autoreconf looks for ACLOCAL_*FLAGS in Makefile.am and will
pass that on when it invokes aclocal. Furthermore, setting
a local like this doesn't make it available to subcommands,
so the line has no effect.

Mostly so that people looking at or cloning it later don't get confused
into thinking that they are.

Signed-off-by: Ralph Giles <giles@mozilla.com>

AC_INIT requires that the version string passed in be 'static'
so we can't use the output of a shell invocation. However, it
can be computed by an m4 shell invocation. This is what autoconf
itself does to embed its git version number in PACKAGE_VERSION.

Doing this necessitates the 'echo -n' in git-version.sh. Make
is smart enough to strip the trailing newline, but AC_INIT is
not. We must also add -f to autoreconf. Otherwise, autogen.sh
will only update configure when configure.ac changes, even if
the output of git-version.sh has changed.

This is still not ideal, since it runs at autogen.sh time, not
at 'make' time, which is what we want. This seems to be a limitation
of an upcoming automake release, which removes the old style
with PACKAGE and VERSION set by shell variables.

Diego Elio Pettenò authored 12 years ago and Timothy B. Terriberry committed 12 years ago

Includes
- A make debug target that disables optimizations and enables
   assertions,
- Proper ./configure switches for the optional features,
- A configuration summary,
- libtool versioning information,
- Visibility and warning flags,
- API documentation, and
- Support for out-of-tree builds.

Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>