尽管设置了 rpath，但找不到一个 dll
Despite rpath is set, one dll is not found
ldd 找不到存在于 rpath 定义中的 dll。找到了其他一些库（检查/./../lib/*）
这里是ldd的输出（我们可以看到在../lib中找到了2个dll，但是没有libexpat.so.0:
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin#
ldd ./ade_admin linux-vdso.so.1 => (0x00007ffeb9796000)
libadeversion.so =>
/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libadeversion.so
(0x00007f31abaef000) libuuid.so.1 =>
/lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f31ab8ca000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007f31ab6ac000) libaprutil-1.so.0 =>
/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libaprutil-1.so.0
(0x00007f31ab58c000) libapr-1.so.0 =>
/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libapr-1.so.0
(0x00007f31ab460000) libavahi-client.so.3 =>
/usr/lib/x86_64-linux-gnu/libavahi-client.so.3 (0x00007f31ab24d000)
libavahi-common.so.3 =>
/usr/lib/x86_64-linux-gnu/libavahi-common.so.3 (0x00007f31ab041000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f31aae3d000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f31aaab5000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6
(0x00007f31aa7ac000) libgcc_s.so.1 =>
/lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f31aa595000) libc.so.6 =>
/lib/x86_64-linux-gnu/libc.so.6 (0x00007f31aa1cc000)
/lib64/ld-linux-x86-64.so.2 (0x0000560d30a76000) libexpat.so.0 =>
not found librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1
(0x00007f31a9fc4000) [...]
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin#
file ../lib/libexpat.so.0 ../lib/libexpat.so.0: ELF 64-bit LSB shared
object, x86-64, version 1 (SYSV), dynamically linked,
BuildID[sha1]=762de704943d03033d01a9725216d6b05d0740f5, not stripped
这里是 rpath:
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin#
readelf -d ade_admin | grep 'R.*PATH' 16: 0x000000000000001d (RUNPATH)
Library runpath: [${ORIGIN}/../lib]
现在致命的事实：它适用于 clang 3.8，但不适用于 gcc 6.3 (ubuntu 16.10)
显然添加 LD_LIBRARY_PATH=../lib 使其再次工作，但 rpath 的目标是避免设置它
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin#
export LD_LIBRARY_PATH=../lib
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin#
ldd ./ade_admin linux-vdso.so.1 => (0x00007ffea23b6000)
libadeversion.so => ../lib/libadeversion.so (0x00007f78c6474000)
libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1
(0x00007f78c624f000) libpthread.so.0 =>
/lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f78c6031000)
libaprutil-1.so.0 => ../lib/libaprutil-1.so.0 (0x00007f78c5f11000)
libapr-1.so.0 => ../lib/libapr-1.so.0 (0x00007f78c5de5000)
libavahi-client.so.3 =>
/usr/lib/x86_64-linux-gnu/libavahi-client.so.3 (0x00007f78c5bd2000)
libavahi-common.so.3 =>
/usr/lib/x86_64-linux-gnu/libavahi-common.so.3 (0x00007f78c59c6000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f78c57c2000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f78c543a000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6
(0x00007f78c5131000) libgcc_s.so.1 =>
/lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f78c4f1a000) libc.so.6 =>
/lib/x86_64-linux-gnu/libc.so.6 (0x00007f78c4b51000)
/lib64/ld-linux-x86-64.so.2 (0x0000559fdceab000) libexpat.so.0 =>
../lib/libexpat.so.0 (0x00007f78c492a000)
有什么想法吗？
此致
洛朗
我只是找到了解释：clang 放在 elf 二进制所有库的 [NEEDED] 部分（即使我自己没有明确包含的库，但被我包含的库的 [NEEDED] 部分引用
来自 gcc 的示例：
readelf -d my_prog
Dynamic section at offset 0x9cb548 contains 46 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libadeversion.so]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [libsqlite3.so]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libaprutil-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libavahi-client.so.3]
0x0000000000000001 (NEEDED) Shared library: [libavahi-common.so.3]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libaio.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [lib_adm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dict64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dbr64.so]
0x0000000000000001 (NEEDED) Shared library: [libstdc++.so.6]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000001d (RUNPATH) Library runpath: [${ORIGIN}/../lib/:$ORIGIN/../lib/:../lib/]
来自 clang:
readelf -d my_prog
Dynamic section at offset 0xa7bae8 contains 54 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libadeversion.so]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [libsqlite3.so]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libaprutil-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libexpat.so.0]
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libavahi-client.so.3]
0x0000000000000001 (NEEDED) Shared library: [libavahi-common.so.3]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libaio.so.1]
0x0000000000000001 (NEEDED) Shared library: [libcrypt.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [lib_adm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dict64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rpc64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_sql64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdbc64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_ncp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_cmp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_repfltr64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_expat64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_cncp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dbr64.so]
0x0000000000000001 (NEEDED) Shared library: [libstdc++.so.6]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000001d (RUNPATH) Library runpath: [${ORIGIN}/../lib/:$ORIGIN/../lib/:../lib/]
并且一个 dll 包含缺少的一个 libexpat：
readelf -d ../lib/libaprutil-1.so.0
Dynamic section at offset 0x1e698 contains 29 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: **[libexpat.so.0]**
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [libcrypt.so.1]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000e (SONAME) Library soname: [libaprutil-1.so.0]
但是 RUNPATH 只被二进制文件使用而不被 dll 使用（也可以有自己的 RUNPATH）。
2个解决方案：
- 在 libaprutil-1.so.0 中添加 RUNPATH 以强制包含来自“.”的库
- 在我的构建中明确添加所有缺失的 dll
希望对您有所帮助
ldd 找不到存在于 rpath 定义中的 dll。找到了其他一些库（检查/./../lib/*）
这里是ldd的输出（我们可以看到在../lib中找到了2个dll，但是没有libexpat.so.0:
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin# ldd ./ade_admin linux-vdso.so.1 => (0x00007ffeb9796000) libadeversion.so => /DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libadeversion.so (0x00007f31abaef000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f31ab8ca000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f31ab6ac000) libaprutil-1.so.0 => /DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libaprutil-1.so.0 (0x00007f31ab58c000) libapr-1.so.0 => /DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin/./../lib/libapr-1.so.0 (0x00007f31ab460000) libavahi-client.so.3 => /usr/lib/x86_64-linux-gnu/libavahi-client.so.3 (0x00007f31ab24d000) libavahi-common.so.3 => /usr/lib/x86_64-linux-gnu/libavahi-common.so.3 (0x00007f31ab041000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f31aae3d000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f31aaab5000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f31aa7ac000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f31aa595000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f31aa1cc000) /lib64/ld-linux-x86-64.so.2 (0x0000560d30a76000) libexpat.so.0 => not found librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f31a9fc4000) [...]
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin# file ../lib/libexpat.so.0 ../lib/libexpat.so.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=762de704943d03033d01a9725216d6b05d0740f5, not stripped
这里是 rpath:
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin# readelf -d ade_admin | grep 'R.*PATH' 16: 0x000000000000001d (RUNPATH) Library runpath: [${ORIGIN}/../lib]
现在致命的事实：它适用于 clang 3.8，但不适用于 gcc 6.3 (ubuntu 16.10)
显然添加 LD_LIBRARY_PATH=../lib 使其再次工作，但 rpath 的目标是避免设置它
root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin# export LD_LIBRARY_PATH=../lib root@hyperstream:/DT/local/ADE-trunk4/build-ADE-Desktop-Default/bin# ldd ./ade_admin linux-vdso.so.1 => (0x00007ffea23b6000) libadeversion.so => ../lib/libadeversion.so (0x00007f78c6474000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f78c624f000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f78c6031000) libaprutil-1.so.0 => ../lib/libaprutil-1.so.0 (0x00007f78c5f11000) libapr-1.so.0 => ../lib/libapr-1.so.0 (0x00007f78c5de5000) libavahi-client.so.3 => /usr/lib/x86_64-linux-gnu/libavahi-client.so.3 (0x00007f78c5bd2000) libavahi-common.so.3 => /usr/lib/x86_64-linux-gnu/libavahi-common.so.3 (0x00007f78c59c6000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f78c57c2000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f78c543a000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f78c5131000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f78c4f1a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f78c4b51000) /lib64/ld-linux-x86-64.so.2 (0x0000559fdceab000) libexpat.so.0 => ../lib/libexpat.so.0 (0x00007f78c492a000)
有什么想法吗？
此致
洛朗
我只是找到了解释：clang 放在 elf 二进制所有库的 [NEEDED] 部分（即使我自己没有明确包含的库，但被我包含的库的 [NEEDED] 部分引用
来自 gcc 的示例：
readelf -d my_prog
Dynamic section at offset 0x9cb548 contains 46 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libadeversion.so]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [libsqlite3.so]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libaprutil-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libavahi-client.so.3]
0x0000000000000001 (NEEDED) Shared library: [libavahi-common.so.3]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libaio.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [lib_adm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dict64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dbr64.so]
0x0000000000000001 (NEEDED) Shared library: [libstdc++.so.6]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000001d (RUNPATH) Library runpath: [${ORIGIN}/../lib/:$ORIGIN/../lib/:../lib/]
来自 clang:
readelf -d my_prog
Dynamic section at offset 0xa7bae8 contains 54 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libadeversion.so]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [libsqlite3.so]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libaprutil-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libexpat.so.0]
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libavahi-client.so.3]
0x0000000000000001 (NEEDED) Shared library: [libavahi-common.so.3]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libaio.so.1]
0x0000000000000001 (NEEDED) Shared library: [libcrypt.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [lib_adm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dict64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rpc64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_sql64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rdbc64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_rm64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_ncp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_cmp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_repfltr64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_expat64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_cncp64.so]
0x0000000000000001 (NEEDED) Shared library: [lib_dbr64.so]
0x0000000000000001 (NEEDED) Shared library: [libstdc++.so.6]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000001d (RUNPATH) Library runpath: [${ORIGIN}/../lib/:$ORIGIN/../lib/:../lib/]
并且一个 dll 包含缺少的一个 libexpat：
readelf -d ../lib/libaprutil-1.so.0
Dynamic section at offset 0x1e698 contains 29 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: **[libexpat.so.0]**
0x0000000000000001 (NEEDED) Shared library: [libapr-1.so.0]
0x0000000000000001 (NEEDED) Shared library: [libuuid.so.1]
0x0000000000000001 (NEEDED) Shared library: [librt.so.1]
0x0000000000000001 (NEEDED) Shared library: [libcrypt.so.1]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libdl.so.2]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000e (SONAME) Library soname: [libaprutil-1.so.0]
但是 RUNPATH 只被二进制文件使用而不被 dll 使用（也可以有自己的 RUNPATH）。
2个解决方案： - 在 libaprutil-1.so.0 中添加 RUNPATH 以强制包含来自“.”的库 - 在我的构建中明确添加所有缺失的 dll
希望对您有所帮助