m4

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m4

A macro processor for Unix and GCOS which is more flexible than cpp. m4 copies its input to the output, expanding macros which can be either built-in or user-defined. m4 has built-in functions for including files, running Unix commands, doing integer arithmetic, manipulating text in various ways and recursing. m4 can be used either as a front-end to a compiler or as a stand-alone tool.

sendmail's configuration file (/etc/sendmail.cf) is writen in m4 macros.

There is a GNU m4 v1.1 by Francois Pinard <pinard@iro.umontreal.ca> and a public domain version by Ozan Yigit <oz@sis.yorku.ca> and Richard A. O'Keefe <ok@goanna.cs.rmit.OZ.AU> (FTP from any 386BSD, NetBSD or FreeBSD archive). A Macintosh version is here.

See also m3, m5.

["The M4 Macro Processor", Kernighan & Ritchie, Jul 1977].
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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A National Highway Authority official told this correspondent that dual carriageway of M-4's Abdul Hakeem-Khanewal had already been completed and the remaining work on its interchanges and toll plazas was in progress which will also be completed soon.
M-4's Abdul Hakeem-Khanewal section to open after Eid
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Syed Zia Alumdar also demanded that link roads connecting M-3 and M-4 with Lahore-Karachi motorway should also be undertaken on priority basis.
Business community welcomes inauguration of Gojra-Shorkot motorway section
He said that collective saving of Rs1,300 million was ensured during the completing of Gojra-Shorkot section of M-4 motorway.
Shorkot-Khanewal motorway section to be completed soon
The M-4 is considered to be the backbone for the development of the northern and southern districts of the country,he remarked.
Shorkot-Khanewal section of M-4 likely to become functional by year end
An official of the NHA told reporter on Wednesday that with its completion, out of five, four sections of the M-4 would become operational, leaving behind only Shorkot-Khanewal section likely to become operational in August or September this year.
NHA plans Gojra-Shorkot inauguration next month
The Gojra-Shorkot section of M-4 is likely to be completed in October this year .
Shorkot-Khanewal section of M-4 to become functional by December
On completion,the 293-km M-4 project will cut down travel time between Pindi Bhattian and Multan to about two and a half hours.
Shorkot-Khanewal section of M-4 to become functional by August next year
ISLAMABAD -- Sixty-two kilometre under-construction Gojra-Shorkot section of Pindi Bhattian-Multan Motorway (M-4) is nearing completion and National Highway Authority is likely to open it for traffic by October this year.
Gojra-Shorkot Motorway likely to become operational by October
FAISALABAD -- Faisalabad Chamber of Commerce and Industry (FCCI) has welcomed the inauguration of Gojra-Shorkot section construction of M-4 (Faisalabad-Multan) Motorway.
FCCI welcome M-4 Gojra-Shorkot section project
Arbab Alamgir Khan has directed to accelerate the land acquisition process to ensure timely completion of Faisalabad-Multan Motorway (M-4) and any delay in this regard will not be tolerated.
Land acquisition for M4 to complete in time: Arbab
Motorway (M-4) is going on smoothly and as per schedule,the project would be completed in March next year.
Gojra-Shorkot Section of Pindi Bhattian-Multan Motorway to become operational by March 2018

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