$ perl Configure.pl --help
Configure.pl - Parrot Configure 2.0

General Options:

   --help               Show this text
   --version            Show version information
   --verbose            Output extra information
   --verbose=2          Output every setting change
   --verbose-step       Comma-delimited string of configuration steps
                        for which output will be verbose
   --fatal              Failure of any configuration step will cause
                        Configure.pl to halt
   --fatal-step         Comma-delimited string of configuration steps
                        which upon failure cause Configure.pl to halt
   --silent             Don't be verbose, interactive or fatal
   --nomanicheck        Don't check the MANIFEST
   --languages="list of languages"
                        Specify a list of languages to process

   --ask                Have Configure ask for commonly-changed info
   --test=configure     Run tests of configuration tools before configuring
   --test=build         Run tests of build tools after configuring but before
                        calling 'make'
   --test               Run configuration tools tests, configure, then run
                        build tools tests


Compile Options:

   --debugging=0        Disable debugging, default = 1
   --inline             Compiler supports inline
   --optimize           Optimized compile
   --optimize=flags     Add given optimizer flags
   --parrot_is_shared   Link parrot dynamically
   --m=32               Build 32bit executable on 64-bit architecture.
   --profile            Turn on profiled compile (gcc only for now)
   --cage               [CAGE] compile includes many additional warnings

   --cc=(compiler)      Use the given compiler
   --ccflags=(flags)    Use the given compiler flags
   --ccwarn=(flags)     Use the given compiler warning flags
   --cxx=(compiler)     Use the given C++ compiler
   --libs=(libs)        Use the given libraries
   --link=(linker)      Use the given linker
   --linkflags=(flags)  Use the given linker flags
   --ld=(linker)        Use the given loader for shared libraries
   --ldflags=(flags)    Use the given loader flags for shared libraries
   --lex=(lexer)        Use the given lexical analyzer generator
   --make=(make tool)   Use the given make utility
   --yacc=(parser)      Use the given parser generator

   --define=inet_aton   Quick hack to use inet_aton instead of inet_pton

Parrot Options:

   --intval=(type)      Use the given type for INTVAL
   --floatval=(type)    Use the given type for FLOATVAL
   --opcode=(type)      Use the given type for opcodes
   --ops=(files)        Use the given ops files

   --cgoto=0            Don't build cgoto core - recommended when short of mem
   --jitcapable         Use JIT
   --execcapable        Use JIT to emit a native executable
   --gc=(type)          Determine the type of garbage collection
                        type=(gc|libc|malloc|malloc-trace) default is gc

External Library Options:

   --without-crypto     Build parrot without crypto support (libssl)
   --without-gdbm       Build parrot without GDBM support
   --without-gettext    Build parrot without gettext support
   --without-gmp        Build parrot without GMP support
   --without-opengl     Build parrot without OpenGL support (GL/GLU/GLUT)
   --without-pcre       Build parrot without pcre support

ICU Options:

   For using a system ICU, these options can be used:

   --icu-config=/path/to/icu-config
                        Location of the script used for ICU autodetection.
                        You just need to specify this option if icu-config
                        is not in your PATH.

   --icu-config=none    Can be used to disable the autodetection feature.
                        It will also be disabled if you specify any other
                        of the following ICU options.

   If you do not have a full ICU installation:

   --without-icu        Build parrot without ICU support
   --icuheaders=(path)  Location of ICU headers without /unicode
   --icushared=(flags)  Full linker command to create shared libraries

Other Options (may not be implemented):

   --maintainer         Create imcc's parser and lexer files. Needs a working
                        parser and lexer.

Install Options:

    --prefix=PREFIX         Install architecture-independent files in PREFIX
                            [/usr/local]
    --exec-prefix=EPREFIX   Install architecture-dependent files in EPREFIX
                            [PREFIX]

    By default, `make install' will install all the files in
    `/usr/local/bin', `/usr/local/lib' etc.  You can specify
    an installation prefix other than `/usr/local' using `--prefix',
    for instance `--prefix=$HOME'.

    For better control, use the options below.

    Fine tuning of the installation directories:
    --bindir=DIR          user executables [EPREFIX/bin]
    --sbindir=DIR         system admin executables [EPREFIX/sbin]
    --libexecdir=DIR      program executables [EPREFIX/libexec]
    --datadir=DIR         read-only architecture-independent data [PREFIX/share]
    --sysconfdir=DIR      read-only single-machine data [PREFIX/etc]
    --sharedstatedir=DIR  modifiable architecture-independent data [PREFIX/com]
    --localstatedir=DIR   modifiable single-machine data [PREFIX/var]
    --libdir=DIR          object code libraries [EPREFIX/lib]
    --includedir=DIR      C header files [PREFIX/include]
    --oldincludedir=DIR   C header files for non-gcc [/usr/include]
    --infodir=DIR         info documentation [PREFIX/info]
    --mandir=DIR          man documentation [PREFIX/man]