media/webrtc/trunk/build/mac/verify_no_objc.sh@6474c204b198 (annotated)
media/webrtc/trunk/build/mac/verify_no_objc.sh
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rwxr-xr-x
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #!/bin/bash |
| michael@0 | 2 | |
| michael@0 | 3 | # Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| michael@0 | 4 | # Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | # found in the LICENSE file. |
| michael@0 | 6 | |
| michael@0 | 7 | # This script makes sure that no __OBJC,__image_info section appears in the |
| michael@0 | 8 | # executable file built by the Xcode target that runs the script. If such a |
| michael@0 | 9 | # section appears, the script prints an error message and exits nonzero. |
| michael@0 | 10 | # |
| michael@0 | 11 | # Why is this important? |
| michael@0 | 12 | # |
| michael@0 | 13 | # On 10.5, there's a bug in CFBundlePreflightExecutable that causes it to |
| michael@0 | 14 | # crash when operating in an executable that has not loaded at its default |
| michael@0 | 15 | # address (that is, when it's a position-independent executable with the |
| michael@0 | 16 | # MH_PIE bit set in its mach_header) and the executable has an |
| michael@0 | 17 | # __OBJC,__image_info section. See http://crbug.com/88697. |
| michael@0 | 18 | # |
| michael@0 | 19 | # Chrome's main executables don't use any Objective-C at all, and don't need |
| michael@0 | 20 | # to carry this section around. Not linking them as Objective-C when they |
| michael@0 | 21 | # don't need it anyway saves about 4kB in the linked executable, although most |
| michael@0 | 22 | # of that 4kB is just filled with zeroes. |
| michael@0 | 23 | # |
| michael@0 | 24 | # This script makes sure that nobody goofs and accidentally introduces these |
| michael@0 | 25 | # sections into the main executables. |
| michael@0 | 26 | |
| michael@0 | 27 | set -eu |
| michael@0 | 28 | |
| michael@0 | 29 | otool="${DEVELOPER_BIN_DIR:-/usr/bin}/otool" |
| michael@0 | 30 | executable="${BUILT_PRODUCTS_DIR}/${EXECUTABLE_PATH}" |
| michael@0 | 31 | |
| michael@0 | 32 | if "${otool}" -arch i386 -o "${executable}" | grep -q '^Contents.*section$'; \ |
| michael@0 | 33 | then |
| michael@0 | 34 | echo "${0}: ${executable} has an __OBJC,__image_info section" 2>&1 |
| michael@0 | 35 | exit 1 |
| michael@0 | 36 | fi |
| michael@0 | 37 | |
| michael@0 | 38 | if [[ ${PIPESTATUS[0]} -ne 0 ]]; then |
| michael@0 | 39 | echo "${0}: otool failed" 2>&1 |
| michael@0 | 40 | exit 1 |
| michael@0 | 41 | fi |
| michael@0 | 42 | |
| michael@0 | 43 | exit 0 |
