g3d build fails on Manjaro Linux: TBB fails to compile

[Ricardo Lopez]

Hello,

I get the following error when I try to build g3d:

This was the code used to download and build g3d, after setting the appropriate environment variables:

svn co --depth immediates https://svn.code.sf.net/p/g3d/code/ $g3d
svn up --set-depth immediates $g3d/data10
svn up --set-depth infinity $g3d/G3D10
svn up --set-depth infinity $g3d/data10/common
cd $g3d/G3D10
./buildg3d lib data tools

I tried building it again after downloading the full 10GB repo and I received the same error message.

I include the output of 'gcc -v' if that is useful:

Any help or suggestions would be greatly appreciated.

- Ricardo

[Ricardo Lopez]

I managed to build it successfully by commenting out the offending function in the header file task.h, at g3d/G3D10/external/tbb/include/tbb/task.h:

 

It compiled, but I have no idea if I'm opening myself up to UB here or anything like that. If something crashes later on I'll let you all know I guess lol

[Anrich Tait]

Since G3D was built for older compilers the version of TBB bundled with G3D doesn't meet C++ 20 standards. You can make the compiler less strict for only TBB with the following:

cd ~/Projects/G3D/G3D10/external/tbb/
sed -i 's/CXXFLAGS += -MMD/CXXFLAGS += -MMD -fpermissive -w/' build/Makefile.gcc


You can also use an older compiler