Can't link with btWorldImporter

[jiffygist]

This question was probably asked several times, but I haven't found a working solution.

I configure bullet (latest git version) like this cmake -DCMAKE_INSTALL_PREFIX=/home/herman/prog/build/bullet3-install/ -DBUILD_EXTRAS=ON -DUSE_DOUBLE_PRECISION=OFF -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_BUILD_TYPE=Release ... I didn't want to install it to /usr/local/ so it does not interfere with system package manager-installed bullet used for building openmw, that does require double precision, so I chose another location. So there are installed a bunch of .a files in bullet3-install/lib, including libBulletWorldImporter.a

I configure sr3 (latest git version) like this cmake -DCMAKE_BUILD_TYPE=Release -DBULLET_ROOT=/home/herman/prog/build/bullet3-install/ -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ..

However this error appears

/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x40): undefined reference to `btWorldImporter::createPlaneShape(btVector3 const&, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x50): undefined reference to `btWorldImporter::createSphereShape(float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x58): undefined reference to `btWorldImporter::createCapsuleShapeX(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x60): undefined reference to `btWorldImporter::createCapsuleShapeY(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x68): undefined reference to `btWorldImporter::createCapsuleShapeZ(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x70): undefined reference to `btWorldImporter::createCylinderShapeX(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x78): undefined reference to `btWorldImporter::createCylinderShapeY(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x80): undefined reference to `btWorldImporter::createCylinderShapeZ(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x88): undefined reference to `btWorldImporter::createConeShapeX(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x90): undefined reference to `btWorldImporter::createConeShapeY(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x98): undefined reference to `btWorldImporter::createConeShapeZ(float, float)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0xe0): undefined reference to `btWorldImporter::createMultiSphereShape(btVector3 const*, float const*, int)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0xf0): undefined reference to `btWorldImporter::createHeightfieldShape(int, int, void const*, float, float, float, int, int, bool)'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/sr-editor3.dir/src/common/SceneObjects.cpp.o:(.data.rel.ro._ZTV17BulletWorldOffset[_ZTV17BulletWorldOffset]+0x168): undefined reference to `btWorldImporter::createGearConstraint(btRigidBody&, btRigidBody&, btVector3 const&, btVector3 const&, float)'

Do I need to disable double precision in bullet? Do I need some changes in its cmake file? Do I need it to use shared libs instead of static? Another bullet version mb? Please help.

[jiffygist]

Output of cmake with find debug mode on is here: log.txt

I find it weird that it first uses the CMake/FindBULLET.cmake file and then also /usr/share/cmake/Modules/FindBullet.cmake which it is not supposed to be using and which has no mention of world importer.

[cryham]

If I remember right, I didn't use doubles for bullet so yes I advice to disable double precision in docs here.
I saw these errors myself, I think on Windows when building bullet from sources.
This option is USE_DOUBLE_PRECISION in Bullet CMake.

[jiffygist]

I added message line for module path before finding bullet

#  fix 5  bullet
message(STATUS "module path: " ${CMAKE_MODULE_PATH})
find_package( Bullet REQUIRED )

and it prints /home/herman/prog/build/sr3/Dependencies/Ogre/CMake/Packages. So I guess ogre lib ruined module path and sr3/CMake directory is not searched in. Ok I repeat the line that adds sr3/CMake directory in it

#  fix 5  bullet
message(STATUS "module path: " ${CMAKE_MODULE_PATH})
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/CMake/" ${CMAKE_MODULE_PATH})
find_package( Bullet REQUIRED )

Now the file is still not found, but if I copy CMake/FindBULLET.cmake to CMake/FindBullet.cmake it is found and now world importer is in ${BULLET_LIBRARIES}

[cryham]

Aah, so it builds okay now?
Does it mean I should rename FindBULLET.cmake to FindBullet.cmake?

[jiffygist]

It still cannot link static libraries in.

When I compile bullet as shared libraries, it gives warnings

/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: warning: libBulletDynamics.so.3.20, needed by /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/libBulletWorldImporter.so, may conflict with libBulletDynamics.so.3.26
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: warning: libBulletCollision.so.3.20, needed by /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/libBulletWorldImporter.so, may conflict with libBulletCollision.so.3.26
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: warning: libBulletFileLoader.so.3.20, needed by /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/libBulletWorldImporter.so, may conflict with libBulletFileLoader.so.3.26
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: warning: libLinearMath.so.3.20, needed by /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/libBulletWorldImporter.so, may conflict with libLinearMath.so.3.26
[100%] Built target stuntrally3

and produces an executable linked to both bullet 3.26 in my bullet3-install/ dir and my system bullet 3.20. Game works now but idk which one it uses.

[jiffygist]

After I changed target_link_libraries( ${EXE} ${BULLET_LIBRARIES} -lBulletWorldImporter ) to target_link_libraries( ${EXE} ${BULLET_LIBRARIES} ) it does not link the system bullet libs anymore. Yay!

Does it mean I should rename FindBULLET.cmake to FindBullet.cmake?

Yes, I think. And make sure this file is found by cmake. If include( CMake/Dependencies/OGRE.cmake ) resets CMAKE_MODULE_PATH mb configure ogre after bullet?

Also I don't know how to deal with this:

add_external_lib(
        BULLET
        bullet3/3.24
        REQUIRED
        FIND_PACKAGE
        CONAN_OPTIONS bullet3:extras=True bullet3:network_support=True
        INTERFACE_NAME Bullet::Bullet
)

This reports Invalid value "OFF" for option SR_USE_BULLET if you rename FindBULLET.cmake->FindBullet.cmake. I just commented this out.

[cryham]

Okay, yeah current cmake config is somewhat butchered by me to work.
add_external_lib( is I think for Conan, IDK maybe not needed. Or maybe it needs to be BULLET for Conan IDK.
BTW there is a branch there, in which Conan should resolve all deps (and probably builds bullet) it worked for me, I didn't yet merge it.