Helloworld on Mac OS X 10.4 with version 2.75-RC5b

[sanjuda]

trying to install bullet and to use it to run the helloworld application
i used

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 cmake -DBUILD_SHARED_LIBS=ON
make
 

I had the following issues:

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ld: common symbols not allowed with MH_DYLIB output format with the -multi_module option

this is solved using

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cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_SHARED_LINKER_FLAGS=-single_module
make

then you get:

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../bullet-2.75-RC5b/src/BulletMultiThreaded/PosixThreadSupport.cpp: In function 'sem_t* createSem(const char*)':
../bullet-2.75-RC5b/src/BulletMultiThreaded/PosixThreadSupport.cpp:61: error: ISO C++ forbids comparison between pointer and integer

this is solved by changing src/BulletMultiThreaded/PosixThreadSupport.cpp line 61 from

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        if (tempSem != SEM_FAILED)
[\code]
to 
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                if (tempSem == reinterpret_cast<sem_t *>(SEM_FAILED))
[\code]
then you get (and there you start at least to grin)
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[ 85%] Building CXX object src/BulletMultiThreaded/CMakeFiles/BulletMultiThreaded.dir/MiniCLTask/MiniCLTask.o
Linking CXX shared library libBulletMultiThreaded.dylib
ld: Undefined symbols:
_btGpu_computeGridSize
/usr/bin/libtool: internal link edit command failed
make[2]: *** [src/BulletMultiThreaded/libBulletMultiThreaded.dylib] Error 1
[\code]
you solve it using the patch at 
[url]http://code.google.com/p/bullet/issues/detail?id=246[/url]
and apply it:
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cd src/BulletMultiThreaded/
patch -p 2 <~/Desktop/missing-_btGpu_computeGridSize-PROPER.diff 
[\code]

now you can install 
everything using
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sudo make install
[\code]

and test everything with the demo called helloworld

[Erwin Coumans]

Latest trunk includes both fixes, it didn't make it in RC6 but final version will be fine.

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  if (tempSem != reinterpret_cast<sem_t *>(SEM_FAILED))

(I assume you meant the !=)

Thanks for the feedback.
Erwin