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This is the README from the source distribution of GHDL.
To get the binary distribution or more information, go to http://ghdl.free.fr
Copyright:
**********
GHDL is copyright (c) 2002 - 2015 Tristan Gingold.
See the GHDL manual for more details.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Building GHDL from sources:
***************************
Required:
* the sources of @GCCVERSION@ (at least the core part).
Note: other versions of gcc sources have not been tested.
* the Ada95 GNAT compiler (GNAT GPL 2008 are known to work;
Ada compilers in most Linux distributions are more or less buggy)
* GNU/Linux for ix86 (pc systems) (porting is necessary for other systems)
Procedure:
* Check your Ada compiler. On some systems (or with some distribution), the
GNAT compiler seems broken. Try this very simple example, using file
example.adb
<<<<<<<<<<<<<<<<<<
procedure Example is
begin
null;
end Example;
<<<<<<<<<<<<<<<<<<
Compile with
$ gnatmake example
It should create an executable, 'example'.
If this doesn't work, your GNAT installation is broken. It may be a PATH
problem or something else.
* untar the gcc tarball
* untar the ghdl tarball (this sould have been done, since you are reading a
file from it).
* move or copy the vhdl directory of ghdl into the gcc subdirectory of
the gcc distribution.
You should have a @GCCVERSION@/gcc/vhdl directory.
* configure gcc with the --enable-languages=vhdl option. You may of course
add other languages. Also you'd better to disable bootstraping using
--disable-bootstrap.
Refer to the gcc installation documentation.
* compile gcc.
'make CFLAGS="-O"' is OK
* install gcc. This installs the ghdl driver too.
'make install' is OK.
There is a mailing list for any questions. You can subscribe via:
https://mail.gna.org/listinfo/ghdl-discuss/
Please report bugs on https://github.com/tgingold/ghdl/issues
If you cannot compile, please report the gcc version, GNAT version and gcc
source version.
* Note for ppc64 (and AIX ?) platform:
The object file format contains an identifier for the source language. Because
gcc doesn't know about the VHDL, gcc crashes very early. This could be fixed
with a very simple change in gcc/config/rs6000/rs6000.c,
function rs6000_output_function_epilogue (as of gcc 4.8):
else if (! strcmp (language_string, "GNU Objective-C"))
i = 14;
else
- gcc_unreachable ();
+ i = 0;
fprintf (file, "%d,", i);
/* 8 single bit fields: global linkage (not set for C extern linkage,
Tristan Gingold.
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