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make:tldr:e9486
The command "make --file ${filename}" is used to execute the "make" utility with a specific makefile specified by the "filename" variable.
Make is a build automation tool that is typically used to compile and build software projects. It reads instructions from a makefile, which contains rules for compiling and linking source code files to generate target binaries.
In the given command, "--file" is an option that specifies the makefile to be used. The value of the "filename" variable is passed as an argument to the "--file" option. The "${filename}" syntax is typically used in shell scripting to reference the value of a variable.
So, when you execute "make --file ${filename}", the "make" utility will use the makefile specified by the "filename" variable to build the project according to the rules defined in the makefile.