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aclocal command in Linux with Examples
  • Last Updated : 15 May, 2019

aclocal command in Linux is used to automatically generate aclocal.m4 files from configure.in file. automake in Linux contain a lot of autoconf macros that can be used in the different packages. These macros must be defined in the aclocal.m4. If not, then it can’t be accessed by the autoconf.
The aclocal command first scans for macro definitions in the .m4 files in its default directory (/usr/share/aclocal on some systems) and also in the file acinclude.m4 after which it scans for macros used in the configure.in file. It will generate an aclocal.m4 file that contains definitions of all the m4 macros required by autoconf.

Syntax:

aclocal [, OPTION/]... [, SRCDIR/]

Options:

  • –acdir=dir : This option is used to search macro files in directory dir instead of the default directory.
  • –help: Display the help message and then exits.

  • -I DIRECTORY: Add the directory DIR to the list of directories searched for the .m4 files.
  • –system-acdir=dir: Shows the directory holding third party system wide files.
  • –output=FILE: Cause the output to be put into specified FILE instead of aclocal.m4.
  • –diff: Runs the command diff on m4 files that might be changed.
  • –verbose: It prints the names of the files it examines.

  • –print-ac-dir: Prints the name of the directory to be searched for m4 files, then exit.
  • –force: Always updates the output file.
  • –dry-run: Pretends to update the files.
  • –version: Shows the version number and then exits.

  • -W or –warnings: Reports the warning’s falling in the category.

    The warning categories are:

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