hello-world

Hello world

Get started:

autoreconf --install
cd build
../configure
make
sudo make install
autoconf_hello_world
sudo make uninstall

Most useful things to get started:

• ./configure --prefix
• make install DESTDIR

What to gitignore on a real project

In normal projects, the files generated by the autoreconf --install command are also checked in with Git.

We .gitignore them here for minimality.

Configure

prefix

Installation prefix

../configure --prefix="$(pwd)/install"

will install all files in the install directory.

This is:

• very instructive to see what is getting built on large projects
• useful to prepare chroot environments

Makefile

DESTDIR

Modify the installation destination for a single run, without rerunning config with a different prefix:

make install DESTDIR="$(pwd)/../install2"

This will install the programs under:

$(pwd)/../install2/usr/local/

supposing that the prefix is /usr/local.

This is very useful to make test installs without modifying the system.

It may be important to not rerun config because that requires a make distclean && make, which could take hours for large projects.