Linux From Scratch - Version 8.2-systemd

Chapter 6. Installing Basic System Software

6.43. Autoconf-2.69

The Autoconf package contains programs for producing shell scripts that can automatically configure source code.

Approximate build time: less than 0.1 SBU (about 3.2 SBU with tests)
Required disk space: 17.3 MB

6.43.1. Installation of Autoconf

Prepare Autoconf for compilation: 

./configure --prefix=/usr

Compile the package: 

make

To test the results, issue: 

make check

This takes a long time, about 3.2 SBUs. In addition, several tests are skipped that use Automake. For full test coverage, Autoconf can be re-tested after Automake has been installed. In addition, two tests fail due to changes in libtool-2.4.3 and later.

[Note]

Note

The test time for autoconf can be reduced significantly on a system with multiple cores. To do this, append TESTSUITEFLAGS=-j<N> to the line above. For instance, using -j4 can reduce the test time by over 60 percent.

Install the package: 

make install

6.43.2. Contents of Autoconf

Installed programs: autoconf, autoheader, autom4te, autoreconf, autoscan, autoupdate, and ifnames
Installed directory: /usr/share/autoconf

Short Descriptions

autoconf

Produces shell scripts that automatically configure software source code packages to adapt to many kinds of Unix-like systems; the configuration scripts it produces are independent—running them does not require the autoconf program

autoheader

A tool for creating template files of C #define statements for configure to use

autom4te

A wrapper for the M4 macro processor

autoreconf

Automatically runs autoconf, autoheader, aclocal, automake, gettextize, and libtoolize in the correct order to save time when changes are made to autoconf and automake template files

autoscan

Helps to create a configure.in file for a software package; it examines the source files in a directory tree, searching them for common portability issues, and creates a configure.scan file that serves as as a preliminary configure.in file for the package

autoupdate

Modifies a configure.in file that still calls autoconf macros by their old names to use the current macro names

ifnames

Helps when writing configure.in files for a software package; it prints the identifiers that the package uses in C preprocessor conditionals [If a package has already been set up to have some portability, this program can help determine what configure needs to check for. It can also fill in gaps in a configure.in file generated by autoscan.]