src/lib/libcxxrt, branch main

src: Use gnu++17 as the default C++ standard

2025-04-11T13:53:50Z

Previously the compiler's default C++ standard was used unlike C where bsd.sys.mk explicitly sets a default language version. Setting an explicit default version will give a more uniform experience across different compilers and compiler versions. gnu++17 was chosen to match the default C standard. It is well supported by a wide range of clang (5+) and GCC (9+) versions. gnu++17 is also the default C++ standard in recent versions of clang (16+) and GCC (11+). As a result, many of the explicit CXXSTD settings in Makefiles had the effect of lowering the C++ standard instead of raising it as was originally intended and are removed. Note that the remaining explicit CXXSTD settings for atf and liblutok explicitly lower the standard to C++11 due to use of the deprecated auto_ptr<> template which is removed in later versions. Reviewed by: imp, asomers, dim, emaste Differential Revision: https://reviews.freebsd.org/D49223

libcxxrt: Add a stub implementation of __cxa_call_terminate

2024-08-21T17:37:48Z

This function is called by GCC 14 if a destructor invoked during exception unwinding throws an exception. Reviewed by: emaste Obtained from: libcxxrt commit 391a3dcc1054e18c2f0dff4e14d6d79ac95399d7 Differential Revision: https://reviews.freebsd.org/D46004

libcxxrt: allow build with gcc13 and --no-undefined-version

2024-05-17T20:50:57Z

GCC 13 supports _Float16 and __int128 on fewer architectures than clang and thus libcxxrt compiled with gcc13 is sometimes missing related symbols. Hack around this by explicitly appending --undefined-version to LDFLAGS in problematic cases. Reviewed by: theraven, dim Differential Revision: https://reviews.freebsd.org/D45233

libcxxrt: align more with libc/Makefile

2024-04-22T20:28:51Z

Use src.opts.mk instead of bsd.own.mk and define PACKAGE first. Fixes: da77a1b4f0dff libcxxrt: don't export nonexistant symbols

libcxxrt: define SHLIBDIR before including bsd.own.mk

2024-04-22T18:46:45Z

Otherwise bsd.own.mk overrides it, causing libcxxrt.so.1 to be erroneously installed into /usr/lib. Also add an ObsoleteFiles.inc entry, for removing the bad copy. Reported by: Josef 'Jeff' Sipek Fixes: da77a1b4f0df

libcxxrt: don't export nonexistant symbols

2024-04-16T21:14:21Z

Remove version entries that we don't build. Add an arm specific Version.map and for other targets run the files through sed to handle int vs long in new and delete. Ideally we'd use the SYMBOL_MAPS functionality to preprocess with cpp, but it doesn't currently handle C++ symbols so be annoyingly duplicative for now. Differential Revision: https://reviews.freebsd.org/D44325

Merge libcxxrt master 03c83f5a57be8c5b1a29a68de5638744f17d28ba

2024-01-25T17:43:23Z

Interesting fixes (* were already cherry-picked): - 03c83f5 add __cxa_init_primary_exception (#23) * 5d8a158 Fix two bugs in __cxa_end_cleanup() * b00c6c5 Insert padding in __cxa_dependent_exception * 45ca8b1 Insert padding in __cxa_exception struct for compatibility * f2e5509 Fix unlock in two-word version and add missing comment. - 6229590 Add an option for disabling emergency buffers. (#14) MFC after: 2 weeks

Remove $FreeBSD$: one-line sh pattern

2023-08-16T17:55:03Z

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Sort SRCS in libcxxrt's Makefile, and use += to list sources

2022-01-22T20:08:55Z

No functional change intended. MFC after: 3 days

Only set WARNS if not defined

2020-09-11T13:28:37Z

This would allow interested parties to do experimental runs with an environment set appropriately to raise all the warnings throughout the build; e.g. env WARNS=6 NO_WERROR=yes buildworld. Not currently touching the numerous instances in ^/tools. MFC after: 1 week