiling source files you can use make to perform any task that can be described by shell commands. Another alternative is if you already installed MinGW and added the bin folder to the Path environment variable, you can use “mingw32-make” instead of “make”. There are multiple rules-of-thumb, but I guess that setting to total amount to + 1 is the most common.
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The idea behind this is that all cores have their own thread and there is one additional managing thread that handles the targets and which is next to be built. If you set the allowed number of threads too high, it is not possible to schedule each thread on its own core. Additional scheduling (context) switches are required to let all threads execute. This additional resource usage obviously result in lower performance.
You can either set -j or even higher -j so that compilation can happen in parallel. All relative paths in the makefile will be relative to your current directory and not the directory of the makefile. I’m following the instructions of someone whose repository I cloned to my machine. I want to use the make command as part of setting up the code environment, but I’m using Windows. Connect and share knowledge within a single location that is structured and easy to search.
I know its a little late but other people with similar problem might get some help. By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy. But there is also the option of self compiling. And if you have to install make, which is used for compiling, this should be a valid option. If you’re using Windows 10, it is built into the Linux subsystem feature. Just launch a Bash prompt (press the Windows key, type bash and choose “Bash on Ubuntu on Windows”), cd to the directory you want to make, and type make.
How can I install and use “make” in Windows?
Make itself does plinko casino not compile the source files. The Makefile (input for make) contains a set of targets. Each target has a set of dependencies (on other targets) and rules how to build the target. Make reads the Makefile(s) and manages all targets, dependencies, and build rules.
If it’s from Linux, you might need to use a real Linux or WSL. If make can run parallel builds, it will launch up to 6 simultaneous compilation process (e.g. 6 calls to gcc). The -j option is only use to speed up application build, it determines how many jobs make can spawn for the build.
What is the difference between gmake and make?
In the former Makefile, a is not evaluated until it’s used elsewhere in the Makefile, while in the latter a is evaluated immediately even though it’s not used. This is an old question but this example helps me understand the difference whenever I forget. On Windows 10 or Windows 11, you can run the command winget install ezwinports.make in the command line or PowerShell to quickly install it, restart the command line or PowerShell. An outdated alternative was MinGW, but the project seems to be abandoned, so it’s better to go for one of the previous choices. Find centralized, trusted content and collaborate around the technologies you use most.
Paste the command in the Makefile directly to the command line and see what gcc says. Installation from GnuWin32 or via winget are good and easy options. This version lacks the very important option -O, which handles the output correctly when compiling multithreaded. You can use the -C flag to specify the path to your makefile. This way you can execute it from a different directory.The -f flag has a different use.
Then in your makefile you can refer to $(foo). Note that this won’t propagate to sub-makes automatically. To add or update packages, just run the setup again and select the desired package versions. In my case there was a static variable which was not initialized. I don’t know the logic behind it but worked for me.
Since a thread that does disk operations is technically almost idle from CPU point of view, add one to the total number of cores. As you say the -j flag tells make that it is allowed to spawn the provided amount of ‘threads’. Ideally each thread is executed on its own core/CPU, so your multi-core/CPU environment is used to its fullest. Can I pass variables to a GNU Makefile as command line arguments? In other words, I want to pass some arguments which will eventually become variables in the Makefile. So in order to attack the problem, the error message from gcc is required.