Cannot install pushmeup plugin - ruby

Question

I try to install pushmeup plugin for phonegap push notifications (ios).
When I run command sudo gem install pushmeup I get this error:
Building native extensions. This could take a while... ERROR: Error
installing pushmeup: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
extconf.rb creating Makefile
make "DESTDIR=" clean
make "DESTDIR=" compiling generator.c linking shared-object
json/ext/generator.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: * [generator.bundle] Error 1
make failed, exit code 2
Gem files will remain installed in
/Library/Ruby/Gems/2.0.0/gems/json-1.8.1 for inspection. Results
logged to
/Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/json-1.8.1/gem_make.out
GitHub:
https://github.com/phonegap-build/PushPlugin
Params:
ruby -v ruby 2.0.0p247 (2013-06-27 revision 41674)
[universal.x86_64-darwin13]
gem -v
2.2.2
Mac OS X v 10.9.2
XCode Version 5.1 (5B130a)
cordova -v
3.4.0-0.1.3

Answer 1

Apparently Apple broke something on Mavericks, they removed the warning flag unused-command-line-argument-hard-error-in-future acording to this issue: #528
Please try this command:
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future sudo gem install pushmeup
what it does? this sets the environment variable: ARCHFLAGS= this adds a ignore warnings -Wno-error= and this is the warning that you don't see in mavericks unused-command-line-argument-hard-error-in-future (which should be ignored)
In Apple documentation:
Compiler
As of Apple LLVM compiler version 5.1 (clang-502) and later, the
optimization level -O4 no longer implies link time optimization (LTO).
In order to build with LTO explicitly use the -flto option in addition
to the optimization level flag. (15633276) The Apple LLVM compiler in
Xcode 5.1 treats unrecognized command-line options as errors. This
issue has been seen when building both Python native extensions and
Ruby Gems, where some invalid compiler options are currently
specified. Projects using invalid compiler options will need to be
changed to remove those options. To help ease that transition, the
compiler will temporarily accept an option to downgrade the error to a
warning:
-Wno-error=unused-command-line-argument-hard-error-in-future
Note: This option will not be supported in the future. To workaround
this issue, set the ARCHFLAGS environment variable to downgrade the
error to a warning. For example, you can install a Python native
extension with:
$ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future
easy_install ExtensionName
Similarly, you can install a Ruby Gem with:
$ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future
gem install GemName 16214764 updated
EDIT HISTORY
just tested on my machine, using same ruby:
$ gem install pushmeup
Fetching: pushmeup-0.1.2.gem (100%)
Successfully installed pushmeup-0.1.2
Parsing documentation for pushmeup-0.1.2
Installing ri documentation for pushmeup-0.1.2
Done installing documentation for pushmeup after 1 seconds
1 gem installed
From what i saw you are not using rvm or rbenv so the problem is not in gcc dependencies
Accordingly to the output provided, the error was when installing json-1.8.1.
Can you post the log located at: /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/json-1.8.1/gem_make.out ?