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| author |   Sergei Trofimovich <slyfox@gentoo.org> | 2020-08-23 11:19:03 +0100 |
|---|---|---|
| committer | Sergei Trofimovich <slyfox@gentoo.org> | 2020-08-23 11:19:16 +0100 |
| commit | 3e3d3f661fa3df6911db31e7496951aa23497389 (patch) | |
| tree | 813263656c675163e7a5877a3d8db1af5e7716d9 /sys-libs/glibc/glibc-2.32.ebuild | |
| parent | sys-libs/glibc: reenable stack protection on powerpc-* (diff) | |
| download | gentoo-3e3d3f661fa3df6911db31e7496951aa23497389.tar.gz gentoo-3e3d3f661fa3df6911db31e7496951aa23497389.tar.bz2 gentoo-3e3d3f661fa3df6911db31e7496951aa23497389.zip | |
sys-libs/glibc: disable multiarch on ppc32
By default glibc does not enable multiarch on
powerpc-unknown-linux-gnu targets.
Bug triggers only when CFLAGS= enables power4
or above (like, CFLAGS=-mcpu=7450).
multiarch does not work on ppc with cache-block not equal to
128 bytes and breaks memset implementations. There 'dcbz'
instruction is used for optimization to zero out cache-block
with zeros at a time. memset implementation assumes
cache-block=128.
G4 hardware and qemu-ppc both have cache-block=32.
This means memset() zero-initializes only 32 of each 128-byte
block including .sbss and .bss sections. This breaks glibc's
locks and many other things.
The change disables multiarch for pps32 in Gentoo until
glibc is fixed upstream.
Reported-by: Daniel Gurney
Bug: https://sourceware.org/PR26522
Closes:https://bugs.gentoo.org/737996
Package-Manager: Portage-3.0.4, Repoman-3.0.1
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Diffstat (limited to 'sys-libs/glibc/glibc-2.32.ebuild')
| -rw-r--r-- | sys-libs/glibc/glibc-2.32.ebuild | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys-libs/glibc/glibc-2.32.ebuild b/sys-libs/glibc/glibc-2.32.ebuild index 2a750041ae48..a53946fa5628 100644 --- a/sys-libs/glibc/glibc-2.32.ebuild +++ b/sys-libs/glibc/glibc-2.32.ebuild @@ -420,6 +420,11 @@ want__thread() { use_multiarch() { # Allow user to disable runtime arch detection in multilib. use multiarch || return 1 + # multiarch does not work on ppc with cache-block not equal to 128 bytes + # and breaks memset: + # https://sourceware.org/PR26522 + # https://bugs.gentoo.org/737996 + [[ $(tc-arch ${CTARGET}) == ppc ]] && return 1 # Make sure binutils is new enough to support indirect functions, # #336792. This funky sed supports gold and bfd linkers. local bver nver |