Compile error with Ubuntu 20.04 and g++11/12, but works with clang 14 about physx HOT 6 CLOSED

Also fails in the same way with g++12 on Ubuntu 22.04.

from physx.

Thanks for reporting. While I don't see your exact error, compilation with gcc11 indeed fails. We've narrowed down the issue and it will be fixed in the next version.

As a workaround for now, you can try adjusting the build flags for gcc, in particular remove -Werror and add -fpermissive. The easiest place to change this is in source/compiler/cmake/linux/CMakeLists.txt at the line that begins with SET(GCC_WARNINGS ...

from physx.

I tried -fpermissive and updated to the latest PhysX release but I am still getting the error. Here is the full command that CMake is running to compile PxMetaDataObjects.h:

/usr/bin/g++-11 -DNDEBUG -DPX_PHYSX_GPU_SHARED_LIB_NAME=libPhysXGpu_64.so -DPX_PHYSX_STATIC_LIB -DPX_PUBLIC_RELEASE=1 -DPX_SUPPORT_OMNI_PVD=0 -DPX_SUPPORT_PVD=0 -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/common/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/common/src -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/physx/src -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/physx/src/device -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/physxgpu/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/contact -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/common -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/convex -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/distance -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/sweep -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/gjk -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/intersection -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/mesh -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/hf -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/pcm -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/geomutils/src/ccd -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowlevel/api/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowlevel/software/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowlevel/common/include/pipeline -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowlevel/common/include/utils -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowlevelaabb/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/lowleveldynamics/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/simulationcontroller/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/simulationcontroller/src -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/scenequery/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/physxmetadata/core/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/immediatemode/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/pvd/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/omnipvd -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/pvdruntime/include -I/home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/foundation/include -std=c++11 -fno-rtti -fno-exceptions -ffunction-sections -fdata-sections -fno-strict-aliasing -Wall -Werror -Wno-array-bounds -Wno-class-memaccess -Wno-invalid-offsetof -Wno-mismatched-new-delete -Wno-nonnull-compare -Wno-pragmas -Wno-uninitialized -Wno-unused-function -O3 -fPIC -w -std=gnu++20 -MD -MT deps/physx/physx/compiler/public/sdk_source_bin/CMakeFiles/PhysX.dir/__/__/physxmetadata/core/src/PxMetaDataObjects.cpp.o -MF deps/physx/physx/compiler/public/sdk_source_bin/CMakeFiles/PhysX.dir/__/__/physxmetadata/core/src/PxMetaDataObjects.cpp.o.d -o deps/physx/physx/compiler/public/sdk_source_bin/CMakeFiles/PhysX.dir/__/__/physxmetadata/core/src/PxMetaDataObjects.cpp.o -c /home/runner/work/RavEngine/RavEngine/deps/physx/physx/source/physxmetadata/core/src/PxMetaDataObjects.cpp

from physx.

This is surprising because we're testing the release in a clean containerized Ubuntu environment the respective default clang and gcc versions, i.e., Ubuntu 20.04 LTS with gcc 9 or clang 10 and Ubuntu 22.04 LTS with gcc 11 or clang 14, and have not seen any problems.

Are you using a customized setup to build PhysX?

Your original post indicates that the compile error happens when compiling PxAutoGeneratedMetaDataObjects.cpp. Your most recent post shows the build flags for PxMetaDataObjects.cpp. Just copying them for readability, the flags are

-std=c++11 -fno-rtti -fno-exceptions -ffunction-sections -fdata-sections -fno-strict-aliasing 
-Wall -Werror		-Wno-array-bounds		-Wno-class-memaccess		-Wno-invalid-offsetof		
-Wno-mismatched-new-delete		-Wno-nonnull-compare		-Wno-pragmas		-Wno-uninitialized		
-Wno-unused-function	 -O3 -fPIC -w -std=gnu++20 -MD -MT

and do not include -fpermissive as far as I can tell. Can you double-check that the flags for the actual file that produces errors are set correctly? I know the error happens in the header file, but that header is included from multiple source files, so it's important that you're actually working with the right cpp file.

Once you figured out which file exactly it is and ruled out other problems, you can apply a patch similar to the lines in source/compiler/cmake/linux/PhysX.cmake#L122, i.e., something like

IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  SET_SOURCE_FILES_PROPERTIES(${PX_SOURCE_DIR}/omnipvd/OmniPvdPxSampler.cpp PROPERTIES COMPILE_FLAGS "-fpermissive -Wno-error")
ENDIF()

from physx.

I was able to find the issue - I had set CMAKE_CXX_STANDARD earlier in my top-level CMakeLists.txt to C++20 which was affecting PhysX and causing the error with g++. Removing this fixed the issue for me. In my testing I could set the standard up to C++17 without issues on g++, the error started happening only on C++20. Thanks!

from physx.

Great, thanks for letting us know!

from physx.