Mac OS X安装native gem提示找不到 dyld_stub_binding_helper

在Mac OS X10.10下sudo gem install curses 返回如下错误：

apple@kissAir: ruby_src$sudo gem install curses

Password:

Fetching: curses-1.0.1.gem (100%)

Building native extensions.  This could take a while...

ERROR:  Error installing curses:

ERROR: Failed to build gem native extension.

/Users/apple/.rvm/rubies/ruby-2.1.3/bin/ruby extconf.rb

checking for tgetent() in -ltinfo... no

checking for tgetent() in -ltermcap... yes

checking for ncurses.h... yes

checking for initscr() in -lncursesw... no

checking for initscr() in -lncurses... yes

header: ncurses.h

library: ncurses

checking for beep()... yes

checking for bkgd()... yes

checking for bkgdset()... yes

checking for curs_set()... yes

checking for deleteln()... yes

checking for doupdate()... yes

checking for flash()... yes

checking for getbkgd()... yes

checking for getnstr()... yes

checking for init()... no

checking for init in ncurses.h... no

checking for isendwin()... yes

checking for keyname()... yes

checking for keypad()... yes

checking for resizeterm()... yes

checking for scrl()... yes

checking for set()... no

checking for set in ncurses.h... no

checking for setscrreg()... yes

checking for ungetch()... yes

checking for wattroff()... yes

checking for wattron()... yes

checking for wattrset()... yes

checking for wbkgd()... yes

checking for wbkgdset()... yes

checking for wdeleteln()... yes

checking for wgetnstr()... yes

checking for wresize()... yes

checking for wscrl()... yes

checking for wsetscrreg()... yes

checking for def_prog_mode()... yes

checking for reset_prog_mode()... yes

checking for timeout()... yes

checking for wtimeout()... yes

checking for nodelay()... yes

checking for init_color()... yes

checking for wcolor_set()... yes

checking for use_default_colors()... yes

checking for newpad()... yes

checking for ESCDELAY in ncurses.h... yes

checking for TABSIZE in ncurses.h... yes

checking for COLORS in ncurses.h... yes

checking for COLOR_PAIRS in ncurses.h... yes

checking for function curses_version in ncurses.h... yes

checking for variable curses_version in ncurses.h... no

creating Makefile

make "DESTDIR=" clean

make "DESTDIR="

compiling curses.c

linking shared-object curses.bundle

ld: warning: directory not found for option '-L/Users/mpapis/.sm/pkg/active/lib'

ld: symbol dyld_stub_binding_helper not found, normally in crt1.o/dylib1.o/bundle1.o for architecture x86_64

collect2: error: ld returned 1 exit status

make: *** [curses.bundle] Error 1

make failed, exit code 2

主要错误点是找不到符号dyld_stub_binding_helper，网上搜了一下，解决方法是将Xcode中的deployment target从低版本改为高版本，但我这个没用Xcode编译啊！想了一下，看上面编译器用的应该是gcc(4.9)，要不用clang试试看呐？！

apple@kissAir: ruby_src$type gcc

gcc is /opt/local/bin/gcc

apple@kissAir: ruby_src$ls -lh /opt/local/bin/gcc

lrwxr-xr-x  1 root  admin    39B 10 27 06:15 /opt/local/bin/gcc -> /usr/local/Cellar/gcc/4.9.1/bin/gcc-4.9

apple@kissAir: ruby_src$sudo mv /opt/local/bin/gcc old_gcc

Password:

apple@kissAir: ruby_src$type gcc

gcc is /usr/bin/gcc

apple@kissAir: ruby_src$gcc -v

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1

Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)

Target: x86_64-apple-darwin14.0.0

Thread model: posix

apple@kissAir: ruby_src$clang -v

Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)

Target: x86_64-apple-darwin14.0.0

Thread model: posix

现在gcc实际连接在clang上了，遂再次安装gem：

apple@kissAir: ruby_src$sudo gem install curses

Building native extensions.  This could take a while...

Successfully installed curses-1.0.1

Parsing documentation for curses-1.0.1

Installing ri documentation for curses-1.0.1

Done installing documentation for curses after 3 seconds

1 gem installed

哦鸟！看一下导出的符号：

nm /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin14/curses.bundle

U _COLORS

U _COLOR_PAIRS

U _COLS

U _ESCDELAY

0000000000000732 T _Init_curses

U _LINES

U _TABSIZE

U ___sprintf_chk

U ___stack_chk_fail

U ___stack_chk_guard

U _beep

U _can_change_color

U _cbreak

U _color_content

U _curs_set

U _curses_version

U _def_prog_mode

U _delwin

U _doupdate

U _echo

U _endwin

U _flash

U _getbegx

U _getbegy

U _getcurx

U _getcury

U _getmaxx

U _getmaxy

U _getmouse

U _has_colors

U _idlok

U _init_color

U _init_pair

U _initscr

U _isendwin

U _keyname

U _keypad

U _mouseinterval

U _mousemask

U _mvwin

U _newpad

U _newwin

U _nl

U _nocbreak

U _nodelay

U _noecho

U _nonl

U _noraw

U _pair_content

U _pnoutrefresh

U _prefresh

U _raw

U _rb_ary_new3

U _rb_block_given_p

U _rb_cData

U _rb_cFalseClass

U _rb_cFixnum

U _rb_cFloat

U _rb_cNilClass

U _rb_cObject

U _rb_cSymbol

U _rb_cTrueClass

U _rb_check_typeddata

U _rb_data_typed_object_alloc

U _rb_define_alloc_func

U _rb_define_class_under

U _rb_define_const

U _rb_define_method

U _rb_define_module

U _rb_define_module_function

U _rb_define_module_under

U _rb_eArgError

U _rb_eRuntimeError

U _rb_eSecurityError

U _rb_fix2int

U _rb_gc_register_address

U _rb_gc_unregister_address

U _rb_isprint

U _rb_locale_str_new

U _rb_locale_str_new_cstr

U _rb_num2int

U _rb_num2long

U _rb_num2uint

U _rb_obj_alloc

U _rb_obj_class

U _rb_raise

U _rb_safe_level

U _rb_scan_args

U _rb_secure

U _rb_set_end_proc

U _rb_str_export_locale

U _rb_str_new_cstr

U _rb_string_value

U _rb_string_value_cstr

U _rb_thread_call_without_gvl

U _rb_undef_method

U _rb_yield

U _reset_prog_mode

U _resizeterm

U _ruby_xfree

U _ruby_xmalloc

U _scrollok

U _start_color

U _stdscr

U _subwin

U _ungetch

U _ungetmouse

U _use_default_colors

U _waddch

U _waddnstr

U _wattr_off

U _wattr_on

U _wattrset

U _wbkgd

U _wbkgdset

U _wborder

U _wclear

U _wclrtoeol

U _wcolor_set

U _wdelch

U _wgetch

U _wgetnstr

U _winch

U _winsch

U _winsdelln

U _wmove

U _wnoutrefresh

U _wrefresh

U _wresize

U _wscrl

U _wsetscrreg

U _wtimeout

U dyld_stub_binder

最后把gcc连接给它还原本色吧：

apple@kissAir: ~$gcc -v

Using built-in specs.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/4.9.1/libexec/gcc/x86_64-apple-darwin14.0.0/4.9.1/lto-wrapper

Target: x86_64-apple-darwin14.0.0

Configured with: ../configure --build=x86_64-apple-darwin14.0.0 --prefix=/usr/local/Cellar/gcc/4.9.1 --enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-4.9 --with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr --with-mpc=/usr/local/opt/libmpc
--with-cloog=/usr/local/opt/cloog --with-isl=/usr/local/opt/isl --with-system-zlib --enable-version-specific-runtime-libs --enable-libstdcxx-time=yes --enable-stage1-checking --enable-checking=release --enable-lto --disable-werror --with-pkgversion='Homebrew
gcc 4.9.1' --with-bugurl=https://github.com/Homebrew/homebrew/issues --enable-plugin --disable-nls --enable-multilib

Thread model: posix

gcc version 4.9.1 (Homebrew gcc 4.9.1)

apple@kissAir: ~$