$subj would like to switch ppc64le profiles to 128-bit IEEE long double ABI 23.0 seems like a good cause to finally tackle it. This will need some toolchain magic, I will open a bug and block profile-23.0 tracker. Fedora finally switched recently https://fedoraproject.org/wiki/Changes/PPC64LE_Float128_Transition I tried the switch about a year ago and ran into some trouble with projects that bundle gnulib.
comparison of cc -E -dM - < /dev/null | grep -P 'LDBL|FLT128' | sort output from both different toolchains #define __FLT128_MIN__ 3.36210314311209350626267781732175260e-4932F128 #define __FLT128_MIN_EXP__ (-16381) #define __FLT128_NORM_MAX__ 1.18973149535723176508575932662800702e+4932F128 -#define __LDBL_DECIMAL_DIG__ 33 -#define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221372e-324L -#define __LDBL_DIG__ 31 -#define __LDBL_EPSILON__ 4.94065645841246544176568792868221372e-324L +#define __LDBL_DECIMAL_DIG__ 36 +#define __LDBL_DENORM_MIN__ 6.47517511943802511092443895822764655e-4966L +#define __LDBL_DIG__ 33 +#define __LDBL_EPSILON__ 1.92592994438723585305597794258492732e-34L #define __LDBL_HAS_DENORM__ 1 #define __LDBL_HAS_INFINITY__ 1 #define __LDBL_HAS_QUIET_NAN__ 1 -#define __LDBL_IS_IEC_60559__ 0 -#define __LDBL_MANT_DIG__ 106 -#define __LDBL_MAX_10_EXP__ 308 -#define __LDBL_MAX__ 1.79769313486231580793728971405301199e+308L -#define __LDBL_MAX_EXP__ 1024 -#define __LDBL_MIN_10_EXP__ (-291) -#define __LDBL_MIN__ 2.00416836000897277799610805135016205e-292L -#define __LDBL_MIN_EXP__ (-968) -#define __LDBL_NORM_MAX__ 8.98846567431157953864652595394501288e+307L +#define __LDBL_IS_IEC_60559__ 2 +#define __LDBL_MANT_DIG__ 113 +#define __LDBL_MAX_10_EXP__ 4932 +#define __LDBL_MAX__ 1.18973149535723176508575932662800702e+4932L +#define __LDBL_MAX_EXP__ 16384 +#define __LDBL_MIN_10_EXP__ (-4931) +#define __LDBL_MIN__ 3.36210314311209350626267781732175260e-4932L +#define __LDBL_MIN_EXP__ (-16381) +#define __LDBL_NORM_MAX__ 1.18973149535723176508575932662800702e+4932L
so I did emerge @system on stable-toolchain-unstable-rest(gcc11 glibc2.36 binutils2.38) system and everything looks good, certainly ok to be an exp profile soon-ish as soon as we have 23.0 feature. on gcc/glibc system clang uses whatever comes from stdc++/glibc as is. idk bout gcc-less system ( we don't have one for ppc64le ) and how clang/libcxx decides default float abi.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f455b0a971d5e43fb787b9e8bc7565fce3f8ff71 commit f455b0a971d5e43fb787b9e8bc7565fce3f8ff71 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-01 20:08:18 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-04 22:21:06 +0000 profiles/arch/base: mask gcc[ieee-long-double] We will unmask it on relevant ppc64le profiles once ready. Bug: https://bugs.gentoo.org/882815 Closes: https://github.com/gentoo/gentoo/pull/28419 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> profiles/arch/base/package.use.mask | 4 ++++ 1 file changed, 4 insertions(+) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=bc0ab18a5714c4867f7cd42631b44f541d9f4aa1 commit bc0ab18a5714c4867f7cd42631b44f541d9f4aa1 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-11-30 18:23:39 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-04 22:20:45 +0000 eclass/toolchain.eclass: add USE=ieee-long-double for sys-devel/gcc Bug: https://bugs.gentoo.org/882815 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> eclass/toolchain.eclass | 8 ++++++++ sys-devel/gcc/metadata.xml | 1 + 2 files changed, 9 insertions(+)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=0e7ad4c5dcfebc081ba4c7c22530dc5a88b6d1c4 commit 0e7ad4c5dcfebc081ba4c7c22530dc5a88b6d1c4 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-04 22:42:36 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-05 02:52:53 +0000 profiles: activate ppc64le ieee-long-double profile as exp Bug: https://bugs.gentoo.org/882815 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> profiles/profiles.desc | 1 + 1 file changed, 1 insertion(+) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f796db65fef1a85ba76361cd7c622245d981552d commit f796db65fef1a85ba76361cd7c622245d981552d Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-04 22:32:07 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-05 02:52:52 +0000 profiles/default/linux/ppc64le/17.0/ieee-long-double: add exp profile Bug: https://bugs.gentoo.org/882815 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> profiles/default/linux/ppc64le/17.0/ieee-long-double/eapi | 1 + .../ppc64le/17.0/ieee-long-double/package.accept_keywords | 6 ++++++ .../default/linux/ppc64le/17.0/ieee-long-double/package.mask | 6 ++++++ .../linux/ppc64le/17.0/ieee-long-double/package.use.force | 6 ++++++ .../linux/ppc64le/17.0/ieee-long-double/package.use.mask | 6 ++++++ profiles/default/linux/ppc64le/17.0/ieee-long-double/parent | 1 + .../linux/ppc64le/17.0/ieee-long-double/profile.bashrc | 11 +++++++++++ 7 files changed, 37 insertions(+)
https://gcc.gnu.org/wiki/Ieee128PowerPC#Transition on why we keep BE unchanged.
Another reason is that ieee-long-double requires vsx, which is power7 and later. So anything below and old ppc64 g5 macs are out.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=77753c90d1c507dae569c77d1ed9d076cf7a9f21 commit 77753c90d1c507dae569c77d1ed9d076cf7a9f21 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-05 21:24:38 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-20 23:46:43 +0000 profiles: mask/unmask ieee-long-double for clang-common Bug: https://bugs.gentoo.org/882815 Bug: https://bugs.gentoo.org/884395 Closes: https://github.com/gentoo/gentoo/pull/28557 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> profiles/arch/base/package.use.mask | 1 + profiles/default/linux/ppc64le/17.0/ieee-long-double/package.mask | 3 ++- profiles/default/linux/ppc64le/17.0/ieee-long-double/package.use.force | 1 + profiles/default/linux/ppc64le/17.0/ieee-long-double/package.use.mask | 3 ++- 4 files changed, 6 insertions(+), 2 deletions(-) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ef7ca111bcbd847596c782a2ea742d37b9769c4b commit ef7ca111bcbd847596c782a2ea742d37b9769c4b Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-05 21:13:18 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-20 23:46:37 +0000 sys-devel/clang-common: add USE=ieee-long-double Bug: https://bugs.gentoo.org/882815 Bug: https://bugs.gentoo.org/884395 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> sys-devel/clang-common/clang-common-15.0.5.ebuild | 15 ++++++++++++++- sys-devel/clang-common/clang-common-15.0.6.9999.ebuild | 15 ++++++++++++++- sys-devel/clang-common/clang-common-15.0.6.ebuild | 15 ++++++++++++++- sys-devel/clang-common/clang-common-16.0.0.9999.ebuild | 15 ++++++++++++++- .../clang-common/clang-common-16.0.0_pre20221210.ebuild | 15 ++++++++++++++- .../clang-common/clang-common-16.0.0_pre20221217.ebuild | 15 ++++++++++++++- sys-devel/clang-common/metadata.xml | 1 + 7 files changed, 85 insertions(+), 6 deletions(-)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ccc3749f8456e58b34630578ac0e83ec90c78ae4 commit ccc3749f8456e58b34630578ac0e83ec90c78ae4 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-23 06:30:00 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-23 07:35:05 +0000 sys-devel/clang: don't gate ieee-long-double behind USE=ppc64 in case someone does cross and wants to switch ppc64 target to use that. Bug: https://bugs.gentoo.org/882815 Closes: https://github.com/gentoo/gentoo/pull/28767 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> sys-devel/clang/clang-15.0.5.ebuild | 2 +- sys-devel/clang/clang-15.0.6.9999.ebuild | 2 +- sys-devel/clang/clang-15.0.6.ebuild | 2 +- sys-devel/clang/clang-16.0.0.9999.ebuild | 2 +- sys-devel/clang/clang-16.0.0_pre20221210.ebuild | 2 +- sys-devel/clang/clang-16.0.0_pre20221217.ebuild | 2 +- 6 files changed, 6 insertions(+), 6 deletions(-) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6f40e7badad839624fa6aa09cef3b812acbfd117 commit 6f40e7badad839624fa6aa09cef3b812acbfd117 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-22 21:44:52 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-23 07:34:58 +0000 profiles: adjust ieee-long-double masks Bug: https://bugs.gentoo.org/882815 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> profiles/arch/base/package.use.mask | 2 +- profiles/default/linux/ppc64le/17.0/ieee-long-double/package.mask | 2 +- profiles/default/linux/ppc64le/17.0/ieee-long-double/package.use.force | 2 +- profiles/default/linux/ppc64le/17.0/ieee-long-double/package.use.mask | 2 +- profiles/default/linux/ppc64le/17.0/ieee-long-double/profile.bashrc | 2 +- 5 files changed, 5 insertions(+), 5 deletions(-) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=dab01421273fa163ba4fe76e21d8be521cd9bd66 commit dab01421273fa163ba4fe76e21d8be521cd9bd66 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-22 21:40:56 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-23 07:34:53 +0000 sys-devel/clang-common: remove USE=ieee-long-double Bug: https://bugs.gentoo.org/882815 This reverts commit ef7ca111bcbd847596c782a2ea742d37b9769c4b. Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> sys-devel/clang-common/clang-common-15.0.5.ebuild | 15 +-------------- sys-devel/clang-common/clang-common-15.0.6.9999.ebuild | 15 +-------------- sys-devel/clang-common/clang-common-15.0.6.ebuild | 15 +-------------- sys-devel/clang-common/clang-common-16.0.0.9999.ebuild | 15 +-------------- .../clang-common/clang-common-16.0.0_pre20221210.ebuild | 15 +-------------- .../clang-common/clang-common-16.0.0_pre20221217.ebuild | 15 +-------------- sys-devel/clang-common/metadata.xml | 1 - 7 files changed, 6 insertions(+), 85 deletions(-) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=daab33b031374ffb8524e5d61ad754bae258aee9 commit daab33b031374ffb8524e5d61ad754bae258aee9 Author: Georgy Yakovlev <gyakovlev@gentoo.org> AuthorDate: 2022-12-22 21:40:06 +0000 Commit: Georgy Yakovlev <gyakovlev@gentoo.org> CommitDate: 2022-12-23 07:33:49 +0000 sys-devel/clang: add USE=ieee-long-double for ppc64le Forcing it via clang-common was wrong as -mabi=ieeelongdouble switch confused several build systems, including firefox and some rust apps. Instead, we switch it on compiler level, like gcc and like fedora does (who already migrated to ieee long double) For example, libcxx doesn't support -mabi=ibmlongdouble if the default is -mabi=ieeelongdouble and vice versa. So if clang is configured with ibmlongdouble default, passing ieeelongdouble will simply print a warning and ignore the switch in some cases. https://src.fedoraproject.org/rpms/clang/c/54612cbb684f201ff16961595332405cb5ab50d0?branch=rawhide https://bugzilla.redhat.com/show_bug.cgi?id=2136099 https://reviews.llvm.org/D136258 Bug: https://bugs.gentoo.org/882815 Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org> sys-devel/clang/clang-15.0.5.ebuild | 9 ++++++++- sys-devel/clang/clang-15.0.6.9999.ebuild | 9 ++++++++- sys-devel/clang/clang-15.0.6.ebuild | 9 ++++++++- sys-devel/clang/clang-16.0.0.9999.ebuild | 9 ++++++++- sys-devel/clang/clang-16.0.0_pre20221210.ebuild | 9 ++++++++- sys-devel/clang/clang-16.0.0_pre20221217.ebuild | 9 ++++++++- sys-devel/clang/metadata.xml | 1 + 7 files changed, 49 insertions(+), 6 deletions(-)
Is there any ETA for this? Google dropped support for ppc64le out of their SSL libraries and I suspect this is preventing Chromium >= 115 to compile. How can I enable it so I can try if it helps?
(In reply to darkbasic from comment #9) > Is there any ETA for this? Google dropped support for ppc64le out of their > SSL libraries and I suspect this is preventing Chromium >= 115 to compile. > How can I enable it so I can try if it helps? No, gyakovlev is away and nobody else is working on it right now. You can switch profiles if you want to try it but if they dropped support entirely for ppc64le from boringssl, I don't see this helping. I suggest filing a bug with the details so we can at least look at it - probably one with the raptor people too and see what they say if they don't know already.
It might help because raptor is still maintaining boringssl ppc64le support in their patchset. They only test it in Debian (which AFAIK uses ieee-long-double) and they suspect the issue might relate to something in the compiler around 128 bit types. I guess a proper bug report is due at this point.
This is fixed in the 23.0 profiles (available and stable now). Closing.
