dlib_build/libdlib.a(thread_pool_extension.cpp.o): In function `dlib::thread_pool_implementation::thread() [clone .constprop.81]': thread_pool_extension.cpp:(.text+0x16d7): undefined reference to `vtable for dlib::mfp_kernel_1_base_class<0ul>::mp_impl_T<dlib::mfp_kernel_1_base_class<0ul>::mp_null<dlib::mfp_kernel_1_base_class<0ul>::dummy> >'[Bug]:

[lucasjinreal]

What Operating System(s) are you seeing this problem on?

Linux (aarch64)

dlib version

master

Python version

3.10

Compiler

7

Expected Behavior

dlib_build/libdlib.a(thread_pool_extension.cpp.o): In function dlib::thread_pool_implementation::thread() [clone .constprop.81]': thread_pool_extension.cpp:(.text+0x16d7): undefined reference tovtable for dlib::mfp_kernel_1_base_class<0ul>::mp_impl_T<dlib::mfp_kernel_1_base_class<0ul>::mp_null<dlib::mfp_kernel_1_base_class<0ul>::dummy> >'

Current Behavior

dlib_build/libdlib.a(thread_pool_extension.cpp.o): In function dlib::thread_pool_implementation::thread() [clone .constprop.81]': thread_pool_extension.cpp:(.text+0x16d7): undefined reference tovtable for dlib::mfp_kernel_1_base_class<0ul>::mp_impl_T<dlib::mfp_kernel_1_base_class<0ul>::mp_null<dlib::mfp_kernel_1_base_class<0ul>::dummy> >'

Steps to Reproduce

dlib_build/libdlib.a(thread_pool_extension.cpp.o): In function dlib::thread_pool_implementation::thread() [clone .constprop.81]': thread_pool_extension.cpp:(.text+0x16d7): undefined reference tovtable for dlib::mfp_kernel_1_base_class<0ul>::mp_impl_T<dlib::mfp_kernel_1_base_class<0ul>::mp_null<dlib::mfp_kernel_1_base_class<0ul>::dummy> >'

Anything else?

dlib_build/libdlib.a(thread_pool_extension.cpp.o): In function dlib::thread_pool_implementation::thread() [clone .constprop.81]': thread_pool_extension.cpp:(.text+0x16d7): undefined reference tovtable for dlib::mfp_kernel_1_base_class<0ul>::mp_impl_T<dlib::mfp_kernel_1_base_class<0ul>::mp_null<dlib::mfp_kernel_1_base_class<0ul>::dummy> >'

[dlib-issue-bot]

Warning: this issue has been inactive for 35 days and will be automatically closed on 2023-10-02 if there is no further activity.

If you are waiting for a response but haven't received one it's possible your question is somehow inappropriate. E.g. it is off topic, you didn't follow the issue submission instructions, or your question is easily answerable by reading the FAQ, dlib's official compilation instructions, dlib's API documentation, or a Google search.

[dlib-issue-bot]

Warning: this issue has been inactive for 42 days and will be automatically closed on 2023-10-02 if there is no further activity.

If you are waiting for a response but haven't received one it's possible your question is somehow inappropriate. E.g. it is off topic, you didn't follow the issue submission instructions, or your question is easily answerable by reading the FAQ, dlib's official compilation instructions, dlib's API documentation, or a Google search.

[dlib-issue-bot]

Notice: this issue has been closed because it has been inactive for 45 days. You may reopen this issue if it has been closed in error.

[jercylew]

I encountered the same error in CentOS 7, I resolve it by upgrading the gcc to 10

sudo yum install centos-release-scl
sudo yum install devtoolset-10-gcc*
scl enable devtoolset-10 bash

Now verify its version

which gcc
gcc --version

But I strongly suggest use the latest OS distribute, since CentOS 7 will retire soon