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我想在新机器上设置Rails，并在尝试安装Ruby 1.9.3时遇到此错误。在新的Mac上安装Rails
$ rvm install 1.9.3 --with-gcc=clang
Checking requirements for osx.
Installing requirements for osx.
Updating system.....
Error running 'requirements_osx_brew_update_system ruby-1.9.3-p545',
showing last 15 lines of /Users/mitchelld/.rvm/log/1395835654_ruby-1.9.3-p545/update_system.log
https://github.com/mxcl/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.'
++ 1395835655.N /scripts/functions/logging : rvm_error() 1 > rvm_pretty_print stderr
++ 1395835655.N /scripts/functions/logging : rvm_pretty_print() 73 > case "${rvm_pretty_print_flag:=auto}" in
++ 1395835655.N /scripts/functions/logging : rvm_pretty_print() 78 > case "${TERM:-dumb}" in
++ 1395835655.N /scripts/functions/logging : rvm_pretty_print() 81 > case "$1" in
++ 1395835655.N /scripts/functions/logging : rvm_pretty_print() 11 > [[ -t 2 ]]
++ 1395835655.N /scripts/functions/logging : rvm_pretty_print() 11 > return 1
++ 1395835655.N /scripts/functions/logging : rvm_error() 45 > printf %b 'Failed to update Homebrew, follow instructions here:
https://github.com/mxcl/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.\n'
Failed to update Homebrew, follow instructions here:
https://github.com/mxcl/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.
++ 1395835655.N /scripts/functions/requirements/osx_brew : requirements_osx_brew_update_system() 3return 1
Requirements installation failed with status: 1.
我想关于Ruby 2.0.0
$ sudo gem install rails
Password:
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
checking for libkern/OSAtomic.h... yes
creating Makefile
make "DESTDIR=" clean
make "DESTDIR="
compiling atomic_reference.c
atomic_reference.c:57:59: warning: incompatible pointer types passing 'void **' to parameter of type 'volatile int64_t *' (aka 'volatile long long *') [-Wincompatible-pointer-types]
if (OSAtomicCompareAndSwap64(expect_value, new_value, &DATA_PTR(self))) {
^~~~~~~~~~~~~~~
/usr/include/libkern/OSAtomic.h:507:93: note: passing argument to parameter '__theValue' here
bool OSAtomicCompareAndSwap64(int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue);
^
1 warning generated.
linking shared-object atomic_reference.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line- argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [atomic_reference.bundle] Error 1
make failed, exit code 2
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/atomic-1.1.16 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/atomic-1.1.16/gem_make.out
安装Rails我已经尝试解除停止原子的宝石，并重新安装，我发现这是由的XCode 5.1时引起这个错误信息。
可能重复[红宝石宝石安装的Json对小牛和Xcode的5.1失败 - 未知的说法：“-multiply \ _definedsuppress”（http://stackoverflow.com/questions/22352838 /红宝石宝石安装 - JSON - 失败 - 对 - 小牛和 - xcode的-5-1-未知参数，MUL） – Nakilon