--- rpl/README	2011/10/02 14:14:29	1.19
+++ rpl/README	2013/03/23 17:57:55	1.26
@@ -22,14 +22,13 @@ symbolic and scientific computations.
 
   * RPL/2 requires :
 	- nawk or gawk;
+	- gmake;
 	- libtool 1.5 or newer. To build RPL/2 on Mac OSX, you should have to
 	add libtool m4 path in tools/file-*/configure.ac and
 	tools/file-*/Makefile.am;
 	- gcc-4.4 or newer;
 	- g++-4.4 or newer;
-	- gfortran-4.4 or newer;
-	- bash in /bin/bash. To build RPL/CAS on NetBSD, you have to add a soft link
-	  like 'ln -s /usr/pkg/bin/bash /bin/bash'.
+	- gfortran-4.4 or newer.
 
 	RPL/2 build process invoques automake and autoconf.
 
@@ -40,6 +39,19 @@ error related to OpenSSL, you shall try
 'make'. On some system, OpenSSL configure script is unable to set compiler
 flags.
 
+  * RPL/2 cross compilation :
+
+	To cross-compile RPL/2, you have to build in a first time a native
+	RPL/2 on build host. Installation is not required. In a second time,
+	you have to configure RPL/2 for target host in another directory like :
+
+../rpl/configure --host=arm-unknown-linux-gnueabi --enable-full-static
+--with-sysroot=/home/bertrand/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot
+--without-mysql --without-postgresql --without-x
+--with-rpltools=/home/bertrand/cvs/rpl/build --with-openssl-arch=linux-generic32
+
+	Of course, you have to configure OpenSSL with --with-openssl-arch.
+
   * RPL/2 is known to run on :
 
 	- Linux (kernel 2.6.26 and beyond). Test distribution is Debian.