52 lines
1.7 KiB
Text
52 lines
1.7 KiB
Text
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$NetBSD: README,v 1.3 2012/03/20 08:21:38 mrg Exp $
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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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- run ./configure, save the output
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- create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir,
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and copy these files into it:
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config.h
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config.m4
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gmp-mparam.h
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gmp.h
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mp.h
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some of these files might have src/obj references. in particular
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fix GMP_MPARAM_H_SUGGEST to start from ./mpn/... and make sure
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we #define __GMP_CC to "gcc -std=gnu99". XXX make this automatic
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- parse the ./configure output and note all created symlinks
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for mpn. these need to be converted into a new Makefile.inc.
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there is a script in this subdir build-gmp-Makefile.inc.awk
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that can be used to do this. it should just work to generate
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the first section of Makefile.inc if fed the entire configure
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output.
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assembler files generally want -DOPERATION_${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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The amd64 port is a good reference to compare. The trialdivtab.h
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generation may need to be moved the into libgmp/Makefile itself.
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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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- 2011/06/22
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