INSTALL: Mention that m17n libraries and libotf are needed for Arabic shaping.

2 files changed, 18 insertions, 9 deletions

diff --git a/ChangeLog b/ChangeLog
index a80fa24c3c2..c1a80f2d92f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-09-28  Eli Zaretskii  <eliz@gnu.org>
+
+        * INSTALL: Mention that m17n libraries and libotf are needed for
+        Arabic shaping.
+
 2011-09-26  Paul Eggert  <eggert@cs.ucla.edu>
 
         Merge from gnulib, improving some licensing wording.
diff --git a/INSTALL b/INSTALL
index 03682d19b10..3aed5a869cc 100644
--- a/INSTALL
+++ b/INSTALL
@@ -111,15 +111,16 @@ ADDITIONAL DISTRIBUTION FILES
 
 * Complex Text Layout support libraries
 
-Emacs needs the optional libraries "m17n-db", "libm17n-flt", "libotf"
-to correctly display such complex scripts as Indic and Khmer.
-On some systems, particularly GNU/Linux, these libraries may be
-already present or available as additional packages.  Note that if
-there is a separate `dev' or `devel' package, for use at compilation
-time rather than run time, you will need that as well as the
-corresponding run time package; typically the dev package will contain
-header files and a library archive.  Otherwise, you can download and
-build libraries from sources.
+On GNU and Unix systems, Emacs needs the optional libraries "m17n-db",
+"libm17n-flt", "libotf" to correctly display such complex scripts as
+Indic and Khmer, and also for scripts that require Arabic shaping
+support (Arabic and Farsi).  On some systems, particularly GNU/Linux,
+these libraries may be already present or available as additional
+packages.  Note that if there is a separate `dev' or `devel' package,
+for use at compilation time rather than run time, you will need that
+as well as the corresponding run time package; typically the dev
+package will contain header files and a library archive.  Otherwise,
+you can download and build libraries from sources.
 
 The sources of these libraries are available by anonymous CVS from
 cvs.m17n.org.
@@ -133,6 +134,9 @@ For m17n-lib, if you have problems with making the whole package
 because you lack some other packages on which m17n-lib depends, try to
 configure it with the option "--without-gui".
 
+Note that Emacs cannot support complex scripts on a TTY, unless the
+terminal includes such a support.
+
 * intlfonts-VERSION.tar.gz
 
 The intlfonts distribution contains X11 fonts in various encodings