ld.lld: error: linking module flags 'ProfileSummary': IDs have conflicting values

[Marshall Greenblatt]

Hi All,

I'm building Chromium at version 70.0.3507.0 (master #578961) on an Ubuntu 14.04 64-bit host machine using the below GN args [1]. Link commands are failing with the following error message:

[9/18009] LINK ./flatc

FAILED: flatc 

python "../../build/toolchain/gcc_link_wrapper.py" --output="./flatc" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -Wl,--build-id=sha1 -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--as-needed -fuse-ld=lld -Wl,--icf=all -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-jobs=8 -Wl,--thinlto-cache-dir=thinlto-cache -Wl,--thinlto-cache-policy,cache_size=10\%:cache_size_bytes=10g:cache_size_files=100000 -Wl,--lto-O0 -fwhole-program-vtables -m64 -Werror -Wl,-O2 -Wl,--gc-sections -nostdlib++ --sysroot=../../build/linux/debian_sid_amd64-sysroot -L../../build/linux/debian_sid_amd64-sysroot/usr/local/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_sid_amd64-sysroot/usr/local/lib/x86_64-linux-gnu -L../../build/linux/debian_sid_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_sid_amd64-sysroot/lib/x86_64-linux-gnu -L../../build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu -fsanitize=cfi-vcall -fsanitize=cfi-icall -rdynamic -Wl,-rpath-link=. -Wl,--disable-new-dtags -o "./flatc" -Wl,--start-group @"./flatc.rsp"  -Wl,--end-group   -ldl -lpthread -lrt 

/var/build/chromium/src/out/Debug_GN_x64/../../third_party/llvm-build/Release+Asserts/bin/ld.lld: error: linking module flags 'ProfileSummary': IDs have conflicting values

clang: error: linker command failed with exit code 1 (use -v to see invocation)

The failure does not reproduce when building Chromium version 69.0.3497.0 (master #576753) or older using the same GN args.

I tried googling the error message but find get any useful results. Does anyone know what might be causing this?

Thanks,

Marshall

[1] GN args:

clang_use_chrome_plugins=false

dcheck_always_on=true

enable_linux_installer=false

enable_nacl=false

enable_vulkan=false

fatal_linker_warnings=false

is_component_build=false

is_debug=false

is_official_build=true

symbol_level=1

target_cpu="x64"

use_allocator="none"

use_bundled_fontconfig=false

use_gtk3=false

use_sysroot=true