m4

m4, or om4, is a portable version of the OpenBSD m4 program.

It is suitable for ensuring standard m4 compliance, for older Unix machines that do not have a free m4 or have a very old m4.

m4 requires a C compiler, a Yacc program, a Lex program, and a make program to build.

If you need a Yacc program, a dependency-free yacc is available here: https://github.com/ibara/yacc/

m4 is known to build and run on all *BSD flavors, Linux, Mac OS X, Cygwin, AIX, and Solaris. It is very likely to run on other Unix flavors; please let me know if you are using this on a Unix not listed here so that I may add it to the list.

Compiling

To build, first install lex and yacc, then run:

$ ./configure
$ make
# make install

Testing

Tested on Linux and Mac OS X using TravisCI. *BSD, Cygwin, AIX, and Solaris testing done manually. AIX 5.1L and Solaris 8 are used to help ensure backwards compatibility.

Licensing

All files are a combination of BSD and ISC licensed files.

Get a tarball

See releases tab. Latest is om4-6.6.