Clang 3.9 regression causes a bug when generating code for
std::atomic_compare_and_exchange*(std::atomic<long long>,...) without
optimizations. If same code is compiled with -O2 tests pass without problems.
Atomics are implement in headers with builtin functions which makes this
affect application code instead of libc++ library code.
libcxx tests default to -O0 compilation so these test need to be marked failing
on arm to allow installing packages. Use cases is so borderline failure that it
shouldn't prevent building the package. (64bit atomics in 32bit mode)
Gbp-Pq: Topic libcxx
Gbp-Pq: Name libcxx-test-atomics-set-compare-exchange-to-be-expected-fails-on-arm.patch
Fix arm EHABI code to work. armhf had exception test failing without EHABI support.
No known upstream bug about this. Actual code change is more like workaround than
something that upstream would accept. Proper fix would be adding _Unwind_Control_Block
to clang unwind.h. _Unwind_Control_Block should also extend _Unwind_Exception to make
sure their ABI stays in sync.
No known upstream bug about this.
Gbp-Pq: Topic libcxx
Gbp-Pq: Name libcxxabi-arm-ehabi-fix.patch
Lock is_always_lock free test fails on i386 because std::atomic is aligned
Lock is_always_lock free test fails on i386 because std::atomic is aligned
to 8 bytes while long long is aligned to 4 bytes. clang can't generate inline
code for unaligned 8 byte atomics even tough instruction set and gcc support
it.
That makes it expected thaqt ATOMIC_LLONG_LOCK_FREE and
std::atomic<long long>::is_always_lock_free don't match on i386. Correct test
for std::atomic<long long> is to check if target cpu support cmpxchg8 instruction.
To set instruction support one can check __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 define.
Bug: https://llvm.org/bugs/show_bug.cgi?id=19355
Gbp-Pq: Topic libcxx
Gbp-Pq: Name libcxx-test-fix-lockfree-test-for-i386.patch
Powerpc has extended double that doesn't match x86 coding. Power format would
need special tests to verify correctness but for now it is enough to prevent
incorrect test from running.
Gbp-Pq: Topic libcxx
Gbp-Pq: Name libcxxabi-test-don-t-fail-extended-long-double.patch
lldb-server exec users always /usr/bin/lldb-server. Server is required
for any debugging with lldb which makes it unusable unless default version
package has been installed. Small changes to code and debian/rules allows
a workaround for lldb-server start up.
To use this one needs to add cmake definition during configure. eg
-DDEBIAN_VERSION_SUFFIX=-$(LLVM_VERSION)
Better implementation would be to use /usr/share/llvm-$(VERSION)/bin but
that change seems to require a big change to the path handling code
which could then break something else.
This probably should have upstream bug but I couldn't find any existing report.
Gbp-Pq: Topic lldb
Gbp-Pq: Name lldb-addversion-suffix-to-llvm-server-exec.patch
/tmp/buildd/llvm-toolchain-snapshot-4.0~svn279801/llvm/test/tools/llvm-symbolizer/print_context.c:16:11: error: expected string not found in input
// CHECK: inc
^
<stdin>:1:1: note: scanning from here
_fini
^
<stdin>:1:3: note: possible intended match here
_fini
^
Last-Update: 2016-08-26
Gbp-Pq: Name disable-llvm-symbolizer-test.diff
Command Output (stderr):
--
/build/llvm-toolchain-snapshot-4.0~svn279916/llvm/test/tools/gold/X86/start-lib-common.ll:22:10: error: expected string not found in input
; CHECK: @x = common global i32 0, align 8
^
<stdin>:1:1: note: scanning from here
; ModuleID = '/build/llvm-toolchain-snapshot-4.0~svn279916/build-llvm/llvm/test/tools/gold/X86/Output/start-lib-common.ll.tmp3.o'
^
<stdin>:4:1: note: possible intended match here
@x = common global i32 0, align 4
^
Gbp-Pq: Name silent-gold-test.diff
Ensure that symlinks such as /usr/lib/llvm-X.Y/cmake (pointing to
lib/cmake/llvm) are resolved. This ensures that LLVM_INSTALL_PREFIX
becomes /usr/lib/llvm-X.Y instead of /usr.
Partially addresses PR37128
Gbp-Pq: Name 0001-llvm-cmake-resolve-symlinks-in-LLVMConfig.cmake.patch
Ensure that symlinks such as /usr/lib/cmake/clang-X.Y (pointing to
/usr/lib/llvm-X.Y/lib/cmake/llvm) are resolved. This ensures that
CLANG_INSTALL_PREFIX ends up to be /usr/lib/llvm-X.Y instead of /usr.
Partially addresses PR37128
Gbp-Pq: Name 0001-tools-clang-cmake-resolve-symlinks-in-ClangConfig.cmake.patch
# Without this patch, the first local include of unwind.h might, with the
# __has_include_next, try to include the one from the system.
# It might be /usr/include/clang/3.4/include/unwind.h
# Because of the #ifndef __CLANG_UNWIND_H, it might never include any declaration
# from the system.
Gbp-Pq: Name unwind-chain-inclusion.diff
# Force the version of clang in the analyzer
# This was causing the static analyzer to fail silently if the clang & clang++ are
# not installed
Gbp-Pq: Name clang-analyzer-force-version.diff
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