ap0calipse@ap0calipse:~/Desktop/openssl-0.9.8b$ ./Configure
Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-dso] [no-krb5] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--test-sanity] os/compiler[:flags]

pick os/compiler from:
BC-32 BS2000-OSD BSD-generic32 BSD-generic64 BSD-ia64 BSD-sparc64 BSD-sparcv8
BSD-x86 BSD-x86-elf BSD-x86_64 Cygwin Cygwin-pre1.3 DJGPP MPE/iX-gcc OS2-EMX
OS390-Unix ReliantUNIX SINIX SINIX-N UWIN VC-CE VC-NT VC-WIN32 VC-WIN64A
VC-WIN64I aix-cc aix-gcc aix3-cc aix64-cc aix64-gcc aux3-gcc bsdi-elf-gcc cc
cray-j90 cray-t3e darwin-i386-cc darwin-ppc-cc dgux-R3-gcc dgux-R4-gcc
dgux-R4-x86-gcc dist gcc hpux-cc hpux-gcc hpux-ia64-cc hpux-ia64-gcc
hpux-parisc-cc hpux-parisc-cc-o4 hpux-parisc-gcc hpux-parisc1_0-cc
hpux-parisc2-cc hpux-parisc2-gcc hpux64-ia64-cc hpux64-ia64-gcc
hpux64-parisc2-cc hpux64-parisc2-gcc hurd-x86 irix-cc irix-gcc irix-mips3-cc
irix-mips3-gcc irix64-mips4-cc irix64-mips4-gcc linux-alpha+bwx-ccc
linux-alpha+bwx-gcc linux-alpha-ccc linux-alpha-gcc linux-aout linux-elf
linux-generic32 linux-generic64 linux-ia32-icc linux-ia64 linux-ia64-ecc
linux-ia64-icc linux-ppc linux-ppc64 linux-sparcv8 linux-sparcv9 linux-x86_64
linux64-sparcv9 mingw ncr-scde netware-clib netware-libc netware-libc-bsdsock
netware-libc-gcc newsos4-gcc nextstep nextstep3.3 osf1-alpha-cc osf1-alpha-gcc
purify qnx4 qnx6 rhapsody-ppc-cc sco5-cc sco5-gcc solaris-sparcv7-cc
solaris-sparcv7-gcc solaris-sparcv8-cc solaris-sparcv8-gcc solaris-sparcv9-cc
solaris-sparcv9-gcc solaris-x86-cc solaris-x86-gcc solaris64-sparcv9-cc
solaris64-sparcv9-gcc solaris64-x86_64-cc solaris64-x86_64-gcc sunos-gcc
tandem-c89 tru64-alpha-cc ultrix-cc ultrix-gcc unixware-2.0 unixware-2.1
unixware-7 unixware-7-gcc vos-gcc vxworks-mipsle vxworks-ppc405 vxworks-ppc750
vxworks-ppc750-debug vxworks-ppc860 debug debug-BSD-x86-elf debug-Cygwin
debug-ben debug-ben-debug debug-ben-openbsd debug-ben-openbsd-debug
debug-ben-strict debug-bodo debug-darwin-ppc-cc debug-geoff
debug-levitte-linux-elf debug-levitte-linux-elf-extreme
debug-levitte-linux-noasm debug-levitte-linux-noasm-extreme debug-linux-elf
debug-linux-elf-noefence debug-linux-pentium debug-linux-ppro debug-rse
debug-solaris-sparcv8-cc debug-solaris-sparcv8-gcc debug-solaris-sparcv9-cc
debug-solaris-sparcv9-gcc debug-steve debug-steve-linux-pseudo64 debug-ulf
debug-vos-gcc

NOTE: If in doubt, on Unix-ish systems use './config'.