lddは依存関係の依存関係も示していますか？

Question

Lddが予期しない依存関係とlibicuuc（ "icu"から）を示すバイナリがあります。

#ldd A [...] libxml2.so.2 => /usr/lib64/libxml2.so.2 (0x00007faaf9722000) libicuuc.so.49 => /usr/lib64/libicuuc.so.49 (0x00007faaf5689000)

このシステムでは、libxmlはlibicuucに動的に依存しているため、lddが意図的にそれを見つけてしまうことは理にかなっていますが、libicuucはAのldd出力にも表示されると予想されますか？依存関係の依存関係としてリンクされているライブラリのみを取得するコマンドはありますか？

Maxim Egorushkin · Accepted Answer

lddは、アプリケーションの起動時または共有ライブラリのロード時にロードする必要があるすべてのライブラリを表示します。

readelf -dは、バイナリの直接の依存関係のみを示します。

$ readelf -d /opt/google/chrome/chrome | grep NEEDED 0x0000000000000001 (NEEDED) Shared library: [libX11.so.6] 0x0000000000000001 (NEEDED) Shared library: [libXrandr.so.2] 0x0000000000000001 (NEEDED) Shared library: [libXrender.so.1] 0x0000000000000001 (NEEDED) Shared library: [libXss.so.1] 0x0000000000000001 (NEEDED) Shared library: [libXext.so.6] 0x0000000000000001 (NEEDED) Shared library: [librt.so.1] 0x0000000000000001 (NEEDED) Shared library: [libdl.so.2] 0x0000000000000001 (NEEDED) Shared library: [libgobject-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libgthread-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libglib-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libgtk-x11-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libgdk-x11-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libatk-1.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libgdk_pixbuf-2.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libpangocairo-1.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libcairo.so.2] 0x0000000000000001 (NEEDED) Shared library: [libpango-1.0.so.0] 0x0000000000000001 (NEEDED) Shared library: [libfreetype.so.6] 0x0000000000000001 (NEEDED) Shared library: [libfontconfig.so.1] 0x0000000000000001 (NEEDED) Shared library: [libnss3.so] 0x0000000000000001 (NEEDED) Shared library: [libnssutil3.so] 0x0000000000000001 (NEEDED) Shared library: [libsmime3.so] 0x0000000000000001 (NEEDED) Shared library: [libplc4.so] 0x0000000000000001 (NEEDED) Shared library: [libnspr4.so] 0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0] 0x0000000000000001 (NEEDED) Shared library: [libgconf-2.so.4] 0x0000000000000001 (NEEDED) Shared library: [libdbus-1.so.3] 0x0000000000000001 (NEEDED) Shared library: [libXcomposite.so.1] 0x0000000000000001 (NEEDED) Shared library: [libasound.so.2] 0x0000000000000001 (NEEDED) Shared library: [libXfixes.so.3] 0x0000000000000001 (NEEDED) Shared library: [libcups.so.2] 0x0000000000000001 (NEEDED) Shared library: [libgcrypt.so.11] 0x0000000000000001 (NEEDED) Shared library: [libbz2.so.1.0] 0x0000000000000001 (NEEDED) Shared library: [libexpat.so.1] 0x0000000000000001 (NEEDED) Shared library: [libudev.so.0] 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] 0x0000000000000001 (NEEDED) Shared library: [ld-linux-x86-64.so.2] $ ldd /opt/google/chrome/chrome linux-vdso.so.1 => (0x00007fff9d3ff000) libX11.so.6 => /lib64/libX11.so.6 (0x00007f93186dc000) libXrandr.so.2 => /lib64/libXrandr.so.2 (0x00007f93184d3000) libXrender.so.1 => /lib64/libXrender.so.1 (0x00007f93182c9000) libXss.so.1 => /lib64/libXss.so.1 (0x00007f93180c5000) libXext.so.6 => /lib64/libXext.so.6 (0x00007f9317eb2000) librt.so.1 => /lib64/librt.so.1 (0x00007f9317caa000) libdl.so.2 => /lib64/libdl.so.2 (0x00007f9317aa6000) libgobject-2.0.so.0 => /lib64/libgobject-2.0.so.0 (0x00007f9317858000) libgthread-2.0.so.0 => /lib64/libgthread-2.0.so.0 (0x00007f9317656000) libglib-2.0.so.0 => /lib64/libglib-2.0.so.0 (0x00007f9317336000) libgtk-x11-2.0.so.0 => /lib64/libgtk-x11-2.0.so.0 (0x00007f9316cbf000) libgdk-x11-2.0.so.0 => /lib64/libgdk-x11-2.0.so.0 (0x00007f9316a00000) libatk-1.0.so.0 => /lib64/libatk-1.0.so.0 (0x00007f93167de000) libgdk_pixbuf-2.0.so.0 => /lib64/libgdk_pixbuf-2.0.so.0 (0x00007f93165bb000) libpangocairo-1.0.so.0 => /lib64/libpangocairo-1.0.so.0 (0x00007f93163ae000) libcairo.so.2 => /lib64/libcairo.so.2 (0x00007f9316103000) libpango-1.0.so.0 => /lib64/libpango-1.0.so.0 (0x00007f9315eb7000) libfreetype.so.6 => /usr/lib64/freetype-freeworld/libfreetype.so.6 (0x00007f9315c15000) libfontconfig.so.1 => /lib64/libfontconfig.so.1 (0x00007f93159e0000) libnss3.so => /lib64/libnss3.so (0x00007f93156a4000) libnssutil3.so => /lib64/libnssutil3.so (0x00007f9315479000) libsmime3.so => /lib64/libsmime3.so (0x00007f931524c000) libplc4.so => /lib64/libplc4.so (0x00007f9315046000) libnspr4.so => /lib64/libnspr4.so (0x00007f9314e09000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f9314bed000) libgconf-2.so.4 => /lib64/libgconf-2.so.4 (0x00007f93149bc000) libdbus-1.so.3 => /lib64/libdbus-1.so.3 (0x00007f9314778000) libXcomposite.so.1 => /lib64/libXcomposite.so.1 (0x00007f9314575000) libasound.so.2 => /lib64/libasound.so.2 (0x00007f9314294000) libXfixes.so.3 => /lib64/libXfixes.so.3 (0x00007f931408e000) libcups.so.2 => /lib64/libcups.so.2 (0x00007f9313e33000) libgcrypt.so.11 => /lib64/libgcrypt.so.11 (0x00007f9313bba000) libbz2.so.1.0 => not found libexpat.so.1 => /lib64/libexpat.so.1 (0x00007f9313991000) libudev.so.0 => /lib64/libudev.so.0 (0x00007f9313782000) libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f931347f000) libm.so.6 => /lib64/libm.so.6 (0x00007f9313184000) libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f9312f6e000) libc.so.6 => /lib64/libc.so.6 (0x00007f9312bb7000) /lib64/ld-linux-x86-64.so.2 (0x0000003c7a000000) libxcb.so.1 => /lib64/libxcb.so.1 (0x00007f9312999000) libffi.so.5 => /lib64/libffi.so.5 (0x00007f9312790000) libgmodule-2.0.so.0 => /lib64/libgmodule-2.0.so.0 (0x00007f931258c000) libgio-2.0.so.0 => /lib64/libgio-2.0.so.0 (0x00007f931223f000) libpangoft2-1.0.so.0 => /lib64/libpangoft2-1.0.so.0 (0x00007f9312012000) libXinerama.so.1 => /lib64/libXinerama.so.1 (0x00007f9311e0f000) libXi.so.6 => /lib64/libXi.so.6 (0x00007f9311c00000) libXcursor.so.1 => /lib64/libXcursor.so.1 (0x00007f93119f4000) libXdamage.so.1 => /lib64/libXdamage.so.1 (0x00007f93117f1000) libpng15.so.15 => /lib64/libpng15.so.15 (0x00007f93115c7000) libpixman-1.so.0 => /lib64/libpixman-1.so.0 (0x00007f9311340000) libz.so.1 => /lib64/libz.so.1 (0x00007f9311129000) libplds4.so => /lib64/libplds4.so (0x00007f9310f24000) libdbus-glib-1.so.2 => /lib64/libdbus-glib-1.so.2 (0x00007f9310cfd000) libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x00007f9310ab8000) libkrb5.so.3 => /lib64/libkrb5.so.3 (0x00007f93107d3000) libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x00007f93105a8000) libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00007f93103a3000) libgnutls.so.26 => /lib64/libgnutls.so.26 (0x00007f93100eb000) libgpg-error.so.0 => /lib64/libgpg-error.so.0 (0x00007f930fee7000) libavahi-common.so.3 => /lib64/libavahi-common.so.3 (0x00007f930fcd9000) libavahi-client.so.3 => /lib64/libavahi-client.so.3 (0x00007f930fac8000) libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007f930f891000) libXau.so.6 => /lib64/libXau.so.6 (0x00007f930f68c000) libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f930f46b000) libresolv.so.2 => /lib64/libresolv.so.2 (0x00007f930f251000) libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x00007f930f046000) libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00007f930ee42000) libtasn1.so.3 => /lib64/libtasn1.so.3 (0x00007f930ec31000) libp11-kit.so.0 => /lib64/libp11-kit.so.0 (0x00007f930ea1e000) libfreebl3.so => /lib64/libfreebl3.so (0x00007f930e7b3000)

依存関係の依存関係としてリンクされているライブラリのみを取得するコマンドはありますか？

ldd出力とreadelf -d出力の差を設定できます。