4 # Copyright (C) 2009 Google Inc. All rights reserved.
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions are
10 # * Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # * Redistributions in binary form must reproduce the above
13 # copyright notice, this list of conditions and the following disclaimer
14 # in the documentation and/or other materials provided with the
16 # * Neither the name of Google Inc. nor the names of its
17 # contributors may be used to endorse or promote products derived from
18 # this software without specific prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 # usage: adjust_visibility.sh INPUT OUTPUT WORK_DIR
35 # Transforms a static library at INPUT by marking all of its symbols
36 # private_extern. The output is placed at OUTPUT. WORK_DIR is used as a
37 # scratch directory, which need not exist before this script is invoked,
38 # and which will be left behind when the script exits.
42 if [ $# -ne 3 ] ; then
43 echo "usage: ${0} INPUT OUTPUT WORK_DIR" >& 2
51 # Start with a clean slate.
54 mkdir -p "${WORK_DIR}"
56 # ar doesn't operate on fat files. Figure out what architectures are
58 ARCHS=$(file "${INPUT}" | sed -Ene 's/^.*\(for architecture (.+)\):.*$/\1/p')
59 if [ -z "${ARCHS}" ] ; then
63 OUTPUT_NAME="output.a"
65 for ARCH in ${ARCHS} ; do
66 # Get a thin version of fat input by running lipo. If the input is already
67 # thin, just copy it into place. The extra copy isn't strictly necessary
68 # but it simplifies the script.
69 ARCH_DIR="${WORK_DIR}/${ARCH}"
70 mkdir -p "${ARCH_DIR}"
72 ARCH_INPUT="${ARCH_DIR}/${INPUT_NAME}"
73 if [ "${ARCHS}" = "self" ] ; then
74 cp "${INPUT}" "${ARCH_INPUT}"
76 lipo -thin "${ARCH}" "${INPUT}" -output "${ARCH_INPUT}"
79 # Change directories to extract the archive to ensure correct pathnames.
80 (cd "${ARCH_DIR}" && ar -x "${INPUT_NAME}")
82 # libWebKitSystemInterfaceLeopard.a's cuDbUtils.o references a few symbols
83 # that are not defined in any framework in OS X 10.5. If it's linked into a
84 # libwebkit.dylib with -Wl,-all_load, linking to libwebkit.dylib will result
85 # in these unresolved symbols:
86 # __ZN8Security12KeychainCore6Schema22X509CrlSchemaIndexListE$non_lazy_ptr
87 # __ZN8Security12KeychainCore6Schema23X509CrlSchemaIndexCountE$non_lazy_ptr
88 # __ZN8Security12KeychainCore6Schema26X509CrlSchemaAttributeListE$non_lazy_ptr
89 # __ZN8Security12KeychainCore6Schema27X509CrlSchemaAttributeCountE$non_lazy_ptr
90 # Since nothing in cuDbUtils.o is needed, just remove it.
91 rm "${ARCH_DIR}"/cuDbUtils.o
93 # Use ld -r to relink each object that was in the archive. Providing an
94 # empty -exported_symbols_list will transform all symbols to private_extern;
95 # these symbols are retained with -keep_private_externs.
96 for OBJECT in "${ARCH_DIR}/"*.o ; do
97 NEW_OBJECT="${OBJECT}.new"
98 ld -o "${NEW_OBJECT}" -r "${OBJECT}" \
99 -exported_symbols_list /dev/null -keep_private_externs
100 mv "${NEW_OBJECT}" "${OBJECT}"
103 # Build an architecture-specific archive from the modified object files.
104 ARCH_OUTPUT="${ARCH_DIR}/${OUTPUT_NAME}"
105 (cd "${ARCH_DIR}" && ar -rc "${OUTPUT_NAME}" *.o)
106 ranlib "${ARCH_OUTPUT}"
108 # Toss the object files out now that they're in the archive.
109 rm -f "${ARCH_DIR}/"*.o
112 # Create a fat archive from the architecture-specific archives if needed.
113 # If the input was thin, leave the output thin by copying the only output
114 # archive to the destination.
115 if [ "${ARCHS}" = "self" ] ; then
116 cp "${WORK_DIR}/self/${OUTPUT_NAME}" "${OUTPUT}"
118 lipo -create -output "${OUTPUT}" "${WORK_DIR}/"*"/${OUTPUT_NAME}"