Date: Mon, 28 Nov 2016 20:30:34 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-toolchain@FreeBSD.org Subject: [Bug 214902] head -r309179 buildworld on powerpc64 via clang 3.9.0: llvm::sys::CompareAndSwap and llvm::sys::MemoryFence undefined so build stops Message-ID: <bug-214902-29464-wjIV1kWRX3@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-214902-29464@https.bugs.freebsd.org/bugzilla/> References: <bug-214902-29464@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D214902 --- Comment #1 from Mark Millard <markmi@dsl-only.net> --- (In reply to Mark Millard from comment #0) The stage was: >>> stage 1.2: bootstrap tools During: --- _bootstrap-tools-usr.bin/clang/clang-tblgen --- and . . . --- _bootstrap-tools-usr.bin/clang/llvm-tblgen --- It looks like this llvm activity needs to compile and link in: llvm/lib/Support/Atomic.cpp which defines the two routines: #include "llvm/Support/Atomic.h" #include "llvm/Config/llvm-config.h" using namespace llvm; #if defined(_MSC_VER) #include <Intrin.h> #include <windows.h> #undef MemoryFence #endif #if defined(__GNUC__) || (defined(__IBMCPP__) && __IBMCPP__ >=3D 1210) #define GNU_ATOMICS #endif void sys::MemoryFence() { #if LLVM_HAS_ATOMICS =3D=3D 0 return; #else # if defined(GNU_ATOMICS) __sync_synchronize(); # elif defined(_MSC_VER) MemoryBarrier(); # else # error No memory fence implementation for your platform! # endif #endif } sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr, sys::cas_flag new_value, sys::cas_flag old_value) { #if LLVM_HAS_ATOMICS =3D=3D 0 sys::cas_flag result =3D *ptr; if (result =3D=3D old_value) *ptr =3D new_value; return result; #elif defined(GNU_ATOMICS) return __sync_val_compare_and_swap(ptr, old_value, new_value); #elif defined(_MSC_VER) return InterlockedCompareExchange(ptr, new_value, old_value); #else # error No compare-and-swap implementation for your platform! #endif } --=20 You are receiving this mail because: You are the assignee for the bug.=
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