https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FClangToTLinuxUBSanVptr%2F5925%2F%2B%2Frecipes%2Fsteps%2Fcompile%2F0%2Fstdout
[1680/46904] LINK ./nonsfi_loader
FAILED: nonsfi_loader 
python "../../build/toolchain/gcc_link_wrapper.py" --output="./nonsfi_loader" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -fuse-ld=gold -B../../third_party/binutils/Linux_x64/Release/bin -Wl,--threads -Wl,--thread-count=4 -nodefaultlibs -m64 -Werror -Wl,-O1 -Wl,--gc-sections --sysroot=../../build/linux/debian_jessie_amd64-sysroot -L../../build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -L../../build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -fsanitize=vptr -fsanitize-coverage=trace-pc-guard -Wl,-rpath-link=. -Wl,--disable-new-dtags -Wl,-rpath=\$ORIGIN/. -Wl,-rpath-link=. -o "./nonsfi_loader" -Wl,--start-group @"./nonsfi_loader.rsp"  -Wl,--end-group   -lc -lm -lgcc_s -lrt -ldl -lpthread 
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:163: error: undefined reference to 'typeinfo for __cxxabiv1::__si_class_type_info'
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:163: error: undefined reference to 'typeinfo for __cxxabiv1::__class_type_info'
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:163: error: undefined reference to '__dynamic_cast'
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:167: error: undefined reference to 'typeinfo for __cxxabiv1::__vmi_class_type_info'
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:167: error: undefined reference to '__dynamic_cast'
/b/c/builder/ClangToTLinuxUBSanVptr/src/third_party/llvm/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:163: error: undefined reference to '__dynamic_cast'


Nothing depends on the target, it's only built if you build 'all' (which most bots don't do, but this one does).

Looks like nonsfi_loader is C-only and doesn't need a C++ library usually. It does need abi stuff in asan mode though.

Do we just add the exe_and_shlib_deps dep anyways?