README
1$NetBSD$
2
3GMP in NetBSD. We need GMP for GCC >= 4.2.
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6Building GMP without configure - how to port GMP build to a new platform.
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8The GMP build doesn't map very well to normal make. The ./configure phase
9creates a bunch of symlinks and weeds out the sources lists, and there are
10files with the same name in different subdirectories linked into the same
11final product. All of these issues need to be dealt with.
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13There are a few steps to this:
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15 - run ./configure, save the output
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17 - create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir,
18 and copy these files into it:
19 config.h
20 config.m4
21 gmp-mparam.h
22 gmp.h
23 mp.h
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25 some of these files might have src/obj references. in particular
26 fix GMP_MPARAM_H_SUGGEST to start from ./mpn/... and make sure
27 we #define __GMP_CC to "gcc -std=gnu99". XXX make this automatic
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29
30 - parse the ./configure output and note all created symlinks
31 for mpn. these need to be converted into a new Makefile.inc.
32 there is a script in this subdir build-gmp-Makefile.inc.awk
33 that can be used to do this. it should just work to generate
34 the first section of Makefile.inc if fed the entire configure
35 output.
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37 assembler files generally want -DOPERATION_${foo} defined for
38 each way they are compiled or pre-processed. the pre-processor
39 used is m4 to parse, and we and create .s files from the .asm
40 files that we then we feed into $CC.
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42The amd64 port is a good reference to compare. The trialdivtab.h
43generation may need to be moved the into libgmp/Makefile itself.
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46This is still a work in progress and methods used to build may be
47changed at any time.
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50mrg@netbsd.org
51- 2011/06/22
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