cc1 is missing libraries on linux

[Christer Solskogen <christer dot solskogen at gmail dot com>]

Hi!

I installed (from source) gmp, mpfr, mpc, ppl, cloog, binutils and gcc 
in the same PREFIX. Everything compiled just fine. But running gcc is 
another matter, or in fact, cc1. cc1 is missing a lot of libraries:

libcloog-isl.so.1 => not found
libisl.so.6 => not found
libppl_c.so.4 => not found
libppl.so.9 => not found
libgmpxx.so.4 => not found
libmpfr.so.4 => not found
libgmp.so.10 => not found
libdl.so.2 => /lib64/libdl.so.2 (0x0000003e20200000)
libc.so.6 => /lib64/libc.so.6 (0x0000003e1fe00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003e1fa00000)

Should't gcc find those automagicly?
Since this is a part of a cross-compiler, I used the exactly same 
scripts on my Mac, and Mac OS X finds those libraries without any troble.

otool -L cc1
cc1:
	/usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 
7.0.0)
	/Users/solskogen/cross-tools/lib/libcloog-isl.1.dylib (compatibility 
version 2.0.0, current version 2.2.0)
	/Users/solskogen/cross-tools/lib/libisl.6.dylib (compatibility version 
7.0.0, current version 7.0.0)
	/Users/solskogen/cross-tools/lib/libppl_c.4.dylib (compatibility 
version 5.0.0, current version 5.0.0)
	/Users/solskogen/cross-tools/lib/libppl.9.dylib (compatibility version 
10.0.0, current version 10.0.0)
	/Users/solskogen/cross-tools/lib/libgmpxx.4.dylib (compatibility 
version 7.0.0, current version 7.4.0)
	/Users/solskogen/cross-tools/lib/libmpc.2.dylib (compatibility version 
3.0.0, current version 3.0.0)
	/Users/solskogen/cross-tools/lib/libmpfr.4.dylib (compatibility version 
6.0.0, current version 6.0.0)
	/Users/solskogen/cross-tools/lib/libgmp.10.dylib (compatibility version 
11.0.0, current version 11.4.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current 
version 159.1.0)


--
chs