Compile error in 1.10.0 while using GCC 11 #3219
Description
The build error is caused by a new warning (something may be used uninitialized) in GCC 11 and -Werror in CMake configuration of gtest.
Master branch has fixed this compile error, but sometimes we cannot use the master version, i.e. while we use some package/dependency managers like vcpkg.
- OS: Linux 5.8.18-1-MANJARO
- Compiler: g++ (GCC) 11.0.0 20201227 (experimental)
Scanning dependencies of target gtest
[ 12%] Building CXX object googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.o
In file included from /home/twice/googletest/googletest/src/gtest-all.cc:42:
/home/twice/googletest/googletest/src/gtest-death-test.cc: In function ‘bool testing::internal::StackGrowsDown()’:
/home/twice/googletest/googletest/src/gtest-death-test.cc:1301:24: error: ‘dummy’ may be used uninitialized [-Werror=maybe-uninitialized]
1301 | StackLowerThanAddress(&dummy, &result);
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
/home/twice/googletest/googletest/src/gtest-death-test.cc:1290:13: note: by argument 1 of type ‘const void*’ to ‘void testing::internal::StackLowerThanAddress(const void*, bool*)’ declared here
1290 | static void StackLowerThanAddress(const void* ptr, bool* result) {
| ^~~~~~~~~~~~~~~~~~~~~
/home/twice/googletest/googletest/src/gtest-death-test.cc:1299:7: note: ‘dummy’ declared here
1299 | int dummy;
| ^~~~~
cc1plus: all warnings being treated as errors
make[2]: *** [googletest/CMakeFiles/gtest.dir/build.make:82：googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.o] error 1
make[1]: *** [CMakeFiles/Makefile2:219：googletest/CMakeFiles/gtest.dir/all] error 2
make: *** [Makefile:160：all] error 2
I also created an issue in vcpkg (microsoft/vcpkg#15617).