Comment 5 for bug 635840

gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu4)
COLLECT_GCC_OPTIONS='-E' '-H' '-v' '-mtune=generic' '-march=i686'
 /usr/lib/gcc/i686-linux-gnu/4.4.5/cc1 -E -quiet -v -H foo.c -D_FORTIFY_SOURCE=2 -mtune=generic -march=i686 -fstack-protector
ignoring nonexistent directory "//usr/local/include/i686-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/i686-linux-gnu/4.4.5/../../../../i686-linux-gnu/include"
ignoring nonexistent directory "//usr/include/i686-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
 //usr/local/include
 /usr/lib/gcc/i686-linux-gnu/4.4.5/include
 /usr/lib/gcc/i686-linux-gnu/4.4.5/include-fixed
 //usr/include
End of search list.

now looking where this was introduced. Not seen with the current 4.4 and 4.5 in Debian unstable