Getting started

[krux]

Hi

I want to make my first steps in using bullet. I downloaded the source, and installed in my Linux file system. I did nothing more than linking the static library, and included <btBulletDynamicsCommon.h>. I didn't even write a single line ob Bullet code, and this is what the compiler gave to me.

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g++ -Wl,-rpath,/home/arne/qtsdk-2010.02/qt/lib -o BulletUebung main.o -L/home/arne/qtsdk-2010.02/qt/lib -lSDL -lGL -lGLU -lLinearMath -lBulletCollision -lBulletDynamics -lQtGui -L/home/arne/qtsdk-2010.02/qt/lib -L/usr/X11R6/lib -lQtCore -lpthread
/usr/local/lib/libBulletDynamics.a(btTypedConstraint.o): In function `btRigidBody::~btRigidBody()':
btTypedConstraint.cpp:(.text._ZN11btRigidBodyD1Ev[btRigidBody::~btRigidBody()]+0x71): undefined reference to `btCollisionObject::~btCollisionObject()'
btTypedConstraint.cpp:(.text._ZN11btRigidBodyD1Ev[btRigidBody::~btRigidBody()]+0x5b): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::serialize(void*, btSerializer*) const':
btRigidBody.cpp:(.text+0x45d): undefined reference to `btCollisionObject::serialize(void*, btSerializer*) const'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::btRigidBody(float, btMotionState*, btCollisionShape*, btVector3 const&)':
btRigidBody.cpp:(.text+0x1c35): undefined reference to `btCollisionObject::btCollisionObject()'
btRigidBody.cpp:(.text+0x1d83): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::btRigidBody(float, btMotionState*, btCollisionShape*, btVector3 const&)':
btRigidBody.cpp:(.text+0x1da5): undefined reference to `btCollisionObject::btCollisionObject()'
btRigidBody.cpp:(.text+0x1ef3): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::btRigidBody(btRigidBody::btRigidBodyConstructionInfo const&)':
btRigidBody.cpp:(.text+0x1f0e): undefined reference to `btCollisionObject::btCollisionObject()'
btRigidBody.cpp:(.text+0x1f67): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::btRigidBody(btRigidBody::btRigidBodyConstructionInfo const&)':
btRigidBody.cpp:(.text+0x1f8e): undefined reference to `btCollisionObject::btCollisionObject()'
btRigidBody.cpp:(.text+0x1fe7): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o): In function `btRigidBody::~btRigidBody()':
btRigidBody.cpp:(.text._ZN11btRigidBodyD0Ev[btRigidBody::~btRigidBody()]+0x56): undefined reference to `btCollisionObject::~btCollisionObject()'
btRigidBody.cpp:(.text._ZN11btRigidBodyD0Ev[btRigidBody::~btRigidBody()]+0x79): undefined reference to `btCollisionObject::~btCollisionObject()'
/usr/local/lib/libBulletDynamics.a(btRigidBody.o):(.rodata._ZTI11btRigidBody[typeinfo for btRigidBody]+0x8): undefined reference to `typeinfo for btCollisionObject'
collect2: ld returned 1 exit status

I hope you can help me.

[ndujar]

Hi krux!
It seems to me that the linked libraries are misspelled...
In my system all the letters are lowercase (i.e. bulletmath, bulletcollision,...)...and from the error report I see you have the first letter of each word in Capitals...

Hopefully the solution is there!

Regards

[krux]

that was not the problem, I am shure, that i spelled everything correctly before I made the post here. I made a complete rebuild of bullet, this time in unix line endings, and with shared libraries on, and with the fix of the makefile listed here in the forum. Now it seems to work.

[ndujar]

Hi krux:

Great you fixed it!
Enjoy!

[krux]

it is not fixed, i thought, that I fixed it, but the shared library doesn't work, too. Now the problem comes with executing the program.

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arne@arne-laptop:~/QtCreatorProjects/BulletUebung$ ./BulletUebung 
./BulletUebung: error while loading shared libraries: libLinearMath.so.2.76: cannot open shared object file: No such file or directory

here is my /usr/local/lib folder:

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arne@arne-laptop:/usr/local/lib$ ls
libBulletCollision.a        libBulletDynamics.so.2.76  libLinearMath.so
libBulletCollision.so       libBulletSoftBody.a        libLinearMath.so.2.76
libBulletCollision.so.2.76  libBulletSoftBody.so       python2.6
libBulletDynamics.a         libBulletSoftBody.so.2.76  python3.1
libBulletDynamics.so        libLinearMath.a            site_ruby

i already tried to copy the shared libs into the project folder, that doesn't change anything.

[godlike]

Try an "ldd BulletUebung" and post the results.

Also try to run it like this:
setenv LD_LIBRARY_PATH /usr/local/lib
./BulletUebung

[krux]

thanks godlike, here is "ldd BulletUebung" result.

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        libLinearMath.so.2.76 => not found
        libBulletCollision.so.2.76 => not found
        libBulletDynamics.so.2.76 => not found

setenv LD_LIBRARY_PATH /usr/local/lib
made it. Now I hope that I can finally start to develop with bullet.

[godlike]

It looks like /usr/local/lib is an irregular library path. The executables try to load the dynamic libs from /usr/lib unless you override it by setting the LD_LIBRARY_PATH.

[krux]

somhow (don't ask why) it does now work without setting the LD_LIBRARY_PATH.