- Make diff() care for evaluating stuff.

[ginac.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index 750d5164c0a134a983143513b0b0fd2d407750aa..4555857e83d9bc7f4afb3f18a8febb96bd3da2d5 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -1,27 +1,83 @@
-Installation:
+Prerequisites
 =============
 
+GiNaC requires the CLN library by Bruno Haible, available at either
+one of the following FTP-sites:
+  * <ftp://ftp.santafe.edu/pub/gnu/>,
+  * <ftp://ftp.ilog.fr/pub/Users/haible/gnu/> or
+  * <ftp://ftpthep.physik.uni-mainz.de/pub/gnu/>.
+You will also need a decent ANSI-compliant C++-compiler.  We use
+`post-EGCS' GCC, i.e GCC >= 2.95 for development so if you have a
+different compiler you are on your own.  Note that you may have to use
+the same compiler you compiled CLN with because of differing
+name-mangling schemes.
+
+Optionally, GiNaC may work together with Masaharu Goto's C++
+interpreter cint (which requires that you register for commercial
+use).  You may obtain it from
+  * <ftp://root.cern.ch/root/>.
+Install it by following the instructions included in Cint's
+distribution before trying to compile GiNaC-cint.  (See section
+`Working with the Cint C++ interpreter' below.)
+
+
+Installation
+============
+
 As with any autoconfiguring GNU software, installation is as easy as this:
 
-sysprompt> ./configure
-sysprompt> make
-sysprompt> make check
-sysprompt> make install
+ $ ./configure
+ $ make
+ $ make check
+[become root if necessary]
+ $ make install
 
 Known to work with:
-  - Linux/x86, EGCS-1.1.2 or GCC 2-95.
+  - Linux/x86, EGCS-1.1.2 or GCC 2-95.1/2-95.2
+
+The "configure" script can be given a number of options to enable and
+disable various features. For a complete list, type:
+
+ $ ./configure --help
 
-The "make" step takes about 10 minutes, on a 586 DX / 133 MHz / 64 MB or
-about 2 minutes on a P-III /550 MHz / 512 MB.
+A few of the more important ones:
+
+ --prefix=PREFIX        install architecture-independent files in PREFIX
+                        [defaults to /usr/local]
+ --exec-prefix=EPREFIX  install architecture-dependent files in EPREFIX
+                        [defaults to the value given to --prefix]
+ --disable-shared       suppress the creation of a shared version of libginac
 
 More detailed installation instructions can be found in the documentation,
 in the doc/ directory.
 
+The time the "make" step takes depends heavily on optimization levels.
+Large amounts of memory (>128MB) will be required by the compiler,
+also depending on optimization.  To give you a rough idea of what you
+have to expect the following table may be helpful.  It was measured on
+a P-III/500MHz with "enough" memory:
+
+step:         | GCC optimization level:  | comment:
+              |  -O0   |  -O1   |  -O2   |
+--------------+--------+--------+--------+-------------------------------
+make          |  ~4m   |  ~6m   |  ~10m  | building shared and static lib
+make check    |  ~2m   |  ~2m   |  ~7m   | mostly due to compilation
+
+
+Problems with CLN
+=================
+
+You should use at least CLN V1.0.3, since during the development of
+GiNaC various bugs have been discovered and fixed in earlier versions.
+To protect you, the "configure" script checks for a feature that was
+added in V1.0.3 so it won't continue with earlier versions anyhow.
+Please install CLN properly on your system before continuing with
+GiNaC.
+
 
-Problems with CLN:
-==================
+Working with the Cint C++ interpreter
+=====================================
 
-You should use at least CLN V1.0.2, since all earlier ones are
-somewhat buggy.  Even V1.0.1 has a few problems and GiNaC will not
-support older versions.  Please install it properly on your system
-before continuing with GiNaC.
+You need to specify
+  --with-cint=$CINTSYSDIR
+...