1 $NetBSD: README,v 1.4 2013/07/15 08:59:47 mrg Exp $
3 GMP in NetBSD. We need GMP for GCC >= 4.2.
6 Building GMP without configure - how to port GMP build to a new platform.
8 The GMP build doesn't map very well to normal make. The ./configure phase
9 creates a bunch of symlinks and weeds out the sources lists, and there are
10 files with the same name in different subdirectories linked into the same
11 final product. All of these issues need to be dealt with.
13 There are a few steps to this:
15 - run ./configure, save the output. you can use the makefile
16 "Makefile.netbsd-gmp" in this directory to run this with the
17 right options, etc. run it with nbmake-$MACHINE.
19 - create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir,
20 and copy these files into it:
27 some of these files might have src/obj references. in particular
28 fix GMP_MPARAM_H_SUGGEST to start from ./mpn/... and make sure
29 we #define __GMP_CC to "gcc -std=gnu99". XXX make this automatic
32 - parse the ./configure output and note all created symlinks
33 for mpn. these need to be converted into a new Makefile.inc.
34 there is a script in this subdir build-gmp-Makefile.inc.awk
35 that can be used to do this. it should just work to generate
36 the first section of Makefile.inc if fed the entire configure
39 assembler files generally want -DOPERATION_${foo} defined for
40 each way they are compiled or pre-processed. the pre-processor
41 used is m4 to parse, and we and create .s files from the .asm
42 files that we then we feed into $CC.
44 The amd64 port is a good reference to compare. The trialdivtab.h
45 generation may need to be moved the into libgmp/Makefile itself.
48 This is still a work in progress and methods used to build may be