GCC 11+ on Intel CI runners (Skylake-X, Ice Lake, Sapphire Rapids)
emits AVX-512/AVX10 instructions for std::string / memcpy inlining
that crash with SIGILL on AMD EPYC and older Intel without those
extensions. Root cause: libstdc++ is statically linked into the
binary, so the build host's instruction set becomes a hard runtime
requirement.
The CI binary crashed immediately on DNS2/DNS3 (AMD EPYC Milan) with:
traps: trianglesd[...] trap invalid opcode ip:...e432 error:0
in trianglesd[...+af3000]
Disassembly of the crash site (file offset 0x15b432):
62 f1 7f 08 6f 41 ff vmovdqu8 -0x10(%rcx), %xmm0
This is an AVX10/AVX-512 instruction emitted inside
std::basic_string::basic_string (statically linked libstdc++).
Fix: -march=x86-64-v2 -mtune=generic for all Linux x86_64 builds.
v2 baseline (SSE4.2 + POPCNT + CMPXCHG16B) is from 2009 Nehalem and
supported on every x86_64 CPU we ship to. Override-able via
-DCMAKE_X86_64_BASELINE=OFF if a CPU-specific build is needed.
C++20 broke two things in the prior bump:
1. std::allocator no longer exposes pointer/const_pointer/reference/
const_reference member typedefs, and the 2-arg allocate(n, hint) was
removed. Both secure_allocator and zero_after_free_allocator inherited
these from std::allocator. Define the typedefs ourselves and switch
the secure_allocator allocate() to the single-arg form.
2. Bundled src/leveldb uses `std::memory_order::memory_order_relaxed`
which was valid in C++17 but became a hard error in C++20 (memory_order
is now a scoped enum class — the values are at namespace scope or
memory_order::relaxed, not memory_order::memory_order_relaxed). LevelDB
itself only needs C++11, so pin its targets to C++17 in BuildLevelDB.cmake
instead of patching vendored code.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Fix moneysupply calculation in FastImportBlockFile and ConnectBlock assumevalid path
- Route bootstrap downloads through Tor SOCKS proxy (no more clearnet leaks)
- Remove hardcoded clearnet fallback IP from bootstrap
- Fix snprintf missing argument in walletmodel.cpp narration key (UB/crash)
- Fix potential null deref from db_strerror() in rpcwallet.cpp
- Filter non-.onion addresses from HTTPS seed list parser
- Add periodic re-seeding when node has 0 outbound peers
- Make clientversion.h single source of truth for version display string
- Remove redundant DISPLAY_VERSION macros from version.h
- Update README: max supply 2,222,222, CMake build instructions, Tor-only config
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The -Wl,-z,relro and -Wl,-z,now flags are ELF-specific and not
supported by macOS's linker. Guard them with if(NOT APPLE).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Remove legacy build files (Makefile, makefile.unix/mingw/osx,
triangles-qt.pro) and replace with CMake build system. Includes
find modules for all dependencies, LevelDB bundled build, and
updated CI workflow for CMake + Ninja on all platforms.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
sami7777
Krystie