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Project Summary
GNU M4 is an implementation of the traditional Unix macro processor. It is mostly SVR4 compatible although it has some extensions (for example, handling more than 9 positional parameters to macros). GNU m4 also has built-in functions for including files, running shell commands, doing arithmetic, etc.
In a Nutshell, GNU M4...
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has a well established, mature codebase
maintained by a average size development team
with increasing Y-O-Y commits -
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took an estimated 15 years of effort (COCOMO model)
starting with its first commit in February, 2000
ending with its most recent commit 8 days ago
Quick Reference
GNU General Public License v3.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Poor security track-record
Favorable security track-record
Vulnerability Exposure Index
Many reported vulnerabilities
Few reported vulnerabilities
Did You Know...
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30 Day SummaryMay 12 2025 — Jun 11 2025
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12 Month SummaryJun 11 2024 — Jun 11 2025
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