Modern Versions
Make has gone through a number of rewrites, including a number of from-scratch variants which used the same file format and basic algorithmic principles and also provided a number of their own non-standard enhancements. Some of them are:
- BSD Make (pmake), which is derived from Adam de Boor's work on a version of Make capable of building targets in parallel, and survives with varying degrees of modification in FreeBSD, NetBSD and OpenBSD. Most notably, it has conditionals and iterative loops which are applied at the parsing stage and may be used to conditionally and programmatically construct the makefile, including generation of targets at runtime.
- GNU Make is frequently used in conjunction with the GNU build system. Its departures from traditional Make are most noticeable in pattern-matching in dependency graphs and build targets, as well as a number of functions which may be invoked allowing functionality like listing the files in the current directory. It is also included in Apple’s Xcode development suite for the Mac OS.
- Microsoft nmake, commonly available on Windows. It is fairly basic in that it offers only a subset of the features of the two versions of Make mentioned above. Microsoft's nmake is not to be confused with nmake from AT&T Corporation and Bell Labs for Unix.
POSIX includes standardization of the basic features and operation of the Make utility, and is implemented with varying degrees of completeness in Unix-based versions of Make. In general, simple makefiles may be used between various versions of Make with reasonable success. GNU Make and BSD Make can be configured to look first for files named "GNUmakefile" and "BSDmakefile" respectively, which allows one to put makefiles which use implementation-defined behavior in separate locations.
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