[[!meta copyright="Copyright © 2007, 2008, 2010, 2011 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] [[!tag stable_URL open_issue_binutils]] Here's what's to be done for maintaining GNU Binutils. As these tools primarily deal with low-level parts of the target architecture and the object file format (ELF ABI), which are essentially (at least meant to be) the same, there shouldn't be many differences comparing the binutils between the GNU/Hurd and GNU/Linux ports, for example. There are a few, though, as explained below. [[!toc levels=2]] # [[General information|/binutils]] # [[Sources|source_repositories/binutils]] # Configuration Last reviewed up to the [[Git mirror's 135f49b244f3af59a209b29b3c9cd7c9170c6857 (2011-10-08) sources|source_repositories/binutils]]. * Globally * a.out, COFF, PE image support and 64 bit support are not interesting. * In the testsuites, `.exp` and `.d` files very likely should not only care for `*-*-linux*`, but also `*-*-gnu*`. (If the need to be conditionalized like this at all.) * `bfd/` * `config.bfd` * `i[3-7]86-*-gnu*` Comparing to `i[3-7]86-*-linux-*`: * `i386linux_vec` -- a.out. * `i386pei_vec` -- PE. * 64 bit. * `configure.host` Souldn't need anything. x86 Linux neither. * `configure.in` Linux: * `COREFILE=trad-core.lo` with `TRAD_HEADER='"hosts/i386linux.h"'` We don't have any such core file support configured. TODO: should we? Where is this core file reading exactly used? GDB? * `i386linux_vec` -- a.out. * `i386pei_vec` -- PE. * `binutils/` * `configure.tgt` * `gas/` * `config/te-gnu.h` C.f. `te-linux.h`; search tree for `TE_LINUX` vs. `TE_GNU` usage. * `tc-i386.h` Sole `TE_LINUX` usage is for a.out. * `configure.tgt` * `ld/` * `configure.host` * `*-*-gnu*` TODO: resolve `crt0.o` vs. `crt1.o` issue. [[Testsuite failures|binutils#static]]. * `configure.tgt` * `i[3-7]86-*-gnu*` Compare to `i[3-7]86-*-linux-*`, but don't need a.out (`i386linux`) and 64 bit support. # Build Here's a log of a binutils build run; this is from our [[Git repository's 135f49b244f3af59a209b29b3c9cd7c9170c6857 (2011-10-08) sources|source_repositories/binutils]], run on kepler.SCHWINGE and coulomb.SCHWINGE. $ export LC_ALL=C $ ../master/configure --prefix="$PWD".install SHELL=/bin/dash CC=gcc-4.6 CXX=g++-4.6 2>&1 | tee log_build [...] $ make 2>&1 | tee log_build_ [...] Different hosts may default to different shells and compiler versions; thus harmonized. This takes up around 120 MiB, and needs roughly 4 min on kepler.SCHWINGE and 15 min on coulomb.SCHWINGE. ## Analysis x86 GNU/Linux' and GNU/Hurd's configurations are slightly different, thus mask out most of the differences that are due to GNU/Linux supporting more core file formats, and more emulation vectors. $ diff -wu <(ssh kepler.SCHWINGE 'cd tmp/source/binutils/ && cat hurd/master.build/log_build* | sed -e "s%\(/media/data\)\?${PWD}%[...]%g"' | sed -f open_issues/binutils/log_build-linux.sed) <(ssh coulomb.SCHWINGE 'cd tmp/binutils/ && cat hurd/master.build/log_build* | sed -e "s%\(/media/erich\)\?${PWD}%[...]%g"' | sed -f open_issues/binutils/log_build-hurd.sed) > open_issues/binutils/log_build.diff [[log_build.diff]]. # Install $ make install 2>&1 | tee log_install [...] This takes up around 70 MiB, and needs roughly 1 min on kepler.SCHWINGE and 3 min on coulomb.SCHWINGE. ## Analysis $ diff -wu <(ssh kepler.SCHWINGE 'cd tmp/source/binutils/ && cat hurd/master.build/log_install | sed -e "s%\(/media/data\)\?${PWD}%[...]%g"' | sed -f open_issues/binutils/log_install-linux.sed) <(ssh coulomb.SCHWINGE 'cd tmp/binutils/ && cat hurd/master.build/log_install | sed -e "s%\(/media/erich\)\?${PWD}%[...]%g"' | sed -f open_issues/binutils/log_install-hurd.sed) > open_issues/binutils/log_install.diff [[log_install.diff]]. * `libtool: finish`: `ldconfig` is not run for the Hurd. # Testsuite $ make -k check [...] This needs roughly 3 min on kepler.SCHWINGE and 13 min on coulomb.SCHWINGE. $ ssh kepler.SCHWINGE 'cd tmp/source/binutils/ && cat hurd/master.build/*/*.sum hurd/master.build/*/*/*.sum | sed -e "s%\(/media/data\)\?${PWD}%[...]%g"' > open_issues/binutils/sum_linux $ ssh coulomb.SCHWINGE 'cd tmp/binutils/ && cat hurd/master.build/*/*.sum hurd/master.build/*/*/*.sum | sed -e "s%\(/media/erich\)\?${PWD}%[...]%g"' > open_issues/binutils/sum_hurd Comparing the results files, [[sum_linux]] to [[sum_hurd]]: $ diff -u -F ^Running open_issues/binutils/sum_linux open_issues/binutils/sum_hurd > open_issues/binutils/sum.diff [[open_issues/binutils/sum.diff]]. ## Analysis * `FAIL: static [...]` The testsuite isn't prepared for using `crt0.o` instead of `crt1.o` depending on whether a static or dynamic executable is created. Documented in `ld/configure.host`. Perhaps we should finally rewrite this messy code in glibc? * `FAIL: ld-elf/64ksec` On the idle grubber, this one takes a few minutes wall time to complete successfully ([[I/O system weakness|performance/io_system/binutils_ld_64ksec]]), so assuming some system load variation, the testsuite's timeout may trigger. * `FAIL: ELF weak [...]` [[I|tschwinge]] suppose this is due to us having an override w.r.t. weak symbol handling in glibc, needed for our external [[/libpthread]]. TODO: document properly.