2018-06-02 00:46:18 +03:00
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$NetBSD: README,v 1.8 2018/06/01 21:46:18 mrg Exp $
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2011-06-24 07:50:23 +04:00
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GMP in NetBSD. We need GMP for GCC >= 4.2.
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Building GMP without configure - how to port GMP build to a new platform.
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The GMP build doesn't map very well to normal make. The ./configure phase
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creates a bunch of symlinks and weeds out the sources lists, and there are
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files with the same name in different subdirectories linked into the same
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final product. All of these issues need to be dealt with.
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There are a few steps to this:
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2013-07-15 12:59:47 +04:00
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- run ./configure, save the output. you can use the makefile
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"Makefile.netbsd-gmp" in this directory to run this with the
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right options, etc. run it with nbmake-$MACHINE.
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2011-06-24 07:50:23 +04:00
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- create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir,
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and copy these files into it:
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config.h
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config.m4
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gmp-mparam.h
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gmp.h
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2012-03-20 12:21:38 +04:00
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some of these files might have src/obj references. in particular
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fix GMP_MPARAM_H_SUGGEST to start from ./mpn/... and make sure
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2018-06-02 00:46:18 +03:00
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we #define __GMP_CC to just "gcc", and make sure that
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2013-12-04 15:43:52 +04:00
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CONFIG_TOP_SRCDIR is not defined in config.m4
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2018-06-02 00:46:18 +03:00
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the "Makefile.netbsd-gmp" has a "copy-files" target that performs
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these tasks.
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2012-03-20 12:21:38 +04:00
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2011-06-24 07:50:23 +04:00
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- parse the ./configure output and note all created symlinks
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for mpn. these need to be converted into a new Makefile.inc.
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there is a script in this subdir build-gmp-Makefile.inc.awk
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that can be used to do this. it should just work to generate
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the first section of Makefile.inc if fed the entire configure
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output.
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assembler files generally want -DOPERATION_${foo} defined for
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each way they are compiled or pre-processed. the pre-processor
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used is m4 to parse, and we and create .s files from the .asm
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files that we then we feed into $CC.
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2018-06-02 00:46:18 +03:00
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this part needs to be automated, but requires that the first
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part's ./configure output be stored for it. this is not done.
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2011-06-24 07:50:23 +04:00
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2018-06-02 00:46:18 +03:00
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it would be good to convert the Makefile.inc into a pair of
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files -- srcs.mk generated from build-gmp-Makefile.inc.awk, and
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the remaining static part of the Makefile.inc left with the
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include of srcs.mk.
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The amd64 port is a good reference to compare.
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2013-12-04 05:03:15 +04:00
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2011-06-24 07:50:23 +04:00
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This is still a work in progress and methods used to build may be
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changed at any time.
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mrg@netbsd.org
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2018-06-02 00:46:18 +03:00
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- 2017/08/22
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