build: overhaul build system auto detect stuff using a configure script

The new build instructions are:

 $ ./configure && make && sudo make install

The configure script tries to auto detect support for various libraries
and compiler options. These choices can be overwritten by explicitly
specifing --{en,dis}able-{lua,selinux,acl}. See ./configure --help for
all supported options.

The configure script generates config.mk which should allow portable
(among GNU and BSD make) Makefiles. Manually editing config.mk is
still supported.

1 files changed, 18 insertions, 16 deletions

diff --git a/README.md b/README.md
index c0bc823..367d020 100644
--- a/README.md
+++ b/README.md
@@ -41,24 +41,26 @@ In order to build vis you will need a C99 compiler as well as:
  * [libcurses](http://www.gnu.org/software/ncurses/), preferably in the
    wide-character version
  * [libtermkey](http://www.leonerd.org.uk/code/libtermkey/)
- * [lua](http://www.lua.org/) >= 5.2
- * [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg/) >= 0.12 (runtime
-   dependency required for syntax highlighting)
-
-If you want a self contained statically linked binary you can try
-to run `make standalone` which will attempt to download, compile
-and install all of the above dependencies. `make local` will do
-the same but only for libtermkey, lua and LPeg (i.e. the system
-C and curses libraries are used).
-
-To build a regular dynamically linked binary using the system
-libraries, simply run `make` (possibly after adapting `config.mk`
-to match your system).
-
-    $ $EDITOR config.mk
-    $ make
+ * [lua](http://www.lua.org/) >= 5.2 (optional)
+ * [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg/) >= 0.12
+   (optional runtime dependency required for syntax highlighting)
+
+Assuming these dependencies are met, execute:
+
+    $ ./configure && make
     $ VIS_PATH=. ./vis config.h
 
+By default the `configure` script will try to auto detect support for
+Lua. See `configure --help` for a list of supported options. You can
+also manually tweak the generated `config.mk` file.
+
+On Linux based systems `make standalone` will attempt to download,
+compile and install all of the above dependencies into a subfolder
+inorder to build a self contained statically linked binary.
+
+`make local` will do the same but only for libtermkey, Lua and LPeg
+(i.e. the system C and curses libraries are used).
+
 Editing Features
 ================