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