--- rpl/README	2010/09/07 12:54:03	1.13
+++ rpl/README	2012/04/07 16:39:04	1.20
@@ -27,7 +27,9 @@ symbolic and scientific computations.
 	tools/file-*/Makefile.am;
 	- gcc-4.4 or newer;
 	- g++-4.4 or newer;
-	- gfortran-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'.
 
 	RPL/2 build process invoques automake and autoconf.
 
@@ -38,6 +40,19 @@ 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
+--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.
@@ -54,7 +69,18 @@ flags.
 	- OpenBSD 4.8 and beyond.
 	- Windows with Cygwin (>= 1.7.5).
 	- OS/2 and eComStation with EMX (>= 0.9d). You probably have to
-		recreate configure script and makefiles with autoreconf.
+		recreate configure script and makefiles with aclocal, autoconf and
+		automake.
+		========================================================================
+		WARNING : eCS DEFINES TMP VARIABLE THAT OVERWRITES PATHS
+		IN FOPEN() SYSTEM CALL. /TMP/xxx IS REPLACED BY /%TMP%/xxx.
+		THIS BUG ONLY OCCURS WHEN RPL/2 IS CALLED FROM OS/2 OR 4OS2 SHELL.
+		WORKAROUND : DEFINE RPL_TMP_PATH WITH A DRIVE LETTER LIKE
+
+			SET RPL_TMP_PATH=C:/tmp
+
+		OR CALL RPL/2 FROM A BOURNE SHELL.
+		========================================================================
 	- Mac OS X.
 
   * RPL/2 should run on :
@@ -115,4 +141,10 @@ rpl: ELF 64-bit MSB executable SPARCV9 V
 
 	Very easy^Wnice, isn't it ?
 
+  * OS/2 and eComstation
+
+	GSL configure script is broken. You have to replace
+	$(SHELL) $(top_buildir)/libtool by sh $(top_buildir)/libtool in each
+	Makefile. By default, makefile's try to use ash.exe that is broken.
+
 	J. Bertrand <joel.bertrand@systella.fr>