- tutorial now built with texinfo

[ginac.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index 5e300b5e0252fc67a3e59efdc6414e7fa32deccb..05275655cd99ffea5ce7f7094f64a08183d8dbea 100644 (file)
--- 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:
@@ -40,6 +38,18 @@ 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:         | value of $CXXFLAGS:   | 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
 =================