python-bcc works only if clang-libs Installed, fails with only clang16-libs Installed
vzhereb9 opened this issue · comments
This issue has been reproduced on RHEL 9.x and RHEL-based distributions such as Alma and Rocky 9.x, but it may be a common error across other distributions as well.
Installed Clang packages:
[root@localhost ~]# rpm -qa | grep clang
clang-resource-filesystem-16.0.6-1.el9.x86_64
clang16-resource-filesystem-16.0.6-6.el9.x86_64
clang16-libs-16.0.6-6.el9.x86_64
To reproduce and address the issue, follow these steps:
Attempt to install BCC and related packages:
[root@localhost ~]# yum install bcc bcc-tools python3-bcc
Last metadata expiration check: 0:28:52 ago on Thu 25 Apr 2024 11:08:28 AM MSK.
Dependencies resolved.
==================================================================================================================================================
Package Architecture Version Repository Size
==================================================================================================================================================
Installing:
bcc x86_64 0.26.0-4.el9 appstream 617 k
bcc-tools x86_64 0.26.0-4.el9 appstream 465 k
python3-bcc noarch 0.26.0-4.el9 appstream 92 k
Installing dependencies:
python3-netaddr noarch 0.8.0-5.el9 appstream 1.5 M
Transaction Summary
==================================================================================================================================================
Install 4 Packages
Total download size: 2.7 M
Installed size: 14 M
Is this ok [y/N]: y
Downloading Packages:
(1/4): bcc-tools-0.26.0-4.el9.x86_64.rpm 1.2 MB/s | 465 kB 00:00
(2/4): bcc-0.26.0-4.el9.x86_64.rpm 1.5 MB/s | 617 kB 00:00
(3/4): python3-netaddr-0.8.0-5.el9.noarch.rpm 3.2 MB/s | 1.5 MB 00:00
(4/4): python3-bcc-0.26.0-4.el9.noarch.rpm 1.0 MB/s | 92 kB 00:00
--------------------------------------------------------------------------------------------------------------------------------------------------
Total 3.1 MB/s | 2.7 MB 00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : python3-netaddr-0.8.0-5.el9.noarch 1/4
Installing : python3-bcc-0.26.0-4.el9.noarch 2/4
Installing : bcc-0.26.0-4.el9.x86_64 3/4
Installing : bcc-tools-0.26.0-4.el9.x86_64 4/4
Running scriptlet: bcc-tools-0.26.0-4.el9.x86_64 4/4
Verifying : python3-netaddr-0.8.0-5.el9.noarch 1/4
Verifying : bcc-tools-0.26.0-4.el9.x86_64 2/4
Verifying : bcc-0.26.0-4.el9.x86_64 3/4
Verifying : python3-bcc-0.26.0-4.el9.noarch 4/4
Installed:
bcc-0.26.0-4.el9.x86_64 bcc-tools-0.26.0-4.el9.x86_64 python3-bcc-0.26.0-4.el9.noarch python3-netaddr-0.8.0-5.el9.noarch
Complete!
Installation completed successfully
Try running Python and importing BCC:
[root@localhost ~]# python3
Python 3.9.16 (main, Dec 8 2022, 00:00:00)
[GCC 11.3.1 20221121 (Red Hat 11.3.1-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import bcc
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.9/site-packages/bcc/__init__.py", line 26, in <module>
from .libbcc import lib, bcc_symbol, bcc_symbol_option, bcc_stacktrace_build_id, _SYM_CB_TYPE
File "/usr/lib/python3.9/site-packages/bcc/libbcc.py", line 17, in <module>
lib = ct.CDLL("libbcc.so.0", use_errno=True)
File "/usr/lib64/python3.9/ctypes/__init__.py", line 374, in __init__
self._handle = _dlopen(self._name, mode)
OSError: libclang-cpp.so.16: cannot open shared object file: No such file or directory
>>>
Install clang-libs:
[root@localhost ~]# yum install clang-libs
Last metadata expiration check: 0:32:17 ago on Thu 25 Apr 2024 11:08:28 AM MSK.
Dependencies resolved.
==================================================================================================================================================
Package Architecture Version Repository Size
==================================================================================================================================================
Installing:
clang-libs x86_64 16.0.6-1.el9 appstream 22 M
Transaction Summary
==================================================================================================================================================
Install 1 Package
Total download size: 22 M
Installed size: 114 M
Is this ok [y/N]: y
Downloading Packages:
clang-libs-16.0.6-1.el9.x86_64.rpm 5.4 MB/s | 22 MB 00:04
--------------------------------------------------------------------------------------------------------------------------------------------------
Total 5.1 MB/s | 22 MB 00:04
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : clang-libs-16.0.6-1.el9.x86_64 1/1
Running scriptlet: clang-libs-16.0.6-1.el9.x86_64 1/1
Verifying : clang-libs-16.0.6-1.el9.x86_64 1/1
Installed:
clang-libs-16.0.6-1.el9.x86_64
Complete!
Installation completed successfully
After installing clang-libs, Python import BCC without any errors.
[root@localhost ~]# python3
Python 3.9.16 (main, Dec 8 2022, 00:00:00)
[GCC 11.3.1 20221121 (Red Hat 11.3.1-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import bcc
>>>
It's important to note that the issue likely stems from incorrect paths to libclang-cpp.so. For clang-libs, the correct path is /usr/lib64/libclang-cpp.so.16, while for clang16-libs, it's /usr/lib64/llvm16/lib/libclang-cpp.so.16. Therefore, it's necessary to identify and correct the incorrect path being used by BCC.