LinuxQuestions.org - SecureDelete installation on Linux Suse 10.0

I just tried installing SecureDelete 3.1 on Linux Suse 10.0, but it failed. When I typed “make” on the terminal, I got the following messages. Could someone please tell me what it means and how to install SecureDelete successfully? Is there any later version of SecureDelete that I should be installing, although thc.org only offers this version.

Or is there any alternative software to wipe off free space on hard disk?

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gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -c sdel-lib.csdel-lib.c: In function âsdel_overwriteâ:
sdel-lib.c:173: warning: pointer targets in passing argument 1 of â__sdel_fill_bufâ differ in signedness
sdel-lib.c:175: warning: pointer targets in passing argument 1 of â__sdel_fill_bufâ differ in signedness
sdel-lib.c:200: warning: pointer targets in passing argument 1 of â__sdel_fill_bufâ differ in signedness
sdel-lib.c:209: warning: pointer targets in passing argument 1 of â__sdel_fill_bufâ differ in signedness
gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o srm srm.c sdel-lib.o
strip srm
gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o sfill sfill.c sdel-lib.o
strip sfill
gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o sswap sswap.c sdel-lib.o
strip sswap
gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -o smem smem.c sdel-lib.o
smem.c: In function âsmash_itâ:
smem.c:122: warning: pointer targets in passing argument 1 of â__sdel_fill_bufâ differ in signedness
strip smem
gcc -O2 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D__KERNEL__ -DMODULE -fomit-frame-pointer -fno-strict-aliasing -pipe -mpreferred-stack-boundary=2 -I/lib/modules/`uname -r`/build/include -c sdel-mod.c
sdel-mod.c:1: error: -mpreferred-stack-boundary=2 is not between 4 and 12
make: *** [sdel-mod.o] Error 1