With the recent llvm-project C++17 switch (D130689), gwp_asan/tests may fail to
link with some versions of GCC (https://github.com/llvm/llvm-project/issues/56994):
> backtrace.cpp:(.text+0xca6): undefined reference to `gwp_asan::AllocationMetadata::kMaxTraceLengthToCollect'
I cannot reproduce this issue by myself, but notice that currently
lib/gwp_asan/*.cpp get -std=c++17 while lib/gwp_asan/tests/*.cpp don't
(therefore may use -std=g++14 default from Clang and older GCC). Using -std=c++17
for lib/gwp_asan/tests will ensure that backtrace.cpp uses inline variable and will assuredly avoid the
possible GCC issue.
In the long-term, we should add -std=c++17 to a central place like generate_compiler_rt_tests.
Reviewed By: dyung
Differential Revision: https://reviews.llvm.org/D131440
${COMPILER_RT_UNITTEST_CFLAGS}
${COMPILER_RT_GTEST_CFLAGS}
${SANITIZER_TEST_CXX_CFLAGS}
+ -std=c++17
-I${COMPILER_RT_SOURCE_DIR}/lib/
-O2
-g