Why Am I Getting the \'Cannot Find config.m4\' Error When Running phpize?

Troubleshooting "Cannot Find config.m4" Error in phpize

Encountering the "Cannot find config.m4" error while running phpize is a common issue that can hinder the installation of extensions like ffmpeg. Here's how to resolve this error and get phpize up and running.

Prerequisites:

You have already installed the necessary development packages for your PHP version, such as php-dev for Debian/Ubuntu or php-devel for RHEL/CentOS.

Solution:

Debian/Ubuntu:

For Debian 9 or Ubuntu 16.04 , install the php-dev dependency package:

<code class="shell">sudo apt install php-dev</code>

For older versions of Debian/Ubuntu:

• For PHP 5, install php5-dev:

  <code class="shell">sudo apt-get install php5-dev</code>

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• For PHP 7.x, install php7.x-dev (replace x with the PHP version):

  <code class="shell">sudo apt-get install php7.x-dev</code>

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RHEL/CentOS:

Install the php-devel package:

<code class="shell">yum install php-devel</code>

Additional Notes:

• Ensure that you run phpize from the top-level source directory of the extension you're installing.

• If you still encounter the error after installing the development packages, try the following command to locate config.m4:

  <code class="shell">find / -type f -name config.m4</code>

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Once the development packages are installed, you should be able to run phpize and proceed with the extension installation.

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