Hi,
Please keep non-English questions in the International Talk section.
You need the linux-headers-2.6.29.1-tinycore.tcz extension installed when compiling things that need kernel sources. Also, remember that if you use gcc-4.4.0 any extensions built with it would most likely depend on the updated gcc libs that are in that extension. Best to use the standard gcc that comes with the compiletc metapackage for normal use, unless the newer gcc is required.
Hope this helps.