Makefile.am is a programmer-defined file and is used by automake to generate the Makefile.in file (the .am stands for automake). The configure script typically seen in source tarballs will use the Makefile.in to generate a Makefile. The configure script itself is generated from a programmer-defined file named either configure.ac or configure.in (deprecated). I prefer .ac … Read more
You can do this using the sysctl utility: sysctl -n hw.ncpu
That’s usually because you don’t have a file called vertex.cpp available to make. Check that: that file exists. you’re in the right directory when you make. Other than that, I’ve not much else to suggest. Perhaps you could give us a directory listing of that directory.
It is actually executing the command, changing the directory to some_directory, however, this is performed in a sub-process shell, and affects neither make nor the shell you’re working from. If you’re looking to perform more tasks within some_directory, you need to add a semi-colon and append the other commands as well. Note that you cannot … Read more
Make (or rather a Makefile) is a buildsystem – it drives the compiler and other build tools to build your code. CMake is a generator of buildsystems. It can produce Makefiles, it can produce Ninja build files, it can produce KDEvelop or Xcode projects, it can produce Visual Studio solutions. From the same starting point, … Read more
make clean removes any intermediate or output files from your source / build tree. However, it only affects the source / build tree; it does not touch the rest of the filesystem and so will not remove previously installed software. If you’re lucky, running make uninstall will work. It’s up to the library’s authors to … Read more
I don’t know a way to do what you want exactly, but a workaround might be: run: ./prog ./prog $(ARGS) Then: make ARGS=”asdf” run # or make run ARGS=”asdf”
$@ is the name of the target being generated, and $< the first prerequisite (usually a source file). You can find a list of all these special variables in the GNU Make manual. For example, consider the following declaration: all: library.cpp main.cpp In this case: $@ evaluates to all $< evaluates to library.cpp $^ evaluates … Read more
make defines a tab is required to start each recipe. All actions of every rule are identified by tabs. If you prefer to prefix your recipes with a character other than tab, you can set the .RECIPEPREFIX variable to an alternate character. To check, I use the command cat -e -t -v makefile_name. It shows … Read more
You have several options to set up variables from outside your makefile: From environment – each environment variable is transformed into a makefile variable with the same name and value. You may also want to set -e option (aka –environments-override) on, and your environment variables will override assignments made into makefile (unless these assignments themselves … Read more