Merge pull request #6396 from nicolasnoble/build-it-all-the-way-2

Always build the grpc library when building the ruby extension.

src/ruby/ext/grpc/extconf.rb

@@ -60,15 +60,8 @@ grpc_root = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
 
 grpc_config = ENV['GRPC_CONFIG'] || 'opt'
 
-if ENV.key?('GRPC_LIB_DIR')
-  grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
-else
-  grpc_lib_dir = File.join(grpc_root, 'libs', grpc_config)
-end
-
 ENV['MACOSX_DEPLOYMENT_TARGET'] = '10.7'
 
-unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a')) or windows
 ENV['AR'] = RbConfig::CONFIG['AR'] + ' rcs'
 ENV['CC'] = RbConfig::CONFIG['CC']
 ENV['LD'] = ENV['CC']
@@ -88,7 +81,6 @@ unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a')) or windows
 puts 'Building internal gRPC into ' + grpc_lib_dir
 system("make -j -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
 exit 1 unless $? == 0
-end
 
 $CFLAGS << ' -I' + File.join(grpc_root, 'include')
 $LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgrpc.a') unless windows