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    1.0.3 • Public • Published


    Node.js module to detect the C standard library (libc) implementation family and version in use on a given Linux system.

    Provides a value suitable for use with the LIBC option of prebuild, prebuild-ci and prebuild-install, therefore allowing build and provision of pre-compiled binaries for musl-based Linux e.g. Alpine as well as glibc-based.

    Currently supports libc detection of glibc and musl.


    npm install detect-libc



    const { GLIBC, MUSL, family, version, isNonGlibcLinux } = require('detect-libc');
    • GLIBC is a String containing the value "glibc" for comparison with family.
    • MUSL is a String containing the value "musl" for comparison with family.
    • family is a String representing the system libc family.
    • version is a String representing the system libc version number.
    • isNonGlibcLinux is a Boolean representing whether the system is a non-glibc Linux, e.g. Alpine.

    detect-libc command line tool

    When run on a Linux system with a non-glibc libc, the child command will be run with the LIBC environment variable set to the relevant value.

    On all other platforms will run the child command as-is.

    The command line feature requires spawnSync provided by Node v0.12+.

    detect-libc child-command

    Integrating with prebuild

        "install": "detect-libc prebuild-install || node-gyp rebuild",
        "test": "mocha && detect-libc prebuild-ci"
        "detect-libc": "^1.0.2",
        "prebuild-install": "^2.2.0"
        "prebuild": "^6.2.1",
        "prebuild-ci": "^2.2.3"


    Copyright 2017 Lovell Fuller

    Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

    Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


    npm i detect-libc

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