Merge pull request #9553 from apolcyn/fix_ruby_mac_build

ruby bundle install work around to build packages on mac
diff --git a/grpc.gemspec b/grpc.gemspec
index 3568515..48f7ed6 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -27,7 +27,7 @@
   s.require_paths = %w( src/ruby/bin src/ruby/lib src/ruby/pb )
   s.platform      = Gem::Platform::RUBY
 
-  s.add_dependency 'google-protobuf', '~> 3.1.0'
+  s.add_dependency 'google-protobuf', '~> 3.1'
   s.add_dependency 'googleauth',      '~> 0.5.1'
 
   s.add_development_dependency 'bundler',            '~> 1.9'
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 66c54aa..b379664 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -102,7 +102,6 @@
 $CFLAGS << ' -Wall '
 $CFLAGS << ' -Wextra '
 $CFLAGS << ' -pedantic '
-$CFLAGS << ' -Werror '
 $CFLAGS << ' -Wno-format '
 
 output = File.join('grpc', 'grpc_c')
diff --git a/templates/grpc.gemspec.template b/templates/grpc.gemspec.template
index 82fbb69..24446a3 100644
--- a/templates/grpc.gemspec.template
+++ b/templates/grpc.gemspec.template
@@ -29,7 +29,7 @@
     s.require_paths = %w( src/ruby/bin src/ruby/lib src/ruby/pb )
     s.platform      = Gem::Platform::RUBY
 
-    s.add_dependency 'google-protobuf', '~> 3.1.0'
+    s.add_dependency 'google-protobuf', '~> 3.1'
     s.add_dependency 'googleauth',      '~> 0.5.1'
 
     s.add_development_dependency 'bundler',            '~> 1.9'
diff --git a/tools/run_tests/artifacts/build_artifact_ruby.sh b/tools/run_tests/artifacts/build_artifact_ruby.sh
index 019efb0..ca461ba 100755
--- a/tools/run_tests/artifacts/build_artifact_ruby.sh
+++ b/tools/run_tests/artifacts/build_artifact_ruby.sh
@@ -52,7 +52,9 @@
 set +ex
 rvm use default
 gem install bundler --update
-bundle install
+
+tools/run_tests/helper_scripts/bundle_install_wrapper.sh
+
 set -ex
 
 rake gem:native
diff --git a/tools/run_tests/helper_scripts/bundle_install_wrapper.sh b/tools/run_tests/helper_scripts/bundle_install_wrapper.sh
new file mode 100755
index 0000000..d56afad
--- /dev/null
+++ b/tools/run_tests/helper_scripts/bundle_install_wrapper.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+# change to grpc repo root
+cd $(dirname $0)/../../..
+
+SYSTEM=`uname | cut -f 1 -d_`
+
+if [ "$SYSTEM" == "Darwin" ] ; then
+  # Workaround for crash during bundle install
+  # See suggestion in https://github.com/bundler/bundler/issues/3692
+  BUNDLE_SPECIFIC_PLATFORM=true bundle install
+else
+  bundle install
+fi
+
diff --git a/tools/run_tests/helper_scripts/pre_build_ruby.sh b/tools/run_tests/helper_scripts/pre_build_ruby.sh
index 56b58df..83647b5 100755
--- a/tools/run_tests/helper_scripts/pre_build_ruby.sh
+++ b/tools/run_tests/helper_scripts/pre_build_ruby.sh
@@ -36,4 +36,4 @@
 # change to grpc repo root
 cd $(dirname $0)/../../..
 
-bundle install
+tools/run_tests/helper_scripts/bundle_install_wrapper.sh