Project:Toolchain

Toolchain Project
Description	Manages gcc/binutils/glibc and other toolchain-related packages
Project email	toolchain@gentoo.org
IRC channel	#gentoo-toolchain (webchat)
Lead(s)	Matthias Maier (tamiko) Last elected: 2019-05-11
Member(s)	Anthony G. Basile (blueness) Andreas K. Hüttel (dilfridge) Joshua Kinard (kumba) Luca Barbato (lu_zero) Matt Turner (mattst88) Steve Arnold (nerdboy) David Seifert (soap) Sam James (sam) Mike Frysinger (vapier) William Hubbs (williamh) Mikle Kolyada (Zlogene) Magnus Granberg (Zorry)
Subproject(s) (and inherited member(s))	Crossdev Project
Parent Project	Gentoo
Project listing

The toolchain project manages gcc, binutils, glibc, and other toolchain-related packages.

Team meetings

• The next team meeting is (to be decided).
• Agenda: (to be written)
• Agenda topic collection page: /To be discussed

Packaging notes

sys-libs/glibc

• packaging sys-libs/glibc

sys-kernel/linux-headers

• packaging sys-kernel/linux-headers

Misc notes

Managing patches

• Managing toolchain patchsets with git

Version support policy

• Policies for support of old versions

USE=native-symlinks flags

• Hints on USE=native-symlinks

User guides for toolchain packages

This section covers various package Toolchain project maintains.

dev-util/ccache

• Tips and tricks using dev-util/ccache

Porting notes

This section describes common build breakages, example fixes and a bit of explanation. Useful to craft the patch and explain upstream why change is needed.

binutils

binutils-2.31.1

• Test failures

binutils-2.32

• /Binutils_2.32_upgrade_notes/elfutils_0.175: unable to initialize decompress status for section .debug_info

binutils-2.34

Tracker bug #707898

• /Binutils_2.34_porting_notes/undefined reference to bfd_get_section_*, example bug #707846

gcc

gcc-8

• Bug tracker gcc-8 porting bug #654766
• error: -Wabi won't warn about anything [-Werror=abi], example bug #663928

gcc-9

• Bug tracker for gcc-9 porting bug #685044
• error: expected '(' before 'volatile', example bug #679330

gcc-10

• Bug tracker for gcc-10 porting bug #706426
• -fno-common, multiple definition of 'foo': first defined here, example bug #705730

gcc-11

• Bug tracker for gcc-11 porting bug #732706

glibc

glibc-2.26

• sysmacros.h: missing major(), minor() macros
• xlocale.h not found
• glibc-2.26+ /etc/nsswitch.conf changes
• Migrating from SunRPC to libtirpc

glibc-2.27

• pow10, pow10f and pow10l removed
• ld: cannot find -lieee

glibc-2.28

Tracker: bug #663916

• fseeko, fflush are broken for bundled gnulib, example bug #663242
• linknamespace tests (>400) fail when upgrading from 2.27, example bug #669208
• error: FILE {aka struct _IO_FILE } has no member named ..., example bug #669330
• Test failures

glibc-2.30

Tracker: bug #691846

• fatal error: sys/stropts.h: No such file or directory, example bug #691762
• gettid() related issues, glibc 2.30 declares its own gettid, examples bug #691886 bug #691836
• error: RES_USE_INET6 undeclared (first use in this function), example bug #692768
• Test failures

glibc-2.31

Tracker: bug #708318

• stime() symbol removal: a.c:.text.startup+<snip>: undefined reference to stime, example bug #709642
• Test failures

glibc-2.32

Tracker: bug #736174

• fatal error: sys/sysctl.h: No such file or directory, example bug #736892
• Test failures

glibc-2.33

Tracker: bug #768369

• ...

glibc-2.34

Tracker: bug #803482

• error: expected declaration specifiers or "..." before "(" token, bug #803485, conflicting macros in outdated gnulib
• error: missing binary operator before token "(", SIGSTKSZ, bug #803554, change of SIGSTKSZ definition, outdated gnulib
• error: variably modified ‘sigsegv_stack’ at file scope, SIGSTKSZ, bug #803644, change of SIGSTKSZ definition
• error: void value not ignored as it ought to be, closefrom, bug #803557, introduction of void closefrom
• error: too few arguments to function ‘close_range’, bug #803632, introduction of close_range with 3 params
• Test failures

libffi

libffi-3.3

Tracker: bug #667508

• FFI_SYSV was not declared in this scope, example bug #667476

libffi-3.4

Tracker: bug #801109

• USE=exec-static-trampoline exposes a latent bug in
  • ghc (bug only)
  • gobject-introspection (example fix)

linux-headers

linux-headers-5.2

Tracker: bug #690296

• SIOCGSTAMP was not declared in this scope, example bug #690788

Update guides

• mpfr-4 update guide

Reporting bugs

• GCC "internal compiler error" bug reporting guide
• "stack smashing detected" debugging guide

Ongoing work / investigations

• gcc-10 and znver1 stack smash, bug #724314
• libxcrypt migration (nearly complete)
  • TODO: musl
• 64-bit time_t for 32-bit arches (early stages)