Compile bug: C++ One Definition Rule [-Wodr] violations in common/json.hpp

[srcshelton]

Git commit

llama.cpp bundled with ollama-0.5.11: https://github.com/ollama/ollama/tree/v0.5.11/llama/llama.cpp… which I think is 8962422 (from ollama/ollama@5e2653f)

Operating systems

Linux

GGML backends

CPU

Problem description & steps to reproduce

llama.cpp (as part of ollama) compiles successfully, but generates the following warnings with gcc-14.2:

* QA Notice: Package triggers severe warnings which indicate that it may exhibit random runtime failures.
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:19726:11: warning: type 'union json_value' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:23492:12: warning: type 'struct data' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:19400:7: warning: type 'struct basic_json' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json-schema-to-grammar.h:8:13: warning: 'json_schema_to_grammar' violates the C++ One Definition Rule [-Wodr]

First Bad Commit

No response

Compile command

ninja -j6 -l0

Relevant log output

* QA Notice: Package triggers severe warnings which indicate that it may exhibit random runtime failures.
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:19726:11: warning: type 'union json_value' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:23492:12: warning: type 'struct data' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json.hpp:19400:7: warning: type 'struct basic_json' violates the C++ One Definition Rule [-Wodr]
 * ollama-0.5.11/llama/llama.cpp/common/json-schema-to-grammar.h:8:13: warning: 'json_schema_to_grammar' violates the C++ One Definition Rule [-Wodr]

[srcshelton]

Origially ollama/ollama#9117, may relate to nlohmann/json#4116.

[srcshelton]

More detailed build output:

# github.com/ollama/ollama
ollama-0.5.11/llama/llama.cpp/common/json.hpp:19726:11: warning: type 'union json_value' violates the C++ One Definition Rule [-Wodr]
19726 |     union json_value
      |           ^
llama/llama.cpp/common/json.hpp:19726:11: note: a different type is defined in another translation unit
19726 |     union json_value
      |           ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:19729:19: note: the first difference of corresponding definitions is field 'object'
19729 |         object_t* object;
      |                   ^
llama/llama.cpp/common/json.hpp:19729:19: note: a field of same name but different type is defined in another translation unit
19729 |         object_t* object;
      |                   ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:19726:11: note: type name 'nlohmann::json_abi_v3_11_3::ordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::json_abi_v3_11_3::basic_json<nlohmann::json_abi_v3_11_3::ordered_map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::json_abi_v3_11_3::adl_serializer, std::vector<unsigned char, std::allocator<unsigned char> >, void>, std::less<void>, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, nlohmann::json_abi_v3_11_3::basic_json<nlohmann::json_abi_v3_11_3::ordered_map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::json_abi_v3_11_3::adl_serializer, std::vector<unsigned char, std::allocator<unsigned char> >, void> > > >' should match type name 'nlohmann::json_abi_v3_11_3::ordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::json_abi_v3_11_3::basic_json<nlohmann::json_abi_v3_11_3::ordered_map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::json_abi_v3_11_3::adl_serializer, std::vector<unsigned char, std::allocator<unsigned char> >, void>, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, nlohmann::json_abi_v3_11_3::basic_json<nlohmann::json_abi_v3_11_3::ordered_map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::json_abi_v3_11_3::adl_serializer, std::vector<unsigned char, std::allocator<unsigned char> >, void> > > >'
19726 |     union json_value
      |           ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:23492:12: warning: type 'struct data' violates the C++ One Definition Rule [-Wodr]
23492 |     struct data
      |            ^
llama/llama.cpp/common/json.hpp:23492:12: note: a different type is defined in another translation unit
23492 |     struct data
      |            ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:23498:20: note: the first difference of corresponding definitions is field 'm_value'
23498 |         json_value m_value = {};
      |                    ^
llama/llama.cpp/common/json.hpp:23498:20: note: a field of same name but different type is defined in another translation unit
23498 |         json_value m_value = {};
      |                    ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:19726:11: note: type 'union json_value' itself violates the C++ One Definition Rule
19726 |     union json_value
      |           ^
llama/llama.cpp/common/json.hpp:19726:11: note: the incompatible type is defined here
19726 |     union json_value
      |           ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:19400:7: warning: type 'struct basic_json' violates the C++ One Definition Rule [-Wodr]
19400 | class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-special-member-functions)  
      |       ^
llama/llama.cpp/common/json.hpp:19400:7: note: a different type is defined in another translation unit
19400 | class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-special-member-functions)  
      |       ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:23523:10: note: the first difference of corresponding definitions is field 'm_data'
23523 |     data m_data = {};
      |          ^
llama/llama.cpp/common/json.hpp:23523:10: note: a field of same name but different type is defined in another translation unit
23523 |     data m_data = {};
      |          ^
ollama-0.5.11/llama/llama.cpp/common/json.hpp:23492:12: note: type 'struct data' itself violates the C++ One Definition Rule
23492 |     struct data
      |            ^
llama/llama.cpp/common/json.hpp:23492:12: note: the incompatible type is defined here
23492 |     struct data
      |            ^
ollama-0.5.11/llama/llama.cpp/common/json-schema-to-grammar.h:8:13: warning: 'json_schema_to_grammar' violates the C++ One Definition Rule [-Wodr]
    8 | std::string json_schema_to_grammar(const nlohmann::ordered_json& schema);
      |             ^
llama/llama.cpp/common/json-schema-to-grammar.cpp:1038:13: note: type mismatch in parameter 1
 1038 | std::string json_schema_to_grammar(const json & schema) {
      |             ^
llama/llama.cpp/common/json-schema-to-grammar.cpp:1038:13: note: 'json_schema_to_grammar' was previously declared here