gcc-11.1.0

[Xi Ruoyao]

The release branch of gcc-11 has been forked and it should be released in two or three weeks.

[Xi Ruoyao]

It's scheduled to be released on Apr 27.

The new features are documented in ​https://gcc.gnu.org/gcc-11/changes.html. The breaking changes are documented in ​https://gcc.gnu.org/gcc-11/porting_to.html.

[Xi Ruoyao]

The GCC developers are proud to announce another major GCC release, 11.1.

This release switches the default debugging format to DWARF 5 [1] on most
targets and switches the default C++ language version to -std=gnu++17.
It makes great progress in the C++20 language support, both on the compiler
and library sides [2], adds experimental C++23 support, some C2X enhancements,
various optimization enhancements and bug fixes, several new hardware
enablement changes and enhancements to the compiler back-ends and many other
changes.

Some code that compiled successfully with older GCC versions might require
source changes, see http://gcc.gnu.org/gcc-11/porting_to.html for
details.

[Xi Ruoyao]

glibc needs a patch: ​https://sourceware.org/git/?p=glibc.git;a=patch;h=162df872f0dfc2b124a18e1a8c33be63f70d9a1c

[Xi Ruoyao]

It can be simplified to a sed: sed 's/amx_/amx-/' -i sysdeps/x86/tst-cpu-features-supports.c.

[Xi Ruoyao]

constexpr-52830 and bad-mapper-3 FAIL.

asan_test.C, co-ret-17-void-ret-coro.C, pr95519-05-gro.C, pr80166.c no longer FAIL.

[Bruce Dubbs]

Are these two new failures mentioned at all in upstream builds?

[Xi Ruoyao]

There is no result posted in gcc-testresults for 11.1.0 now.

I'll report these two to gcc bugzilla.

[Xi Ruoyao]

52380 is mentioned at ​https://gcc.gnu.org/pipermail/gcc-testresults/2021-April/685744.html. It's a tricky bug in GCC since 4.8. The status quo is actually better: at least the compiler won't crash, but it still rejects the valid code.

[Xi Ruoyao]

bad-mapper-3 does not FAIL on the completed LFS system. In the log it says:

Temporary failure in name resolution mapper 'localhost:172477262'

I'm not sure what happened in LFS chroot: in theory our minimal /etc/hosts created in Chapter 7 should prevent this kind of issue.

[Xi Ruoyao]

I commented out the line for ::1 in /etc/hosts and this test FAILs again. So I think adding a line

::1 localhost

into chapter 7 /etc/hosts will prevent bad-mapper-3 failure.

[Bruce Dubbs]

Milestone renamed

[Douglas R. Reno]

Fixed at @d7a942197e713339d4dc1eedab4dafd4179a5cd8