docs: Write about the association between GNU/Linux and Autotools exp…

…licitly Suggested by @timfayz in universal-ctags#664. Signed-off-by: Masatake YAMATO <[email protected]>
masatake · Nov 12, 2015 · caef777 · caef777
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diff --git a/README.md b/README.md
@@ -17,5 +17,6 @@ Pull-requests are welcome!
 ## How to build and install ##
 
 To build with Autotools, see `docs/autotools.rst` for more information.
+(To build on GNU/Linux, Autotools is your choice.)
 To build on Windows, see `docs/windows.rst` for more information.
 To build on OSX, see `docs/osx.rst` for more information.
diff --git a/docs/autotools.rst b/docs/autotools.rst
@@ -1,6 +1,5 @@
-Building with configure
+Building with configure (\*nix including GNU/Linux)
 ---------------------------------------------------------------------
-
 Like most Autotools-based projects, you need to do::
 
     $ autoreconf -vfi
@@ -10,3 +9,7 @@ Like most Autotools-based projects, you need to do::
 
 After installing the `ctags` executable will be in `$prefix/bin/`.
 
+If you use (binary oriented) GNU/Linux distribution, `autoreconf` may
+be part of `autoconf` package. In additional you may have to install
+`automake`, too. Though ctags doesn't use `automake` command in
+build-time, it uses `aclocal.m4` bundled as part of the package.