X-Git-Url: https://ginac.de/ginac.git/static/gitweb.css/ginac.git?a=blobdiff_plain;f=INSTALL;h=656fd7ef89d1ba62bef154f3ce15f734d432986d;hb=a5083046b0f69afb57bec50a8658f6464bb7ee8a;hp=5e300b5e0252fc67a3e59efdc6414e7fa32deccb;hpb=7d5599da087670e2ce1229789a847acd73fe8e0a;p=ginac.git

diff --git a/INSTALL b/INSTALL
index 5e300b5e..656fd7ef 100644
--- a/INSTALL
+++ b/INSTALL
@@ -3,8 +3,9 @@ Prerequisites
 
 GiNaC requires the CLN library by Bruno Haible, available at
 <ftp://ftp.santafe.eu/pub/gnu/> or <ftp://ftp.ilog.fr/pub/Users/haible/gnu/>.
-You will also need a C++ compiler adhering to the ANSI standard (we used gcc
-for development so if you have a different compiler you are on your own).
+You will also need a good C++ compiler adhering to the ANSI standard (we 
+used gcc for development so if you have a different compiler you are on 
+your own).
 
 
 Installation
@@ -19,10 +20,7 @@ As with any autoconfiguring GNU software, installation is as easy as this:
  $ make install
 
 Known to work with:
-  - Linux/x86, EGCS-1.1.2 or GCC 2-95.
-
-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.
+  - 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:
@@ -40,11 +38,25 @@ A few of the more important ones:
 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 V1.0.2, 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 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.