sanitizers=true fails to build

[matthiaskrgr]

I'm using clang/llvm to build (instead of gcc).

git clone https://github.com/rust-lang/rust/ --depth=1
cd rust
cp config.toml.example > config.toml

make sure sanitizers are built:
config.toml:

# Build the sanitizer runtimes
sanitizers = true

use llvm ar and ranlib

ar = "llvm-ar"
ranlib = "llvm-ranlib"

./x.py build

fails to build:

make[3]: Leaving directory '/home/matthias/vcs/github/rust__asan_test/build/x86_64-unknown-linux-gnu/native/sanitizers/build'
make[3]: Entering directory '/home/matthias/vcs/github/rust__asan_test/build/x86_64-unknown-linux-gnu/native/sanitizers/build'
[ 54%] Building CXX object lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_openbsd.cc.o
[ 54%] Building CXX object lib/asan/CMakeFiles/RTAsan.x86_64.dir/asan_allocator.cc.o
[ 54%] Building CXX object lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cc.o
/home/matthias/vcs/github/rust__asan_test/src/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cc:1132:1: error: 'assertion_failed__1132' declared as an array with a negative size
CHECK_SIZE_AND_OFFSET(ipc_perm, mode);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/matthias/vcs/github/rust__asan_test/src/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h:1437:3: note: expanded from macro 'CHECK_SIZE_AND_OFFSET'
  COMPILER_CHECK(sizeof(((__sanitizer_##CLASS *) NULL)->MEMBER) == \
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/matthias/vcs/github/rust__asan_test/src/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h:336:30: note: expanded from macro 'COMPILER_CHECK'
#define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/matthias/vcs/github/rust__asan_test/src/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h:342:57: note: expanded from macro 'IMPL_COMPILER_ASSERT'
    typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1]
                                                        ^~~~~~~~~~~~~~~
1 error generated.
make[3]: *** [lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/build.make:336: lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cc.o] Error 1
make[3]: Leaving directory '/home/matthias/vcs/github/rust__asan_test/build/x86_64-unknown-linux-gnu/native/sanitizers/build'
make[2]: *** [CMakeFiles/Makefile2:1028: lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/all] Error 2
make[2]: *** Waiting for unfinished jobs....

[matthiaskrgr]

For the record, I am at e2223c9
I believe this is a recent regression, probably introduced in the last 1-2 days.

[matthiaskrgr]

I'm wondering if this was caused by rust-lang/llvm-project@9f65ad0 / #69473

[matthiaskrgr]

Nope, reverting that did not fix the build failure..

[nikomatsakis]

cc @tmiasko

[tmiasko]

AFAICS #67759 includes a fix (glibc 2.31 changed ABI: https://reviews.llvm.org/D70662).