commit: 5136179f9356f0bcb34fa5b8c5d0d0817f316ec9
Author: Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
AuthorDate: Sat Jan 4 09:07:30 2020 +0000
Commit: Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
CommitDate: Sat Jan 4 18:45:09 2020 +0000
URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5136179f
toolchain.eclass: enable elfv2 abi on powerpc64-*-musl unconditionally
on ppc64 gcc assumes the following:
from gcc ppc64 manual:
-mabi=elfv1
Change the current ABI to use the ELFv1 ABI. This is the default ABI
for big-endian PowerPC 64-bit Linux. Overriding the default ABI
requires special system support and is likely to fail in spectacular
ways.
-mabi=elfv2
Change the current ABI to use the ELFv2 ABI. This is the default
ABI for little-endian PowerPC 64-bit Linux. Overriding the
default ABI requires special system support and is likely to
fail in spectacular ways.
Since we are taking gcc defaults, let's pass --with-abi=elfv2 on musl
targets
without it it will fail, since musl does not support elfv1 at all.
from musl INSTALL file:
* PowerPC64
* Both little and big endian variants are supported
* Compiler toolchain must provide 64-bit long double, not IBM
double-double or IEEE quad
* Compiler toolchain must use the new (ELFv2) ABI regardless of
whether it is for little or big endian
https://git.musl-libc.org/cgit/musl/tree/INSTALL
Closes: https://github.com/gentoo/gentoo/pull/14234
Closes: https://bugs.gentoo.org/704784
Revieved-by: Sergei Trofimovich <slyfox <AT> gentoo.org>
Signed-off-by: Georgy Yakovlev <gyakovlev <AT> gentoo.org>
eclass/toolchain.eclass | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass
index 6d469564fa5..ada2e4496fc 100644
--- a/eclass/toolchain.eclass
+++ b/eclass/toolchain.eclass
@@ -1207,6 +1207,14 @@ toolchain_src_configure() {
is-flagq -mfloat-gprs=double && confgcc+=( --enable-e500-double
)
[[ ${CTARGET//_/-} == *-e500v2-* ]] && confgcc+=(
--enable-e500-double )
;;
+ ppc64)
+ # On ppc64 big endian target gcc assumes elfv1 by default,
+ # and elfv2 on little endian
+ # but musl does not support elfv1 at all on any endian ppc64
+ # see https://git.musl-libc.org/cgit/musl/tree/INSTALL
+ # https://bugs.gentoo.org/704784
+ [[ ${CTARGET} == powerpc64-*-musl ]] && confgcc+=(
--with-abi=elfv2 )
+ ;;
riscv)
# Add --with-abi flags to set default ABI
confgcc+=( --with-abi=$(gcc-abi-map ${TARGET_DEFAULT_ABI}) )
