--- rpl/README	2010/08/13 21:06:28	1.10
+++ rpl/README	2013/03/23 17:57:55	1.26
@@ -22,12 +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-4.3 or newer;
-	- g++-4.3 or newer;
-	- gfortran-4.3 or newer.
+	- gcc-4.4 or newer;
+	- g++-4.4 or newer;
+	- gfortran-4.4 or newer.
 
 	RPL/2 build process invoques automake and autoconf.
 
@@ -38,48 +39,59 @@ 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 above) on i386, amd64, ppc32, sparc32,
-		sparc64, alpha. Test distribution is Debian. Warning, you have to
-		use NPTL, not LinuxThreads due to a bug in sem_post() that is not
-		async safe.
-	- Solaris 9 and above on i386, amd64, sparc32 (only Solaris 9) and sparc64.
+	- Linux (kernel 2.6.26 and beyond). Test distribution is Debian.
+	- Solaris 8 and beyond.
 		It can be built out of the box on Solaris in a 32bits userland. For a
 		64bits executable, you have to modify some generated makefiles or
 		specify some options. See 64bits on Solaris.
-	- FreeBSD 7.x on i386. I have installed a FreeBSD 7.0, upgraded to 7.2
+	- FreeBSD 7.x. I have installed a FreeBSD 7.0, upgraded to 7.2
 		and RPL/2 ran without any trouble. RPL/2 does not run on early
 		FreeBSD 8.0 because sig_info_t struct is not filled. This bug is now
 		fixed. Someone has reported that FreeBSD 7.2 did not filled this
 		struct too...
-	- NetBSD 4.0 and above with a restriction. NetBSD's sigpending
-		is broken and it is impossible to use DETACH intrinsic. Bug report
-		has been done and this bug should be fixed in next NetBSD release.
-		Sigpending has been fixed in NetBSD 5.0 and RPL/2 runs fine.
+	- NetBSD 5.0 and beyond.
+	- 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 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
 
-  * RPL/2 should run on :
+			SET RPL_TMP_PATH=C:/tmp
 
-	- HP-UX (10.20 and above), but not tested for a long time.
-	- Linux (2.6.26 and above) on ppc64 and other hardware (arm, hppa...) or
-		with other distributions than Debian.
-	- FreeBSD 7.0 and above on other architecture than i386. Please not
-		that I cannot reproduce sig_info_t bug and I do not have more
-		information.
-	- NetBSD 4.0 and above on other architecture than sparc32 with restriction
-		due to sigpending bug.
-	- OS/2 and eComStation.
+		OR CALL RPL/2 FROM A BOURNE SHELL.
+		========================================================================
 	- Mac OS X.
 
+  * RPL/2 should run on :
+
+	- AIX
+	- HP-UX (10.20 and beyond), but not tested for a long time.
+	- NetBSD 4.0 and beyond with restriction due to sigpending bug.
+
 	Any information about RPL/2 on these last operating systems are welcome.
 
   * RPL/2 is not supported on :
 
-	- OpenBSD due to a major bug in sigaltstack syscall when a program is
-		linked with -lthread. As this bug comes from OpenBSD libraries,
-		OpenBSD port has to wait for a fixed sigaltstack. RPL/2 uses pselect()
-		that is unavailable too.
 	- OpenVMS (work in progress) on Alpha and Integrity due to some bugs in GNV.
 		RPL/2 never works on OpenVMS VAX because GNV is too old on this
 		architecture.
@@ -128,4 +140,10 @@ 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>