FC4 failed dependence on ORBit-devel-0.5.17-15.i386.rpm

[Gavin Li]

I want to install this ORBit-devel rpm, but it dependence on 
ORBit =1:0.5.17
libIDL-0.6.so.0

I can't found rpm of "ORBit =1:0.5.17" and "libIDL-0.6.so.0", but I found
libIDL-devel-0.8.5-2.i386.rpm, I installed it, and it creates
/usr/lib/libIDL-2.so.0.0.0,
Then, I have to download libIDL-0.6.8.tar.gz from
http://andrewtv.org/libIDL/ and compile & install it:

tar -zxf libIDL-0.6.8.tar.gz
cd libIDL-0.6.8
./configure
make
make prefix=/usr/lib install

Everything goes fine,

And I tried to install ORBit-devel rpm, and failed on the same dependence
errors.