Apple clang 14.0.0 (Xcode 14.0.1) M1 coredumps compiling abc .c files

[stefanottili]

Hi Folks,

just a heads up for anybody using an Apple M1 with the most recent Xcode 14.0.1

Apple clang 14.0.0 randomly coredumps compiling abc .c files. But not deterministically, restarting ./build_openroad.sh will eventually compile some of them til it finally always coredumps compiling extraUtilMisc.c.

I was able to compile OpenROAD on this machine before, but not with the latest and greatest Xcode.

I'm curious whether there are other M1/Xcode users out there with similar experience.

Stefan

gmake[2]: Entering directory '/Users/user/OpenROAD-flow-scripts/tools/OpenROAD/build'
[ 0%] Building CXX object third-party/abc/CMakeFiles/libabc.dir/src/misc/extra/extraUtilMisc.c.o
cd /Users/user/OpenROAD-flow-scripts/tools/OpenROAD/build/third-party/abc && /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -I/Users/user/OpenROAD-flow-scripts/tools/OpenROAD/third-party/abc/src -O3 -DNDEBUG -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk -Wall -Wno-array-bounds -Wno-nonnull -Wno-unused-variable -Wno-unused-function -Wno-write-strings -Wno-sign-compare -Wno-deprecated -Wno-c++11-narrowing -Wno-register -Wno-format -Wno-reserved-user-defined-literal -DABC_USE_STDINT_H=1 -DABC_MEMALIGN=4 -DABC_NAMESPACE=abc -fpermissive -DABC_USE_CUDD=1 -DABC_USE_PTHREADS -Wno-unused-but-set-variable -std=c++17 -MD -MT third-party/abc/CMakeFiles/libabc.dir/src/misc/extra/extraUtilMisc.c.o -MF CMakeFiles/libabc.dir/src/misc/extra/extraUtilMisc.c.o.d -o CMakeFiles/libabc.dir/src/misc/extra/extraUtilMisc.c.o -c /Users/user/OpenROAD-flow-scripts/tools/OpenROAD/third-party/abc/src/misc/extra/extraUtilMisc.c
clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Apple clang version 14.0.0 (clang-1400.0.29.102)
Target: arm64-apple-darwin21.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

[stefanottili]

downgrading the command line tools to 13.4 allows to build the project

[stefanottili]

Here's some feedback from https://developer.apple.com/forums/thread/717259

It only happens with optimized code. An alternative workaround for building openroad is to patch the abc cmake file to include -g

third-party/CMakeLists.txt @@ -46,6 +46,10 @@ if (NOT USE_SYSTEM_ABC)
readline is not needed since we call abc from c++
set(READLINE_FOUND FALSE)
+# apple clang 14.0.0 seg faults on abc without -g +add_compile_options(
$<$<CXX_COMPILER_ID:AppleClang>:-g>
+) add_subdirectory(abc)
endif()

[stefanottili]

clang-1400.0.29.202 as part of Xcode 14.1.0 compiles OpenRoad without issues