Move main body into configure _Test method
Add initial LTO support
Move Allow_marker_view, AlwaysLighting into DXX_BUILD_DESCENT_II
Move terrain y cache onto stack
Remove never used vm_vec_avg4
Pass vm_vec_negate v by reference
Pass vm_vec_mag v by const&
Pass vm_vec_mag_quick v by const&
Pass vm_vec_normalize v by &
Pass vm_vec_normalize_quick v by &
Pass vm_vec_zero v by &
Pass vm_transpose_matrix m by &
Pass vm_vec_scale dest by &
Pass vm_vec_scale2 dest by &
Pass vm_vec_add arguments by &
Pass vm_vec_sub arguments by &
Pass vm_vec_dot arguments by &
Detect writing excessive data from non-integers
Detect writing pointers
Remove vm_vec_dotprod -> vm_vec_dot redirect