Ubuntu :: Compiling The OpenSceneGraph For FlightGear?

I'm following the instructions here, to compile OpenSceneGraph that I got on DVDs purchased from Curtis Olsen. The instruction for this step goes like this.

Quote:

mkdir osg_build
cd osg_build
cmake -D CMAKE_BUILD_TYPE="Release" -D CMAKE_CXX_FLAGS="-O3 -march=native"
CMAKE_C_FLAGS="-O3 -march=native" -D CMAKE_INSTALL_PREFIXATH="/usr" ../src

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So, I try that, and I get the following.

Quote:

-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works

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