[root@localhost build_mod]# ./make.sh
ATI module generator V 2.0
==========================
initializing...
cat: /lib/modules/2.6.18-8.el5/build/include/linux/version-*.h: No such file or directory
cleaning...
patching 'highmem.h'...
assuming new VMA API since we do have kernel 2.6.x...
 Assuming default VMAP API
 Assuming default munmap API
doing Makefile based build for kernel 2.6.x and higher
make -C /lib/modules/2.6.18-8.el5/build SUBDIRS=/lib/modules/fglrx/build_mod/2.6.x modules
make[1]: Entering directory `/usr/src/kernels/2.6.18-8.el5-x86_64'
  CC [M]  /lib/modules/fglrx/build_mod/2.6.x/firegl_public.o
In file included from /lib/modules/fglrx/build_mod/2.6.x/drm_proc.h:41,
                 from /lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:333:
/lib/modules/fglrx/build_mod/2.6.x/drmP.h:126:1: warning: "DRM_DEBUG_CODE" redefined
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:177:1: warning: this is the location of the previous definition
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:451: warning: initialization from incompatible pointer type
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘firegl_stub_open’:
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:574: warning: assignment discards qualifiers from pointer target type
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘firegl_put_user_ptr’:
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:1352: warning: cast from pointer to integer of different size
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:1352: warning: cast from pointer to integer of different size
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:1352: warning: cast from pointer to integer of different size
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:1352: warning: cast from pointer to integer of different size
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘__ke_unregister_ioctl32_conversion’:
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:2616: warning: ‘return’ with a value, in function returning void
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘KAS_SlabCache_Initialize’:
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:4888: warning: cast from pointer to integer of different size
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘KAS_ExecuteAtLevel’:
/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:4706: warning: ‘flags’ may be used uninitialized in this function
  LD [M]  /lib/modules/fglrx/build_mod/2.6.x/fglrx.o
  Building modules, stage 2.
  MODPOST
WARNING: could not find /lib/modules/fglrx/build_mod/2.6.x/.libfglrx_ip.a.GCC4.cmd for /lib/modules/fglrx/build_mod/2.6.x/libfglrx_ip.a.GCC4
  CC      /lib/modules/fglrx/build_mod/2.6.x/fglrx.mod.o
  LD [M]  /lib/modules/fglrx/build_mod/2.6.x/fglrx.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.18-8.el5-x86_64'
build succeeded with return value 0
duplicating results into driver repository...
done.
==============================
You must change your working directory to /lib/modules/fglrx
and then call ./make_install.sh in order to install the built module.