NetBSD

History

mrg d186a20caf add a README to describe how to port GMP build framework, and a script to parse the GMP ./configure output and generate part of a makefile. move all the mpn build stuff into the MD part of the framework, and update the amd64 port to build all the parts it should. XXX: amd64 build fails to preprocess redc_1.asm gcd_1.asm mod_1_4.asm, XXX: so we're using the generic C versions for now.		2011-06-24 03:50:23 +00:00
..
dist	don't try to declare alloca() (wrongly) on netbsd.	2011-06-23 12:07:41 +00:00
lib/libgmp	add a README to describe how to port GMP build framework, and a script	2011-06-24 03:50:23 +00:00
build-gmp-Makefile.inc.awk	add a README to describe how to port GMP build framework, and a script	2011-06-24 03:50:23 +00:00
README	add a README to describe how to port GMP build framework, and a script	2011-06-24 03:50:23 +00:00

README

$NetBSD: README,v 1.1 2011/06/24 03:50:23 mrg Exp $

GMP in NetBSD.  We need GMP for GCC >= 4.2.


Building GMP without configure - how to port GMP build to a new platform.

The GMP build doesn't map very well to normal make.  The ./configure phase
creates a bunch of symlinks and weeds out the sources lists, and there are
files with the same name in different subdirectories linked into the same
final product.  All of these issues need to be dealt with.

There are a few steps to this:

	- run ./configure, save the output

	- create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir,
	  and copy these files into it:
		config.h
		config.m4
		gmp-mparam.h
		gmp.h
		mp.h

	- parse the ./configure output and note all created symlinks
	  for mpn.  these need to be converted into a new Makefile.inc.
	  there is a script in this subdir build-gmp-Makefile.inc.awk
	  that can be used to do this.  it should just work to generate
	  the first section of Makefile.inc if fed the entire configure
	  output.

	  assembler files generally want -DOPERATION_${foo} defined for
	  each way they are compiled or pre-processed.  the pre-processor
	  used is m4 to parse, and we and create .s files from the .asm
	  files that we then we feed into $CC.

The amd64 port is a good reference to compare.  The trialdivtab.h
generation may need to be moved the into libgmp/Makefile itself.


This is still a work in progress and methods used to build may be
changed at any time.


mrg@netbsd.org
- 2001/06/22