*shell*

~ 
-> /usr/bin/irb
>> require 'rbconfig'
require 'rbconfig'
=> false
>> require 'pp'
require 'pp'
=> true
>> pp Config::CONFIG.to_a.sort
pp Config::CONFIG.to_a.sort
[["ALLOCA", ""],
 ["AR", "ar"],
 ["ARCHFILE", ""],
 ["ARCH_FLAG", ""],
 ["AS", "as"],
 ["ASFLAGS", ""],
 ["CC", "gcc"],
 ["CCDLFLAGS", " -fno-common"],
 ["CFLAGS",
  "-arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common  "],
 ["COMMON_HEADERS", ""],
 ["COMMON_LIBS", ""],
 ["COMMON_MACROS", ""],
 ["CP", "cp"],
 ["CPP", "gcc -E"],
 ["CPPFLAGS", " -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  "],
 ["CPPOUTFILE", "-o conftest.i"],
 ["DEFS", ""],
 ["DESTDIR", ""],
 ["DLDFLAGS", ""],
 ["DLDLIBS", ""],
 ["DLEXT", "bundle"],
 ["DLEXT2", ""],
 ["DLLWRAP", ""],
 ["ECHO_C", "\\\\c"],
 ["ECHO_N", ""],
 ["ECHO_T", ""],
 ["EGREP", "/usr/bin/grep -E"],
 ["ENABLE_SHARED", "yes"],
 ["EXEEXT", ""],
 ["EXPORT_PREFIX", ""],
 ["EXTOUT", ".ext"],
 ["EXTSTATIC", ""],
 ["GNU_LD", "no"],
 ["GREP", "/usr/bin/grep"],
 ["INSTALL", "/usr/bin/install -c"],
 ["INSTALL_DATA", "/usr/bin/install -c -m 644"],
 ["INSTALL_PROGRAM", "/usr/bin/install -c"],
 ["INSTALL_SCRIPT", "/usr/bin/install -c"],
 ["LDFLAGS", "-L. -arch i386 -arch x86_64 "],
 ["LDSHARED",
  "cc -arch i386 -arch x86_64 -pipe -bundle -undefined dynamic_lookup"],
 ["LIBEXT", "a"],
 ["LIBPATHENV", "DYLD_LIBRARY_PATH"],
 ["LIBPATHFLAG", " -L%s"],
 ["LIBRUBY", "libruby.1.dylib"],
 ["LIBRUBYARG", "-lruby"],
 ["LIBRUBYARG_SHARED", "-lruby"],
 ["LIBRUBYARG_STATIC", "-lruby"],
 ["LIBRUBY_A", "libruby-static.a"],
 ["LIBRUBY_ALIASES", "libruby.dylib"],
 ["LIBRUBY_DLDFLAGS",
  "-install_name /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/libruby.1.dylib -current_version 1.8.7 -compatibility_version 1.8"],
 ["LIBRUBY_LDSHARED", "cc -arch i386 -arch x86_64 -pipe -dynamiclib"],
 ["LIBRUBY_SO", "libruby.1.dylib"],
 ["LIBS", "-lpthread -ldl "],
 ["LINK_SO", ""],
 ["LN_S", "ln -s"],
 ["MAINLIBS", ""],
 ["MAJOR", "1"],
 ["MAKEDIRS", "mkdir -p"],
 ["MAKEFILES", "Makefile"],
 ["MANTYPE", "doc"],
 ["MINOR", "8"],
 ["NM", ""],
 ["NROFF", "/usr/bin/nroff"],
 ["OBJDUMP", ""],
 ["OBJEXT", "o"],
 ["OUTFLAG", "-o "],
 ["PACKAGE_BUGREPORT", ""],
 ["PACKAGE_NAME", ""],
 ["PACKAGE_STRING", ""],
 ["PACKAGE_TARNAME", ""],
 ["PACKAGE_VERSION", ""],
 ["PATH_SEPARATOR", ":"],
 ["PREP", "miniruby"],
 ["RANLIB", "ranlib"],
 ["RDOCTARGET", ""],
 ["RM", "rm -f"],
 ["RPATHFLAG", ""],
 ["RUBYW_INSTALL_NAME", ""],
 ["RUBY_INSTALL_NAME", "ruby"],
 ["RUBY_SO_NAME", "ruby"],
 ["SET_MAKE", ""],
 ["SHELL", "/bin/sh"],
 ["SOLIBS", ""],
 ["STATIC", ""],
 ["STRIP", "strip -A -n"],
 ["TEENY", "7"],
 ["TRY_LINK", ""],
 ["WINDRES", ""],
 ["YACC", "bison -y"],
 ["YFLAGS", ""],
 ["arch", "universal-darwin10.0"],
 ["archdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0"],
 ["bindir", "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin"],
 ["build", "i686-apple-darwin10.0"],
 ["build_alias", ""],
 ["build_cpu", "i686"],
 ["build_os", "darwin10.0"],
 ["build_vendor", "apple"],
 ["cflags", " "],
 ["configure_args",
  " '--prefix=/usr' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--disable-dependency-tracking' '--enable-pthread' '--enable-shared' '--prefix=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr' '--with-sitedir=/Library/Ruby/Site' 'ac_cv_func_getcontext=no' 'ac_cv_func_setcontext=no' 'CFLAGS=-arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE' 'LDFLAGS=-arch i386 -arch x86_64 '"],
 ["cppflags", ""],
 ["datadir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share"],
 ["datarootdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share"],
 ["debugflags", ""],
 ["docdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/doc/$(PACKAGE)"],
 ["dvidir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/doc/$(PACKAGE)"],
 ["exec_prefix", "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr"],
 ["host", "i686-apple-darwin10.0"],
 ["host_alias", ""],
 ["host_cpu", "i686"],
 ["host_os", "darwin10.0"],
 ["host_vendor", "apple"],
 ["htmldir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/doc/$(PACKAGE)"],
 ["includedir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include"],
 ["infodir", "/usr/share/info"],
 ["libdir", "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib"],
 ["libexecdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/libexec"],
 ["localedir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/locale"],
 ["localstatedir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/var"],
 ["mandir", "/usr/share/man"],
 ["oldincludedir", "/usr/include"],
 ["optflags", ""],
 ["pdfdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/doc/$(PACKAGE)"],
 ["prefix", "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr"],
 ["psdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/share/doc/$(PACKAGE)"],
 ["ruby_install_name", "ruby"],
 ["ruby_version", "1.8"],
 ["rubylibdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8"],
 ["rubyw_install_name", ""],
 ["sbindir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/sbin"],
 ["setup", "Setup"],
 ["sharedstatedir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/com"],
 ["sitearch", "universal-darwin10.0"],
 ["sitearchdir", "/Library/Ruby/Site/1.8/universal-darwin10.0"],
 ["sitedir", "/Library/Ruby/Site"],
 ["sitelibdir", "/Library/Ruby/Site/1.8"],
 ["sysconfdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/etc"],
 ["target", "i686-apple-darwin10.0"],
 ["target_alias", ""],
 ["target_cpu", "i686"],
 ["target_os", "darwin10.0"],
 ["target_vendor", "apple"],
 ["topdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0"],
 ["vendorarchdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8/universal-darwin10.0"],
 ["vendordir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby"],
 ["vendorlibdir",
  "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/vendor_ruby/1.8"]]
=> nil
>> Config::CONFIG.to_a["configure_args"]
Config::CONFIG.to_a["configure_args"]
TypeError: can't convert String into Integer
	from (irb):4:in `[]'
	from (irb):4
>> Config::CONFIG["configure_args"]
Config::CONFIG["configure_args"]
=> " '--prefix=/usr' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--disable-dependency-tracking' '--enable-pthread' '--enable-shared' '--prefix=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr' '--with-sitedir=/Library/Ruby/Site' 'ac_cv_func_getcontext=no' 'ac_cv_func_setcontext=no' 'CFLAGS=-arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE' 'LDFLAGS=-arch i386 -arch x86_64 '"
>>