I forgot one include statement, instead of (for example)
gcc -nostdinc -I/usr/i586-pc-linux-tomsrtbt/include \
-bi586-pc-linux-tomsrtbt $*
You need one more include statement:
gcc -nostdinc -I/usr/i586-pc-linux-tomsrtbt/include \
-I/usr/lib/gcc-lib/i586-pc-linux-tomsrtbt/2.7.2.3/include \
-bi586-pc-linux-tomsrtbt $*
Of course the exact path will depend on your system...
-Tom
