OpenBSD support for yasm.

third_party/yasm/yasm_compile.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is an gyp include to use YASM for compiling assembly files.
 #
 # Files to be compiled with YASM should have an extension of .asm.
 #
 # There are two variables for this include:
 # yasm_flags : Pass additional flags into YASM.
@@ skipping 18 matching lines @@
     'yasm_flags': [],
 
     'conditions': [
       [ 'use_system_yasm==0', {
         'yasm_path': '<(PRODUCT_DIR)/yasm',
       }, {
         'yasm_path': '<!(which yasm)',
       }],
 
       # Define yasm_flags that pass into YASM.
-      [ 'OS=="linux" and target_arch=="ia32"', {
+      [ 'os_posix==1 and OS!="mac" and target_arch=="ia32"', {
         'yasm_flags': [
           '-felf32',
           '-m', 'x86',
         ],
       }],
-      [ 'OS=="linux" and target_arch=="x64"', {
+      [ 'os_posix==1 and OS!="mac" and target_arch=="x64"', {
         'yasm_flags': [
           '-DPIC',
           '-felf64',
           '-m', 'amd64',
         ],
       }],
       [ 'OS=="mac" and target_arch=="ia32"', {
         'yasm_flags': [
           '-fmacho32',
           '-m', 'x86',
@@ skipping 38 matching lines @@
         '<(yasm_path)',
         '<@(yasm_flags)',
         '-o', '<(yasm_output_path)/<(RULE_INPUT_ROOT).<(asm_obj_extension)',
         '<(RULE_INPUT_PATH)',
       ],
       'process_outputs_as_sources': 1,
       'message': 'Compile assemly <(RULE_INPUT_PATH).',
     },
   ],  # rules
 }