GNU 工具链编译出来的 libbotan-2.a 形同虚设，无法用于静态链接

以我浅薄的理解 可能要在你当前的 gun 工具链下自行编译 libbotan.a 然后链接进去
大概率是 ld gcc 对不同内核 或者实现不兼容导致的？

用作者回复中给你的命令会报什么错？

@lixile 用当前工具链，自己编译出来的 libbotan.a 照样无法用于后续的静态链接，而且无论是 Linux 还是 NetBSD 都一样

@zoumouse 作者是回避 libbotan.a 的链接问题，给出的命令可以运行成功，编译出来的程序是使用动态库的版本，等于没回答

@cnbatch 方便提供一份使用 make V=1 产生的编译日志吗 我想研究一下

@cnbatch 加了-static 会报错么，感觉应该没问题的

简单看了下 issuse ，都是一堆"undefined reference"，我猜测应该是属于嵌套引用的问题

简单地说就是一个程序引用 udphop ，而 udphop 引用 botan2 这个库，你希望静态编译程序的时候，udphop 也是静态编译，然后 botan2 也是静态编译

问题在于，botan2 发布的时候，他并不知道你的编译参数。当某些参数不匹配的时候，它发布的.a 文件和你的程序就没法链接在一起。

我试过静态链接 mongodb ，而 mongodb 依赖 libsasl2 ，同样的官方发布的 libsasl2.a 文件是编译不过的，得自己下载 libsasl2 的源码，用相应的参数编译一个再重新链接就可以。

这个并不算 GNU 工具链的问题，VS 也是有这个问题的，比如有 mt 、md 模式的库，如果和你的程序不匹配，VS 一样链接不了

@lixile 由于 Log 太长，这里删掉了
/usr/include/botan-2/botan/sha3.h:15:13: warning: this header will be made internal in the future
15 | BOTAN_FUTURE_INTERNAL_HEADER(sha3.h)
| ^~~~~~~~~~~~~~~~~~~~~~~~
这样的警告，其他的都保留

$ make VERBOSE=1
/usr/bin/cmake -S/home/USERNAME/udphop -B/home/USERNAME/udphop/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/USERNAME/udphop/build/CMakeFiles /home/USERNAME/udphop/build//CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/USERNAME/udphop/build'
make -f src/shares/CMakeFiles/SHAREDEFINES.dir/build.make src/shares/CMakeFiles/SHAREDEFINES.dir/depend
make[2]: Entering directory '/home/USERNAME/udphop/build'
cd /home/USERNAME/udphop/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/USERNAME/udphop /home/USERNAME/udphop/src/shares /home/USERNAME/udphop/build /home/USERNAME/udphop/build/src/shares /home/USERNAME/udphop/build/src/shares/CMakeFiles/SHAREDEFINES.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/USERNAME/udphop/build'
make -f src/shares/CMakeFiles/SHAREDEFINES.dir/build.make src/shares/CMakeFiles/SHAREDEFINES.dir/build
make[2]: Entering directory '/home/USERNAME/udphop/build'
[ 11%] Building CXX object src/shares/CMakeFiles/SHAREDEFINES.dir/share_defines.cpp.o
cd /home/USERNAME/udphop/build/src/shares && /usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT src/shares/CMakeFiles/SHAREDEFINES.dir/share_defines.cpp.o -MF CMakeFiles/SHAREDEFINES.dir/share_defines.cpp.o.d -o CMakeFiles/SHAREDEFINES.dir/share_defines.cpp.o -c /home/USERNAME/udphop/src/shares/share_defines.cpp
[ 22%] Linking CXX static library libSHAREDEFINES.a
cd /home/USERNAME/udphop/build/src/shares && /usr/bin/cmake -P CMakeFiles/SHAREDEFINES.dir/cmake_clean_target.cmake
cd /home/USERNAME/udphop/build/src/shares && /usr/bin/cmake -E cmake_link_script CMakeFiles/SHAREDEFINES.dir/link.txt --verbose=1
/usr/bin/ar qc libSHAREDEFINES.a CMakeFiles/SHAREDEFINES.dir/share_defines.cpp.o
/usr/bin/ranlib libSHAREDEFINES.a
make[2]: Leaving directory '/home/USERNAME/udphop/build'
[ 22%] Built target SHAREDEFINES
make -f src/networks/CMakeFiles/NETCONNECTIONS.dir/build.make src/networks/CMakeFiles/NETCONNECTIONS.dir/depend
make[2]: Entering directory '/home/USERNAME/udphop/build'
cd /home/USERNAME/udphop/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/USERNAME/udphop /home/USERNAME/udphop/src/networks /home/USERNAME/udphop/build /home/USERNAME/udphop/build/src/networks /home/USERNAME/udphop/build/src/networks/CMakeFiles/NETCONNECTIONS.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/USERNAME/udphop/build'
make -f src/networks/CMakeFiles/NETCONNECTIONS.dir/build.make src/networks/CMakeFiles/NETCONNECTIONS.dir/build
make[2]: Entering directory '/home/USERNAME/udphop/build'
[ 33%] Building CXX object src/networks/CMakeFiles/NETCONNECTIONS.dir/connections.cpp.o
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT src/networks/CMakeFiles/NETCONNECTIONS.dir/connections.cpp.o -MF CMakeFiles/NETCONNECTIONS.dir/connections.cpp.o.d -o CMakeFiles/NETCONNECTIONS.dir/connections.cpp.o -c /home/USERNAME/udphop/src/networks/connections.cpp
[ 44%] Building CXX object src/networks/CMakeFiles/NETCONNECTIONS.dir/client.cpp.o
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT src/networks/CMakeFiles/NETCONNECTIONS.dir/client.cpp.o -MF CMakeFiles/NETCONNECTIONS.dir/client.cpp.o.d -o CMakeFiles/NETCONNECTIONS.dir/client.cpp.o -c /home/USERNAME/udphop/src/networks/client.cpp
[ 55%] Building CXX object src/networks/CMakeFiles/NETCONNECTIONS.dir/server.cpp.o
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT src/networks/CMakeFiles/NETCONNECTIONS.dir/server.cpp.o -MF CMakeFiles/NETCONNECTIONS.dir/server.cpp.o.d -o CMakeFiles/NETCONNECTIONS.dir/server.cpp.o -c /home/USERNAME/udphop/src/networks/server.cpp
[ 66%] Building CXX object src/networks/CMakeFiles/NETCONNECTIONS.dir/stun.cpp.o
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT src/networks/CMakeFiles/NETCONNECTIONS.dir/stun.cpp.o -MF CMakeFiles/NETCONNECTIONS.dir/stun.cpp.o.d -o CMakeFiles/NETCONNECTIONS.dir/stun.cpp.o -c /home/USERNAME/udphop/src/networks/stun.cpp
[ 77%] Linking CXX static library libNETCONNECTIONS.a
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/cmake -P CMakeFiles/NETCONNECTIONS.dir/cmake_clean_target.cmake
cd /home/USERNAME/udphop/build/src/networks && /usr/bin/cmake -E cmake_link_script CMakeFiles/NETCONNECTIONS.dir/link.txt --verbose=1
/usr/bin/ar qc libNETCONNECTIONS.a CMakeFiles/NETCONNECTIONS.dir/connections.cpp.o CMakeFiles/NETCONNECTIONS.dir/client.cpp.o CMakeFiles/NETCONNECTIONS.dir/server.cpp.o CMakeFiles/NETCONNECTIONS.dir/stun.cpp.o
/usr/bin/ranlib libNETCONNECTIONS.a
make[2]: Leaving directory '/home/USERNAME/udphop/build'
[ 77%] Built target NETCONNECTIONS
make -f CMakeFiles/udphop.dir/build.make CMakeFiles/udphop.dir/depend
make[2]: Entering directory '/home/USERNAME/udphop/build'
cd /home/USERNAME/udphop/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/USERNAME/udphop /home/USERNAME/udphop /home/USERNAME/udphop/build /home/USERNAME/udphop/build /home/USERNAME/udphop/build/CMakeFiles/udphop.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/USERNAME/udphop/build'
make -f CMakeFiles/udphop.dir/build.make CMakeFiles/udphop.dir/build
make[2]: Entering directory '/home/USERNAME/udphop/build'
[ 88%] Building CXX object CMakeFiles/udphop.dir/src/main.cpp.o
/usr/bin/c++ -I/usr/include/botan-2 -std=c++17 -MD -MT CMakeFiles/udphop.dir/src/main.cpp.o -MF CMakeFiles/udphop.dir/src/main.cpp.o.d -o CMakeFiles/udphop.dir/src/main.cpp.o -c /home/USERNAME/udphop/src/main.cpp

[100%] Linking CXX executable udphop
/usr/bin/cmake -E cmake_link_script CMakeFiles/udphop.dir/link.txt --verbose=1
/usr/bin/c++ CMakeFiles/udphop.dir/src/main.cpp.o -o udphop -lstdc++ -lbotan-2 src/shares/libSHAREDEFINES.a src/networks/libNETCONNECTIONS.a src/shares/libSHAREDEFINES.a
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): warning: relocation against `_ZTVN5Botan5SHA_3E' in read-only section `.text._ZN5Botan5SHA_3D2Ev[_ZN5Botan5SHA_3D5Ev]'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::SHA_3::~SHA_3()':
share_defines.cpp:(.text._ZN5Botan5SHA_3D2Ev[_ZN5Botan5SHA_3D5Ev]+0xf): undefined reference to `vtable for Botan::SHA_3'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::SHA_3_256::SHA_3_256()':
share_defines.cpp:(.text._ZN5Botan9SHA_3_256C2Ev[_ZN5Botan9SHA_3_256C5Ev]+0x19): undefined reference to `Botan::SHA_3::SHA_3(unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::SHA_3_384::SHA_3_384()':
share_defines.cpp:(.text._ZN5Botan9SHA_3_384C2Ev[_ZN5Botan9SHA_3_384C5Ev]+0x19): undefined reference to `Botan::SHA_3::SHA_3(unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `aes_256_gcm::set_key(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
share_defines.cpp:(.text._ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x1f0): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x2c6): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x372): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_gcm7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x410): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `aes_256_ocb::set_key(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
share_defines.cpp:(.text._ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x342): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x418): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x4c4): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: share_defines.cpp:(.text._ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN11aes_256_ocb7set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x562): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `chacha20::set_key(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
share_defines.cpp:(.text._ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x2f6): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x3cc): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x478): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: share_defines.cpp:(.text._ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN8chacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x516): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `xchacha20::set_key(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
share_defines.cpp:(.text._ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x23c): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x312): undefined reference to `Botan::AEAD_Mode::create(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Botan::Cipher_Dir, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/bin/ld: share_defines.cpp:(.text._ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x3be): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: share_defines.cpp:(.text._ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN9xchacha207set_keyERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x45c): undefined reference to `Botan::SymmetricAlgorithm::set_key(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::secure_allocator<unsigned char>::deallocate(unsigned char*, unsigned long)':
share_defines.cpp:(.text._ZN5Botan16secure_allocatorIhE10deallocateEPhm[_ZN5Botan16secure_allocatorIhE10deallocateEPhm]+0x28): undefined reference to `Botan::deallocate_memory(void*, unsigned long, unsigned long)'

/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::secure_allocator<unsigned char>::allocate(unsigned long)':
share_defines.cpp:(.text._ZN5Botan16secure_allocatorIhE8allocateEm[_ZN5Botan16secure_allocatorIhE8allocateEm]+0x1d): undefined reference to `Botan::allocate_memory(unsigned long, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o): in function `Botan::secure_allocator<unsigned long>::deallocate(unsigned long*, unsigned long)':
share_defines.cpp:(.text._ZN5Botan16secure_allocatorImE10deallocateEPmm[_ZN5Botan16secure_allocatorImE10deallocateEPmm]+0x28): undefined reference to `Botan::deallocate_memory(void*, unsigned long, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x28): undefined reference to `Botan::SHA_3::add_data(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x30): undefined reference to `Botan::SHA_3::final_result(unsigned char*)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x38): undefined reference to `Botan::SHA_3::clone() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x40): undefined reference to `Botan::SHA_3::provider[abi:cxx11]() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x48): undefined reference to `Botan::SHA_3::clear()'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x50): undefined reference to `Botan::SHA_3::name[abi:cxx11]() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_384E[_ZTVN5Botan9SHA_3_384E]+0x60): undefined reference to `Botan::SHA_3::copy_state() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x28): undefined reference to `Botan::SHA_3::add_data(unsigned char const*, unsigned long)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x30): undefined reference to `Botan::SHA_3::final_result(unsigned char*)'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x38): undefined reference to `Botan::SHA_3::clone() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x40): undefined reference to `Botan::SHA_3::provider[abi:cxx11]() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x48): undefined reference to `Botan::SHA_3::clear()'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x50): undefined reference to `Botan::SHA_3::name[abi:cxx11]() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTVN5Botan9SHA_3_256E[_ZTVN5Botan9SHA_3_256E]+0x60): undefined reference to `Botan::SHA_3::copy_state() const'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTIN5Botan9SHA_3_384E[_ZTIN5Botan9SHA_3_384E]+0x10): undefined reference to `typeinfo for Botan::SHA_3'
/usr/bin/ld: src/shares/libSHAREDEFINES.a(share_defines.cpp.o):(.data.rel.ro._ZTIN5Botan9SHA_3_256E[_ZTIN5Botan9SHA_3_256E]+0x10): undefined reference to `typeinfo for Botan::SHA_3'
/usr/bin/ld: warning: creating DT_TEXTREL in a PIE
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/udphop.dir/build.make:100: udphop] Error 1
make[2]: Leaving directory '/home/USERNAME/udphop/build'
make[1]: *** [CMakeFiles/Makefile2:134: CMakeFiles/udphop.dir/all] Error 2
make[1]: Leaving directory '/home/USERNAME/udphop/build'
make: *** [Makefile:91: all] Error 2

@zoumouse 就以我给 Botan 提 issue 时的测试代码为例
https://github.com/randombit/botan/issues/3085

即使加了 -static ，还是一样报错。

@changnet 十分奇怪的是，我自己编译 Botan 源码自己链接，还是不行（ Debian 11 和 Debian 最新测试版），但 alpine 用户可以。我按照 alpine 用户给出的经验操作去试，报错信息依然爆了一堆。

而同样都是 .a 静态编译，clang 工具链一下子就完成了，非常顺畅； VS 解决起来相对也是好一点，vcpkg 同样可以指定编译成动态库还是静态库，我是两种库都备好，这样就可以根据自己的设置选择正确的版本，选对了基本都能编译成功。

目前 clang 唯一不足的是对于 C++新标准的完善度相对较落后，其他方面我觉得比 GNU 好得多

额 你可能误解了 我是想看 Botan 的编译日志 而非链接失败的 udphop 编译
害

@lixile Log 太长，放在临时网盘了：
https://file.io/SSNkzdCvnASo

上面那个好像失效了，再放一个：
https://temp.sh/CAfSj/botan2.19.3.log

.a 创建 index 了么?还有连接是依赖顺序的，所以你得调整参数的顺序。动态库之所以没报错是因为允许未定义的符号然后在在运行时 ld 阶段处理。

@pagxir 首先可以肯定的是，botan 库在编译的时候已经附带 index 的选项，这是 Botan 自己生成的 makefile 开头：
CXX = g++
LINKER = $(CXX)
AR = ar
AR_OPTIONS = crs
PYTHON_EXE = /usr/bin/python3


为了简单起见，就以我给 Botan 作者贴出的 aes.cpp 做编译。

第一次，用 Debian 自带软件包管理器安装出来的 Botan：
c++ -lbotan-2 -I/usr/include/botan-2 -lstdc++ -lpthread aes.cpp
c++ -I/usr/include/botan-2 -lbotan-2 -lstdc++ -lpthread aes.cpp
c++ -I/usr/include/botan-2 -lstdc++ -lbotan-2 -lpthread aes.cpp
c++ -I/usr/include/botan-2 -lstdc++ -lpthread -lbotan-2 aes.cpp

c++ -static -lbotan-2 -I/usr/include/botan-2 -lstdc++ -lpthread aes.cpp
c++ -static -I/usr/include/botan-2 -lbotan-2 -lstdc++ -lpthread aes.cpp
c++ -static -I/usr/include/botan-2 -lstdc++ -lbotan-2 -lpthread aes.cpp
c++ -static -I/usr/include/botan-2 -lstdc++ -lpthread -lbotan-2 aes.cpp
c++ -static -I/usr/include/botan-2 -lstdc++ -lpthread aes.cpp -lbotan-2

以上命令全部失败，undefined reference 一堆。唯一成功的就是作者给出的命令
c++ -I/usr/include/botan-2 -lstdc++ -lpthread aes.cpp -lbotan-2
这样会编译出动态库版本，而不是静态库版本。

接着用我下载 Botan 源码手动编译的版本：
c++ -L:./lib/libbotan-2.a -I./include/botan-2 -lstdc++ -lpthread aes.cpp
c++ -I./include/botan-2 -L:./lib/libbotan-2.a -lstdc++ -lpthread aes.cpp
c++ -I./include/botan-2 -lstdc++ -L:./lib/libbotan-2.a -lpthread aes.cpp
c++ -I./include/botan-2 -lstdc++ -lpthread aes.cpp -L:./lib/libbotan-2.a

c++ -static -L:./lib/libbotan-2.a -I./include/botan-2 -lstdc++ -lpthread aes.cpp
c++ -static -I./include/botan-2 -L:./lib/libbotan-2.a -lstdc++ -lpthread aes.cpp
c++ -static -I./include/botan-2 -lstdc++ -L:./lib/libbotan-2.a -lpthread aes.cpp
c++ -static -I./include/botan-2 -lstdc++ -lpthread aes.cpp -L:./lib/libbotan-2.a

以上命令依旧全部失败，仍然还是 undefined reference 一大堆。

GCC 的版本：
$ c++ --version
c++ (Debian 10.2.1-6) 10.2.1 20210110
Copyright (C) 2020 Free Software Foundation, Inc.

Debian 10 、11 、最新的测试版，试了我很多次，都是一堆 undefined reference ，心累

调整顺序吧，把 stdcxx 那个挪最后。

我好像在 arch 上静态编译 aes.cpp 成功了
先安装 botan 发现没有 libbotan-2.a
然后下载源码并编译出 libbotan-2.a
然后执行
g++ -o aaa aes.cpp -I /usr/include/botan-2/ -L Botan-2.19.3 -lbotan-2 -static
就编译成功了......

g++ --version
g++ (GCC) 12.2.0

你的编译命令里面 -L 传的参数是 /lib/libbotan-2.a
但是 -L 命令应该传的参数是静态库的目录
所以如果你的静态库放在 /lib
应该是 -L /lib 吧？

@pagxir
@ec0

好了，这下搞清楚原因在哪了，确实是 GCC 的锅。
我在 Debian 测试版运行了一次 apt upgrade ，把所有能够更新的都更新一遍，其中就包括 GCC 。我记得应该有两个月没更新过了。

升级完成后，原本 GCC 10 会失败的命令
c++ aes.cpp -I./include/botan-2 -lstdc++ -L:./lib/ -lbotan-2 -static
在最新版 GCC 12.2.0-9 一次性成功

至于是什么 bug 就懒得查了。我只能说，GCC 真不是省油的灯。