$NetBSD: README.gcc12,v 1.29 2024/09/23 10:28:54 rin Exp $

$NetBSD: README.gcc12,v 1.29 2024/09/23 10:28:54 rin Exp $

new stuff:
libmpx
liboffloadmic
libvtv
libcet
libphobos
d
gfortran
libbacktrace: +dwarf5_CFLAGS = $(libbacktrace_TEST_CFLAGS) -gdwarf-5
c++tools

todo:
- audit all uses of new warning-disable variables and
convert some from -Wno- to -Wno-error=

arch/feature list.

tools: does build.sh tools work?
kernels: does a kernel run? y (yes), b (builds/ready), p (partially), ? (not ready)
libgcc: does libgcc build?
native-gcc: does a full mknative-gcc complete?
sani: has sanitizer been ported to this CPU again for GCC 12? b (build) y (works)
make release: does build.sh release complete? (before sanitizer - bs)
runs: does the system boot with a full world?
atf: does atf run / compare well
switched: has port switched? y (yes), n (no/ready), ? (not ready)

architecture tools kernels libgcc native-gcc/sani make release runs atf switched
------------ ----- ------- ------ --------------- ------------ ---- --- --------
aarch64 y y y y y[17] y y y y
aarch64eb y y y y y[17] y y y y
alpha y y y y b y y y y
earmv4 y b ? y ? ? ? ? y
earmv4eb y b ? y ? ? ? ? y
earmv5 y y y y b y y y y
earmv5eb y y y y b y y y y
earmv5hf y b ? y ? ? ? ? y
earmv5hfeb y b ? y ? ? ? ? y
earmv6 y b ? y ? ? ? ? y
earmv6eb y b ? y ? ? ? ? y
earmv6hf y y y y b y y y y
earmv6hfeb y y y y b y y y y
earmv7 y b y y ? ? ? ? y
earmv7eb y b ? y ? ? ? ? y
earmv7hf y y y y b y y y y
earmv7hfeb y y y y b y y y y
hppa y y y y ? y y y y
i386 y y y y y y y y y
ia64 y b y y y y y[3] n y
m68000 y y y y b n y[14] ? y
m68k y y y y b y y[14] y[14] y
mipseb y b y y b y y y y
mipsel y b y y b y y ? y
mips64eb y b y y b y y y y
mips64el y b y y b y y ? y
powerpc y y y y y y y y y
powerpc64 y ? ? y b b ? ? y
sh3eb y ? y y b y ? ? y
sh3el y y y y b y y y y
sparc y y y y n[26] y y y y
sparc64 y b y y n[16] y y ? y
vax y y y y n[23] n n[24,25] ? ?
x86_64 y y y y y[13] y y y y
riscv32 y y y y b y n[2] ? y
riscv64 y y y y b y y y y
------------ ----- ------- ------ --------------- ------------ ---- ---
architecture tools kernels libgcc native-gcc/sani make release runs atf

[2]: riscv32 kernels are not really implemented yet, not GCC 12 issue.
[3]: GENERIC.SKI boots just as well as GCC 10.
[13]: on amd64, with very basic test, lsan, ubsan, and asan work, but tsan crashes at start up:
ThreadSanitizer: CHECK failed: tsan_rtl.cpp:149 "((reinterpret_cast<uptr>(this) % 64)) == ((0))" (0x10, 0x0) (tid=21499)
ThreadSanitizer:DEADLYSIGNAL
==21499==ERROR: ThreadSanitizer: SEGV on unknown address 0x000000000017 (pc 0x7f7ff4e5e14e bp 0x7f7fffffdbd0 sp 0x7f7fffffdb40 T21499)
==21499==The signal is caused by a READ memory access.
==21499==Hint: address points to the zero page.
ThreadSanitizer:DEADLYSIGNAL
ThreadSanitizer: nested bug in the same thread, aborting.
[14]: "dd count=1", "env LC_CTYPE=en_US.UTF-8 locale", and "tests/crypto/libcrypto/h_evp_test evpmd_blake.txt" abort.
adding -fno-stack-protector to strsuftoll.c, citrus_module.c, and blake2_prov.c, respectively, works around the problem.
-- workarounds commited.
[16]: sanitizers crash early:
Program received signal SIGSEGV, Segmentation fault.
(gdb) bt
#0 0x000000004064265c in __sanitizer::CheckASLR () at /usr/src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux.cpp:2181
#1 0xffffffffffffc704 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
-- some wip patches make this less bad
[17]: (NOT A REGRESSION) libtsan is newly introduced, which fails with:
FATAL: ThreadSanitizer: unexpected memory mapping 0x200100000-0x200101000
[23]: sanitizers fail to build:
sanitizer_flag_parser.h:141:72: error: format '%zx' expects argument of type 'size_t', but argument 4 has type 'unsigned int' [-Werror=format=]
[24]: (NOT A REGRESSION) c++ exception handling is broken. mechanically applying
http://www.execsw.org/netbsd/changeset.cgi?id=20140318T234341Z.c59ac4642e7d4b345f6dc5aa9887e9e1f9aa459a#src/gnu/dist/gcc4/gcc/config/vax/vax.c
does not help (with adjustments for gcc 10.5.0, which is broken, too):
(gdb) invalid-command
[1] Illegal instruction (core dumped) gdb
[25]: (maybe not related to [24]) native gcc is broken:
simh# cc hello.c
during RTL pass: final
hello.c: In function 'main':
hello.c:9:1: internal compiler error: Segmentation fault
[26]: divide by zero with ubsan hits CheckLocked assertion failure, and stalls at LockSlow indefinitely:
(gdb) bt
#0 __sanitizer::StaticSpinMutex::LockSlow at sanitizer_mutex.cpp:24
...
#17 __ubsan::ScopedReport::CheckLocked ubsan_diag.h:255
#18 __ubsan::Diag::~Diag ubsan_diag.cpp:347
#19 handleDivremOverflowImpl ubsan_diag.h:210
#20 __ubsan::__ubsan_handle_divrem_overflow ubsan_handlers.cpp:320

CPU vs platform test table (for CPUs with multiple ports). this is "make release" or just kernels.
values: y (yes), k (kernels only), n (failed), r (running), ? (not attempted), nx (yes, no x11), nk (no kernels available)

CPU platform list
--- -------- ----
acorn32 cats epoc32 evbarm-eb evbarm-el hpcarm iyonix netwinder shark zaurus
earmv4: k k k k k k k y
earm: nx nx k k
earmhf: k k
earmv6: k k
earmv6hf: nx nx
earmv7: k k
earmv7hf: nx nx

amiga atari cesfic hp300 luna68k mac68k mvme68k news68k next68k sun3 x68k
m68k: nx k k k k nx k k k nx k

evbmips emips ews4800mips mipsco newsmips sgimips
mipseb: k k k k k y

evbmips algor arc cobalt hpcmips pmax
mipsel: k k k k k y

algor evbmips pmax
mips64eb: y
mips64el: k y y

amigappc bebox evbppc ibmnws macppc mvmeppc ofppc prep rs6000 sandpoint
powerpc: k k k k y k k k k k

evbppc macppc ofppc
powerpc64: nk nk nk

dreamcast evbsh3 hpcsh landisk mmeye
sh3eb: y k
sh3el: k y k k