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On Linux machine most probably make will by GNU and to make user’s life isier make is soft linked to gmake. By using ‘gmake’ specifically you can use GNU make extensions without worrying about them being misinterpreted by some other make implementation. If you are familiar with programming in Linux, I highly recommend msys2. The purpose of “add path” is for convenience for your later use. From GNU Make error appendix, as you see this is not a Make error but an error coming from gcc.
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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.
What’s the difference between := and = in Makefile?
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.
How can I pass a macro definition from “make” command line arguments (-D) to C source code?
Variables in make can come from the environment in which make is run. Every environment variable that make sees when it starts up is transformed into a make variable with the same name and value. However, an explicit assignment in the makefile, or with a command argument, overrides the environment. Now I need to allow the user of my makefile to be able to pass arbitrary macro definitions from the “make.exe commandline” to “source code” right away, without having to change anything in the makefile. And be sure to use $(CFLAGS) in your compile command in the Makefile. As @jørgensen mentioned, putting the variable assignment after the make command will override the CFLAGS value already defined in the Makefile.
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With that flag you can execute a makefile with a name other than makefile. Because you do want to override your Makefile’s CFLAGS, and not just the environment (which has a lower priority with regard to Makefile variables). You can also create a symbolic link from “make” to “mingw32-make”, or copying and changing the name of the file. I would not recommend the options before; they will work until you do changes on the MinGW installation. Note that you might not be able to select your environment.
Passing additional variables from command line to make
An alternative is installing make via Chocolatey (as pointed out by Vasantha play plinko Ganesh K). However, number of cores+a few is typically a good approximation. The only way to know for sure is experimentation. It may behoove you to read some of the comments before taking action. The usual “opposite” of gmake is BSD make, which will tend to be make on BSD systems, unsurprisingly. If you want to see what BSD make is like, on Debian derivatives it’s available as apt-get install pmake.