macOS
Homebrewverified · 100%
brew install libcmphlocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install cmphMacPorts ports tree · textproc/cmph/Portfile · source: api.github.com
brew / rank 14623
Install libcmph with Homebrew, apk, MacPorts, Nix, apt
C minimal perfect hashing library. Version 2.0.2 via Homebrew; verified from local package data. Also installable with apk: sudo apk add libcmph.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add libcmphAlpine Linux edge package indexes · libcmph · source: dl-cdn.alpinelinux.org
Nixverified · 92%
nix profile install nixpkgs#cmphnixpkgs package indexes · pkgs/by-name/cm/cmph/package.nix · source: api.github.com
Debian aptverified · 92%
sudo apt install libcmph-devDebian stable package indexes · libcmph-dev · source: deb.debian.org
overview
Package summary
C minimal perfect hashing library
Project links
Commands and aliases
- cmph
history
Project history and usage
CMPH is a C library and command-line tool for building minimal perfect hash functions. It targets static key sets where compact storage and collision-free lookup matter more than insertion or deletion.
Project history
The CMPH site frames the project around a gap in free software support for minimal perfect hashing, distinguishing it from GNU gperf by emphasizing very large key sets rather than small generated perfect-hash functions. Its documentation collects several algorithms, including CHD, BDZ, BMZ, BRZ, CHM, and FCH.
By the 1.x and 2.x news entries, CMPH had grown beyond a single algorithm implementation into a practical library with packed-function support, memory-mappable output, an external-memory BRZ path for very large sets, and an experimental C++ interface for map-like use cases.
Adoption history
CMPH has remained a niche but durable package because minimal perfect hashes are a specialized data-structure tool. It appears in Homebrew, Debian and Ubuntu development packages, MacPorts, Nix, Alpine, and other package collections for developers who need static dictionary or key-index construction.
How it is used
Typical usage is offline construction of a hash function from a fixed key set, followed by storage or embedding of the generated function. The official examples show the C API creating a minimal perfect hash from an in-memory vector and dumping it to a file.
Why package nerds care
CMPH is the kind of package that matters disproportionately to systems and search developers: it packages academic minimal-perfect-hashing algorithms into a reusable C interface and a small CLI. Its appeal is that it turns a static corpus into dense one-probe lookup tables without hauling in a database.
Timeline
- 0.9: CHD and CHD_PH support highlighted for compact internal-memory minimal perfect hashes.
- 1.0: Bugfix-only release before a planned revamp of code and algorithms.
- 1.1: CHD_PC bug fix and test reorganization.
- 2.0: Warning cleanup and experimental C++ mph_map and mph_index interface.
Related projects
- Related projects and concepts include GNU gperf, static hash tables, CHD, BDZ, BMZ, BRZ, CHM, and FCH minimal-perfect-hashing algorithms.
Sources
security posture
Risk level: green
library-like package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- library-like package without higher-risk signals
Signals
- metadata:library-like
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
cmph | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version2.0.2
manager updated
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:libcmph |
|---|---|
| Version | 2.0.2 |
| Package manager | Homebrew |
| Homepage | https://cmph.sourceforge.net/ |
| Bottle | not recorded |
| Service | none declared |
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
apk95%
libcmph 2.0.2-r6
A minimal perfect hash C library
sudo apk add libcmph- License: LGPL-2.0-or-later AND MPL-1.1
- Architecture: x86_64
- Source Package: cmph
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Libcmph
MacPorts94%
cmph
sudo port install cmph- installed executable or alias match
- Matched by: Cmph
Debian apt92%
libcmph-dev 2.0.2-3.1
C Minimal Perfect Hashing Library development files
sudo apt install libcmph-dev- Section: libdevel
- Architecture: amd64
- Source Package: cmph
- 1 dependencies
- installed executable or alias match
- Matched by: Cmph
Debian apt92%
libcmph-tools 2.0.2-3.1
C Minimal Perfect Hashing Library command line utilities
sudo apt install libcmph-tools- Section: utils
- Architecture: amd64
- Source Package: cmph
- 2 dependencies
- installed executable or alias match
- Matched by: Cmph
Debian apt92%
libcmph0t64 2.0.2-3.1
C Minimal Perfect Hashing Library
sudo apt install libcmph0t64- Section: libs
- Architecture: amd64
- Source Package: cmph
- 1 dependencies
- 1 provides
- installed executable or alias match
- Matched by: Cmph
Nix92%
cmph
nix profile install nixpkgs#cmph- installed executable or alias match
- Matched by: Cmph
Ubuntu apt92%
libcmph-dev 2.0.2-3.1build1
C Minimal Perfect Hashing Library development files
sudo apt install libcmph-dev- Section: universe/interpreters
- Architecture: amd64
- Source Package: cmph
- 1 dependencies
- installed executable or alias match
- Matched by: Cmph
Ubuntu apt92%
libcmph-tools 2.0.2-3.1build1
C Minimal Perfect Hashing Library command line utilities
sudo apt install libcmph-tools- Section: universe/utils
- Architecture: amd64
- Source Package: cmph
- 2 dependencies
- installed executable or alias match
- Matched by: Cmph
Ubuntu apt92%
libcmph0t64 2.0.2-3.1build1
C Minimal Perfect Hashing Library
sudo apt install libcmph0t64- Section: universe/libs
- Architecture: amd64
- Source Package: cmph
- 1 dependencies
- 1 provides
- installed executable or alias match
- Matched by: Cmph
apk92%
cmph 2.0.2-r6
A minimal hash C library - utility application
sudo apk add cmph- License: LGPL-2.0-or-later AND MPL-1.1
- Architecture: x86_64
- Source Package: cmph
- 1 dependencies
- 1 provides
- installed executable or alias match
- Matched by: Cmph
apk92%
cmph-dev 2.0.2-r6
A minimal hash C library - utility application (development files)
sudo apk add cmph-dev- License: LGPL-2.0-or-later AND MPL-1.1
- Architecture: x86_64
- Source Package: cmph
- 1 dependencies
- 1 provides
- installed executable or alias match
- Matched by: Cmph
apk92%
cmph-doc 2.0.2-r6
A minimal hash C library - utility application (documentation)
sudo apk add cmph-doc- License: LGPL-2.0-or-later AND MPL-1.1
- Architecture: x86_64
- Source Package: cmph
- installed executable or alias match
- Matched by: Cmph
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- pkg.so package database
- pkgdb category and tag curation