I'm having trouble building OpenEXR under Fedora15 using CMake (as I've used under Windows and OSX previously).
Scanning dependencies of target b44ExpLogTable
[ 1%] Building CXX object IlmImf/CMakeFiles/b44ExpLogTable.dir/b44ExpLogTable.cpp.o
Linking CXX executable b44ExpLogTable
[ 1%] Built target b44ExpLogTable
Scanning dependencies of target IlmImf
[ 1%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfAttribute.cpp.o
[ 2%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfBoxAttribute.cpp.o
[ 2%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfCRgbaFile.cpp.o
[ 3%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfChannelList.cpp.o
[ 3%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfChannelListAttribute.cpp.o
[ 4%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfFloatAttribute.cpp.o
[ 5%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfFrameBuffer.cpp.o
[ 5%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfHeader.cpp.o
[ 6%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfIO.cpp.o
[ 6%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfInputFile.cpp.o
[ 7%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfIntAttribute.cpp.o
[ 8%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfLineOrderAttribute.cpp.o
[ 8%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfMatrixAttribute.cpp.o
[ 9%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfOpaqueAttribute.cpp.o
[ 9%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfOutputFile.cpp.o
[ 10%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfRgbaFile.cpp.o
[ 11%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfStringAttribute.cpp.o
[ 11%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfVecAttribute.cpp.o
[ 12%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfHuf.cpp.o
[ 12%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfThreading.cpp.o
[ 13%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfWav.cpp.o
[ 14%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfLut.cpp.o
[ 14%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfCompressor.cpp.o
[ 15%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfRleCompressor.cpp.o
[ 15%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfZipCompressor.cpp.o
[ 16%] Building CXX object IlmImf/CMakeFiles/IlmImf.dir/ImfPizCompressor.cpp.o
make[2]: *** No rule to make target `../b44ExpLogTable.h', needed by `IlmImf/CMakeFiles/IlmImf.dir/ImfB44Compressor.cpp.o'. Stop.
make[1]: *** [IlmImf/CMakeFiles/IlmImf.dir/all] Error 2
make: *** [all] Error 2
Just a side note: The same source code and cmake files have all been working for OSX and Windows.