为什么我在构建目录中新建的共享库与安装目录中的副本相比具有不同的依赖集？

Question

谁能告诉我为什么构建路径中的共享库与安装目录中的共享库具有不同的依赖集？

(base) ciaran@DESKTOP-K0APGUV:/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib$ pwd
/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib
(base) ciaran@DESKTOP-K0APGUV:/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib$ build_dir=/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib
(base) ciaran@DESKTOP-K0APGUV:/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib$ install_dir=/mnt/d/libOmexMeta/install-ubuntu/lib

(base) ciaran@DESKTOP-K0APGUV:/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib$ ldd -d $build_dir/libOmexMeta.so
        linux-vdso.so.1 (0x00007ffffd3fb000)
        libxml2.so.2 => /usr/lib/x86_64-linux-gnu/libxml2.so.2 (0x00007f417fb20000)
        libxslt.so.1 => /usr/lib/x86_64-linux-gnu/libxslt.so.1 (0x00007f417f8e3000)
        libsqlite3.so.0 => /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 (0x00007f417f5da000)
        libdb-5.3.so => /usr/lib/x86_64-linux-gnu/libdb-5.3.so (0x00007f417f231000)
        libpq.so.5 => /home/ciaran/vcpkg/installed/x64-linux/lib/libpq.so.5 (0x00007f417ed06000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f417eb02000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f417e72e000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f417e390000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f417e178000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f417dd87000)
        libicuuc.so.60 => /usr/lib/x86_64-linux-gnu/libicuuc.so.60 (0x00007f417d9cf000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f417d7b2000)
        liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f417d58c000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f417d36d000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f418089c000)
        libicudata.so.60 => /usr/lib/x86_64-linux-gnu/libicudata.so.60 (0x00007f417b7c4000)

与

相比

(base) ciaran@DESKTOP-K0APGUV:/mnt/d/libOmexMeta/cmake-build-release-wsl-ubuntu1804-gcc101/lib$ ldd -d $install_dir/libOmexMeta.so
        linux-vdso.so.1 (0x00007ffe5c1c7000)
        libxml2.so.2 => /usr/lib/x86_64-linux-gnu/libxml2.so.2 (0x00007fa93452b000)
        libxslt.so.1 => /usr/lib/x86_64-linux-gnu/libxslt.so.1 (0x00007fa9342ee000)
        libsqlite3.so.0 => /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 (0x00007fa933fe5000)
        libdb-5.3.so => /usr/lib/x86_64-linux-gnu/libdb-5.3.so (0x00007fa933c3c000)
        libpq.so.5 => /usr/lib/x86_64-linux-gnu/libpq.so.5 (0x00007fa9339ee000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fa9337ea000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fa933416000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fa933078000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fa932e60000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa932a6f000)
        libicuuc.so.60 => /usr/lib/x86_64-linux-gnu/libicuuc.so.60 (0x00007fa9326b7000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fa93249a000)
        liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007fa932274000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fa932055000)
        libssl.so.1.1 => /usr/lib/x86_64-linux-gnu/libssl.so.1.1 (0x00007fa931dc8000)
        libcrypto.so.1.1 => /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 (0x00007fa9318fd000)
        libgssapi_krb5.so.2 => /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007fa9316b2000)
        libldap_r-2.4.so.2 => /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 (0x00007fa931460000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fa9352a7000)
        libicudata.so.60 => /usr/lib/x86_64-linux-gnu/libicudata.so.60 (0x00007fa92f8b7000)
        libkrb5.so.3 => /usr/lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007fa92f5e1000)
        libk5crypto.so.3 => /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007fa92f3af000)
        libcom_err.so.2 => /lib/x86_64-linux-gnu/libcom_err.so.2 (0x00007fa92f1ab000)
        libkrb5support.so.0 => /usr/lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007fa92efa0000)
        liblber-2.4.so.2 => /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 (0x00007fa92ed92000)
        libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007fa92eb77000)
        libsasl2.so.2 => /usr/lib/x86_64-linux-gnu/libsasl2.so.2 (0x00007fa92e95c000)
        libgssapi.so.3 => /usr/lib/x86_64-linux-gnu/libgssapi.so.3 (0x00007fa92e71b000)
        libgnutls.so.30 => /usr/lib/x86_64-linux-gnu/libgnutls.so.30 (0x00007fa92e3b5000)
        libkeyutils.so.1 => /lib/x86_64-linux-gnu/libkeyutils.so.1 (0x00007fa92e1b1000)
        libheimntlm.so.0 => /usr/lib/x86_64-linux-gnu/libheimntlm.so.0 (0x00007fa92dfa8000)
        libkrb5.so.26 => /usr/lib/x86_64-linux-gnu/libkrb5.so.26 (0x00007fa92dd1b000)
        libasn1.so.8 => /usr/lib/x86_64-linux-gnu/libasn1.so.8 (0x00007fa92da79000)
        libhcrypto.so.4 => /usr/lib/x86_64-linux-gnu/libhcrypto.so.4 (0x00007fa92d843000)
        libroken.so.18 => /usr/lib/x86_64-linux-gnu/libroken.so.18 (0x00007fa92d62d000)
        libp11-kit.so.0 => /usr/lib/x86_64-linux-gnu/libp11-kit.so.0 (0x00007fa92d2fe000)
        libidn2.so.0 => /usr/lib/x86_64-linux-gnu/libidn2.so.0 (0x00007fa92d0e1000)
        libunistring.so.2 => /usr/lib/x86_64-linux-gnu/libunistring.so.2 (0x00007fa92cd63000)
        libtasn1.so.6 => /usr/lib/x86_64-linux-gnu/libtasn1.so.6 (0x00007fa92cb50000)
        libnettle.so.6 => /usr/lib/x86_64-linux-gnu/libnettle.so.6 (0x00007fa92c91a000)
        libhogweed.so.4 => /usr/lib/x86_64-linux-gnu/libhogweed.so.4 (0x00007fa92c6e6000)
        libgmp.so.10 => /usr/lib/x86_64-linux-gnu/libgmp.so.10 (0x00007fa92c465000)
        libwind.so.0 => /usr/lib/x86_64-linux-gnu/libwind.so.0 (0x00007fa92c23c000)
        libheimbase.so.1 => /usr/lib/x86_64-linux-gnu/libheimbase.so.1 (0x00007fa92c02d000)
        libhx509.so.5 => /usr/lib/x86_64-linux-gnu/libhx509.so.5 (0x00007fa92bde3000)
        libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007fa92bbab000)
        libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007fa92b9a3000)

这些是新构建的二进制文件，所以我不明白为什么它们不同。

Answer 1

当您运行 ldd 时，您不仅会看到您的直接依赖关系，还会看到您的依赖关系的间接依赖关系。您的共享库所依赖的库在两个不同的位置具有不同的依赖关系。

特别是，在一个位置它使用

解析libpq.so.5

libpq.so.5 => /home/ciaran/vcpkg/installed/x64-linux/lib/libpq.so.5

而另一个是

libpq.so.5 => /usr/lib/x86_64-linux-gnu/libpq.so.5

这又带来了不同的库集。

Answer 2

我同意 KamilCuk 的观点。

虽然两个文件同名，但它们可能不同。使用 md5sum 检查这个。

为避免 RPATH 副作用，请使用 ldd -r option。

为什么我在构建目录中新建的共享库与安装目录中的副本相比具有不同的依赖集？

Why does my newly built shared library in the build directory have a different set of dependencies compared to the copy in the install directory?

c++

linux

ubuntu

cmake

shared-libraries