即使在庫路徑中也找不到共享對象文件

我正在嘗試從原始碼安裝 plexmediaplayer。這涉及編譯我已經完成並安裝在 /usr/local/lib 下的 libmpv.so.1

當我執行 plexmediaplayer 時，我收到以下錯誤：

$ plexmediaplayer 
plexmediaplayer: error while loading shared libraries: libmpv.so.1: cannot open shared object file: No such file or directory

ldconfig 正確找到庫：

$ ldconfig -v | grep libmpv
libmpv.so.1 -> libmpv.so.1.24.0

plexmiediaplayer 二進製文件上的 ldd 顯示 libmpv：

$ ldd plexmediaplayer | grep libmpv
libmpv.so.1 => /usr/local/lib/libmpv.so.1 (0x00007f2fe4f33000)

這是一個符號連結：

ls -l /usr/local/lib/libmpv.so.1
lrwxrwxrwx 1 root root 16 Feb  9 20:37 /usr/local/lib/libmpv.so.1 -> libmpv.so.1.24.0

共享對象和執行檔都是針對 x86_64 編譯的，並且可以由非 root 使用者嘗試執行 plexmediaplayer 讀取：

$ file /usr/local/lib/libmpv.so.1.24.0
/usr/local/lib/libmpv.so.1.24.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=855d9cbf952c76e3c0c1c1a162c4c94ea5a12b91, not stripped
$ file /usr/local/bin/plexmediaplayer 
/usr/local/bin/plexmediaplayer: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=dc92ac026c5ac7bc3e5554a591321de81a3f4576, not stripped

這些都與我的機器拱門相匹配：

$ uname -a
Linux hostname 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

在 plexmediaplayer 上執行 strace 會得到以下結果：

$ strace -o lotsalogs -ff -e trace=file plexmediaplayer
open("/opt/Qt5.8.0/5.8/gcc_64//lib/tls/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/opt/Qt5.8.0/5.8/gcc_64//lib/tls/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/opt/Qt5.8.0/5.8/gcc_64//lib/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/opt/Qt5.8.0/5.8/gcc_64//lib/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/local/lib/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied)
open("/lib/x86_64-linux-gnu/tls/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/tls/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/tls/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/tls/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/tls/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/tls/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/lib/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)

包括：

open("/usr/local/lib/libmpv.so.1", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied)

但通過符號連結對文件的權限是：

ls -l /usr/local/lib/libmpv.so.1.24.0 
-rwxr-xr-x 1 root root 27872856 Mar 22 22:17 /usr/local/lib/libmpv.so.1.24.0

任何想法為什麼我的二進製文件找不到這個？

編輯：我擦除了下的所有 libmpv 和下的/usr/local/libplexmediaplayer /usr/local/bin，並被源目錄刪除，然後在 VM 中並排重新安裝。虛擬機中的建構工作，我的主機上的那個沒有。我還在兩台機器上對 ld 進行了雜湊處理，並且（不出所料）它們匹配。

事實證明，我（糟糕？）幾個月前為 plexmediaplayer 配置了 apparmor，這導致更新和重新編譯時出現問題。

我能夠通過執行來解決這個問題sudo cp /usr/local/lib/libmpv*.so /usr/lib32

ldd plexmediaplayer顯示相同，儘管庫在那裡，但它們沒有工作。

引用自：https://unix.stackexchange.com/questions/353405