make: Makefile Arguments

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1 9.1 Arguments to Specify the Makefile
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1 The way to specify the name of the makefile is with the '-f' or '--file'
1 option ('--makefile' also works).  For example, '-f altmake' says to use
1 the file 'altmake' as the makefile.
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1    If you use the '-f' flag several times and follow each '-f' with an
1 argument, all the specified files are used jointly as makefiles.
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1    If you do not use the '-f' or '--file' flag, the default is to try
1 'GNUmakefile', 'makefile', and 'Makefile', in that order, and use the
11 first of these three which exists or can be made (⇒Writing
 Makefiles Makefiles.).
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