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This is an implementation of POSIX make.

It should build on most modernish Unix-style systems:

• It comes with its own makefile, naturally, but if you don't have a make binary already the command cc -o make *.c should get you started.

• Command line options may not work properly due to differences in how getopt(3) is reset. Adjust GETOPT_RESET() in make.h for your platform, if necessary.

Microsoft Windows users will find pdpmake included in the BusyBox for Windows binaries. Download an appropriate binary for your system and rename it make.exe or pdpmake.exe. BusyBox for Windows includes a Unix shell and many utilities. These can be used in Makefiles without any further setup.

The default configuration enables extensions: some from a future POSIX standard and some that are non-POSIX. Generally these extensions are compatible with GNU make:

• double-colon rules
• -include to ignore missing include files
• include files are created if required
• ifdef/ifndef/ifeq/ifneq/else/endif conditionals
• lib.a(mem1.o mem2.o...) syntax for archive members
• :=/::=/:::=/+=/?=/!= macro assignments
• macro expansions can be nested
• chained inference rules
• */?/[] wildcards for filenames in target rules
• $(SRC:%.c=%.o) pattern macro expansions
• special handling of MAKE macro
• $^ and $+ internal macros
• the $< and $* internal macros are valid for target rules
• skip duplicate entries in $?
• .PHONY special target
• -C directory and -j maxjobs command line options
• # doesn't start a comment in macro expansions or build commands
• # may be escaped with a backslash
• macro definitions and targets can be mixed on the command line
• the CURDIR macro is set to the current directory on start up

When extensions are enabled adding the .POSIX target to your makefile will disable them. Other versions of make tend to allow extensions even in POSIX mode.

Setting the environment variable PDPMAKE_POSIXLY_CORRECT (its value doesn't matter) or giving the --posix option as the first on the command line also turn off extensions.