$NetBSD: README,v 1.9 2021/07/12 07:59:51 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 is a mostly-working "mknative" for GMP now. If this fails, see the section below for the old instructions. - run a "./build tools libs", possibly setting MKGCC=no if the GMP port is currently not working at all. - cd to tools/gmp, and run $TOOLDIR/bin/nbmake-$arch native-gmp - if that works, commit the files it changed in the source tree. - set NEWCONFIGDIR=/writeable/src if eg /usr/src is read-only. These are the old steps, that maybe are necessary to fix the automated output: - run ./configure, save the output. you can use the makefile "Makefile.netbsd-gmp" in this directory to run this with the right options, etc. run it with nbmake-$MACHINE. - create src/external/gpl3/gmp/lib/libgmp/arch/${MACHINE_ARCH} dir, and copy these files into it: config.h config.m4 gmp-mparam.h gmp.h some of these files might have src/obj references. in particular fix GMP_MPARAM_H_SUGGEST to start from ./mpn/... and make sure we #define __GMP_CC to just "gcc", and make sure that CONFIG_TOP_SRCDIR is not defined in config.m4 the "Makefile.netbsd-gmp" has a "copy-files" target that performs these tasks. - 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. this part needs to be automated, but requires that the first part's ./configure output be stored for it. this is not done. it would be good to convert the Makefile.inc into a pair of files -- srcs.mk generated from build-gmp-Makefile.inc.awk, and the remaining static part of the Makefile.inc left with the include of srcs.mk. The amd64 port is a good reference to compare. mrg@netbsd.org - 2021/07/11 |