SAMD51 Adafruit Feather M4

src/cpp11__exceptions.cpp:8:53: error: exception handling disabled, use '-fexceptions' to enable
    8 | auto _test_cpp11__exceptions() -> int { try { throw 42; } catch (int e) { return e - 42; } return 1; }
      |                                                     ^~
src/cpp11__exceptions.cpp:8:82: error: 'e' was not declared in this scope
    8 | auto _test_cpp11__exceptions() -> int { try { throw 42; } catch (int e) { return e - 42; } return 1; }
      |                                     

src/cpp14__shared_timed_mutex.cpp:9:54: error: 'shared_timed_mutex' is not a member of 'std'
    9 | auto _test_cpp14__shared_timed_mutex() -> int { std::shared_timed_mutex m; return 0; }
      |                                                      ^~~~~~~~~~~~~~~~~~
    8 | #include 
  +++ |+#include 
    9 | auto _test_cpp14__shared_timed_mutex() -> int { std::shared_timed_mutex m; return 0; }

src/cpp17__aggregate_bases.cpp:10:62: error: no matching function for call to 'Derived::Derived()'
   10 | auto _test_cpp17__aggregate_bases() -> int { Derived d{{1}, 2}; return d.x + d.y - 3; }
      |                                                              ^
    9 | struct Derived : Base { int y; };
      |        ^~~~~~~

src/cpp17__deduction_guides.cpp:9:65: error: missing template arguments before '(' token
    9 | auto _test_cpp17__deduction_guides() -> int { auto p = std::pair(1, 2.0); return p.first - 1; }
      |                                                                 ^

src/cpp17__guaranteed_copy_elision.cpp:9:31: error: use of deleted function 'NoCopy::NoCopy(NoCopy&&)'
    9 | NoCopy make() { return NoCopy{}; }
      |                               ^
    8 | struct NoCopy { NoCopy() = default; NoCopy(const NoCopy&) = delete; NoCopy(NoCopy&&) = delete; };
      |                                                                     ^~~~~~
src/cpp17__guaranteed_copy_elision.cpp:10:70: error: use of deleted function 'NoCopy::NoCopy(NoCopy&&)'
   10 | auto _test_cp

src/cpp17__noexcept_function_type.cpp:9:65: error: 'is_same_v' is not a member of 'std'; did you mean 'is_same'?
    9 | auto _test_cpp17__noexcept_function_type() -> int { return std::is_same_v ? 1 : 0; }
      |                                                                 ^~~~~~~~~
      |                                                                 is_same
src/cpp17__noexcept_function_type.cpp:9:81: error: expected ';' before 'noexcept'
    9 | auto _test_cpp17_

src/cpp17__nontype_template_args.cpp:9:12: error: non-type template parameters of class type only available with '-std=c++2a' or '-std=gnu++2a'
    9 | template constexpr int get() { return s.v; }
      |            ^
src/cpp17__nontype_template_args.cpp:10:70: error: no matching function for call to 'get()'
   10 | auto _test_cpp17__nontype_template_args() -> int { return get() - 42; }
      |                                                                      ^
    9 | temp

src/cpp17__nontype_template_parameter_auto.cpp:8:15: error: 'auto' parameter not permitted in this context
    8 | template constexpr auto value = N;
      |               ^
    9 | auto _test_cpp17__nontype_template_parameter_auto() -> int { return value<42> - 42; }
      |                                                                     ^~~~~~~~~

src/cpp17__template_template_args.cpp:10:74: error: type/value mismatch at argument 1 in template parameter list for 'template class C, class T> struct Wrap'
   10 | auto _test_cpp17__template_template_args() -> int { Wrap w; w.c.push_back(42); return w.c[0] - 42; }
      |                                                                          ^
src/cpp17__template_template_args.cpp:10:81: error: request for member 'c' in 'w', which is of non-class type 'int'

src/cpp17__addressof_constexpr.cpp:10:40: error: call to non-'constexpr' function '_Tp* std::addressof(_Tp&) [with _Tp = const int]'
   10 | constexpr const int* p = std::addressof(x);
      |                          ~~~~~~~~~~~~~~^~~

src/cpp17__any.cpp:11:10: error: 'any' is not a member of 'std'
   11 |     std::any a = 42;
      |          ^~~
src/cpp17__any.cpp:12:17: error: 'any_cast' is not a member of 'std'
   12 |     return std::any_cast(a) - 42;
      |                 ^~~~~~~~
src/cpp17__any.cpp:12:26: error: expected primary-expression before 'int'
   12 |     return std::any_cast(a) - 42;
      |                          ^~~
src/cpp17__any.cpp:12:26: error: expected ';' before 'int'
   12 |     return s

src/cpp17__apply.cpp:14:17: error: 'apply' is not a member of 'std'
   14 |     return std::apply(add, args) - 5;
      |                 ^~~~~

src/cpp17__as_const.cpp:13:71: error: 'as_const' is not a member of 'std'; did you mean 'is_const'?
   13 |     static_assert(std::is_const>::value, "");
      |                                                                       ^~~~~~~~
      |                                                                       is_const
src/cpp17__as_const.cpp:13:71: error: 'as_const' is not a member of 'std'; did you mean 'is_const'?
   13 |     static_a

src/cpp17__atomic_is_always_lock_free.cpp:9:81: error: 'is_always_lock_free' is not a member of 'std::atomic'
    9 | auto _test_cpp17__atomic_is_always_lock_free() -> int { (void)std::atomic::is_always_lock_free; return 0; }
      |                                                                                 ^~~~~~~~~~~~~~~~~~~

src/cpp17__bool_constant.cpp:9:20: error: 'bool_constant' in namespace 'std' does not name a template type
    9 |     using t = std::bool_constant;
      |                    ^~~~~~~~~~~~~
src/cpp17__bool_constant.cpp:10:12: error: 't' has not been declared
   10 |     return t::value ? 0 : 1;
      |            ^

src/cpp17__boyer_moore_searcher.cpp:11:180: error: 'boyer_moore_searcher' is not a member of 'std'
   11 | auto _test_cpp17__boyer_moore_searcher() -> int { std::string haystack = "hello world"; std::string needle = "world"; auto it = std::search(haystack.begin(), haystack.end(), std::boyer_moore_searcher(needle.begin(), needle.end())); return it != haystack.end() ? 0 : 1; }
      |                                                                                                                   

src/cpp17__byte.cpp:11:10: error: 'byte' is not a member of 'std'; did you mean 'byte'?
   11 |     std::byte b{0x42};
      |          ^~~~
In file included from src/cpp17__byte.cpp:1:
src/cpp17__byte.cpp:12:17: error: 'to_integer' is not a member of 'std'
   12 |     return std::to_integer(b) - 0x42;
      |                 ^~~~~~~~~~
src/cpp17__byte.cpp:12:28: error: expected primary-expression before 'int'
   12 |     return std::to_integer(b) - 0x42;
      |                       

src/cpp17__chrono.cpp:9:101: error: 'floor' is not a member of 'std::chrono'
    9 | auto _test_cpp17__chrono() -> int { auto d = std::chrono::milliseconds(1500); auto s = std::chrono::floor(d); return s.count() == 1 ? 0 : 1; }
      |                                                                                                     ^~~~~
In file included from /home/runner/.platformio/packages/toolchain-gccarmnoneeabi/arm-none-eabi/include/c++/9.3.1/math.h:36,
            

src/cpp17__clamp.cpp:11:20: error: 'clamp' is not a member of 'std'
   11 |     int val = std::clamp(150, 0, 100);
      |                    ^~~~~

src/cpp17__execution.cpp:11:85: error: 'std::execution' has not been declared
   11 | auto _test_cpp17__execution() -> int { std::vector v = {3,1,2}; std::sort(std::execution::seq, v.begin(), v.end()); return v[0] == 1 ? 0 : 1; }
      |                                                                                     ^~~~~~~~~

src/cpp17__filesystem.cpp:9:10: error: 'std::filesystem' has not been declared
    9 |     std::filesystem::path p("/tmp");
      |          ^~~~~~~~~~
src/cpp17__filesystem.cpp:10:12: error: 'p' was not declared in this scope
   10 |     return p.empty() ? 1 : 0;
      |            ^

src/cpp17__gcd_lcm.cpp:11:17: error: 'gcd' is not a member of 'std'
   11 |     return std::gcd(12, 8) - 4;
      |                 ^~~

src/cpp17__hardware_interference_size.cpp:9:69: error: 'hardware_destructive_interference_size' is not a member of 'std'
    9 | auto _test_cpp17__hardware_interference_size() -> int { return std::hardware_destructive_interference_size > 0 ? 0 : 1; }
      |                                                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/cpp17__has_unique_object_representations.cpp:9:76: error: 'has_unique_object_representations_v' is not a member of 'std'
    9 | auto _test_cpp17__has_unique_object_representations() -> int { return std::has_unique_object_representations_v ? 0 : 1; }
      |                                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/cpp17__has_unique_object_representations.cpp:9:112: error: expected primary-expression before 'int'
    9 | auto _tes

src/cpp17__hypot.cpp:9:71: error: no matching function for call to 'hypot(double, double, double)'
    9 | auto _test_cpp17__hypot() -> int { double h = std::hypot(1.0, 2.0, 2.0); return h > 2.9 && h < 3.1 ? 0 : 1; }
      |                                                                       ^
In file included from /home/runner/.platformio/packages/toolchain-gccarmnoneeabi/arm-none-eabi/include/c++/9.3.1/cmath:45,
                 from /home/runner/.platformio/packages/toolchain-gccarmnoneeabi

src/cpp17__invoke.cpp:13:17: error: 'invoke' is not a member of 'std'
   13 |     return std::invoke(add, 2, 3) - 5;
      |                 ^~~~~~

src/cpp17__is_aggregate.cpp:11:55: error: 'is_aggregate_v' is not a member of 'std'
   11 | auto _test_cpp17__is_aggregate() -> int { return std::is_aggregate_v && !std::is_aggregate_v ? 0 : 1; }
      |                                                       ^~~~~~~~~~~~~~
src/cpp17__is_aggregate.cpp:11:73: error: expected primary-expression before '>' token
   11 | auto _test_cpp17__is_aggregate() -> int { return std::is_aggregate_v && !std::is_aggregate_v ? 0 : 1; }
  

src/cpp17__is_invocable.cpp:10:55: error: 'is_invocable_v' is not a member of 'std'
   10 | auto _test_cpp17__is_invocable() -> int { return std::is_invocable_v ? 0 : 1; }
      |                                                       ^~~~~~~~~~~~~~
src/cpp17__is_invocable.cpp:10:70: error: expected primary-expression before 'decltype'
   10 | auto _test_cpp17__is_invocable() -> int { return std::is_invocable_v ? 0 : 1; }
      |                  

src/cpp17__launder.cpp:9:65: error: 'launder' is not a member of 'std'
    9 | auto _test_cpp17__launder() -> int { int x = 42; auto* p = std::launder(&x); return *p - 42; }
      |                                                                 ^~~~~~~

src/cpp17__logical_traits.cpp:9:57: error: 'conjunction_v' is not a member of 'std'
    9 | auto _test_cpp17__logical_traits() -> int { return std::conjunction_v ? 0 : 1; }
      |                                                         ^~~~~~~~~~~~~
src/cpp17__logical_traits.cpp:9:85: error: expected primary-expression before ',' token
    9 | auto _test_cpp17__logical_traits() -> int { return std::conjunction_v ? 0 : 1; }
      | 

src/cpp17__make_from_tuple.cpp:10:60: error: 'make_from_tuple' is not a member of 'std'; did you mean 'make_tuple'?
   10 | auto _test_cpp17__make_from_tuple() -> int { auto s = std::make_from_tuple(std::make_tuple(1, 2)); return s.x + s.y - 3; }
      |                                                            ^~~~~~~~~~~~~~~
      |                                                            make_tuple
src/cpp17__make_from_tuple.cpp:10:77: error: expected primary-expression before '>' token

src/cpp17__map_try_emplace.cpp:11:7: error: 'class std::map' has no member named 'try_emplace'; did you mean 'emplace'?
   11 |     m.try_emplace(1, 42);
      |       ^~~~~~~~~~~
      |       emplace

src/cpp17__math_special_functions.cpp:9:69: error: 'riemann_zeta' is not a member of 'std'
    9 | auto _test_cpp17__math_special_functions() -> int { double v = std::riemann_zeta(2.0); return v > 1.6 && v < 1.7 ? 0 : 1; }
      |                                                                     ^~~~~~~~~~~~

src/cpp17__memory_resource.cpp:9:61: error: 'std::pmr' has not been declared
    9 | auto _test_cpp17__memory_resource() -> int { auto* r = std::pmr::get_default_resource(); return r != nullptr ? 0 : 1; }
      |                                                             ^~~

src/cpp17__node_extract.cpp:9:89: error: 'class std::map' has no member named 'extract'
    9 | auto _test_cpp17__node_extract() -> int { std::map a = {{1,2}}, b; auto nh = a.extract(1); b.insert(std::move(nh)); return b[1] - 2; }
      |                                                                                         ^~~~~~~

src/cpp17__nonmember_container_access.cpp:9:88: error: 'size' is not a member of 'std'
    9 | auto _test_cpp17__nonmember_container_access() -> int { int a[] = {1,2,3}; return std::size(a) == 3 ? 0 : 1; }
      |                                                                                        ^~~~

src/cpp17__not_fn.cpp:10:24: error: 'not_fn' is not a member of 'std'
   10 |     auto is_odd = std::not_fn(is_even);
      |                        ^~~~~~

src/cpp17__optional.cpp:11:10: error: 'optional' is not a member of 'std'
   11 |     std::optional val = 42;
      |          ^~~~~~~~
src/cpp17__optional.cpp:11:19: error: expected primary-expression before 'int'
   11 |     std::optional val = 42;
      |                   ^~~
src/cpp17__optional.cpp:12:12: error: 'val' was not declared in this scope; did you mean 'Tal'?
   12 |     return val.value() - 42;
      |            ^~~
      |            Tal

src/cpp17__parallel_algorithm.cpp:9:68: error: 'std::execution' has not been declared
    9 | auto _test_cpp17__parallel_algorithm() -> int { auto policy = std::execution::seq; (void)policy; return 0; }
      |                                                                    ^~~~~~~~~

src/cpp17__raw_memory_algorithms.cpp:9:240: error: 'destroy' is not a member of 'std'
    9 | auto _test_cpp17__raw_memory_algorithms() -> int { int src[] = {1,2,3}; alignas(int) unsigned char buf[sizeof(src)]; auto* dst = reinterpret_cast(buf); std::uninitialized_copy(src, src+3, dst); int v = dst[0] + dst[1] + dst[2]; std::destroy(dst, dst+3); return v - 6; }
      |                                                                                                                           

In file included from src/cpp17__sample.cpp:1:
src/cpp17__sample.cpp:12:98: error: 'sample' is not a member of 'std'
   12 | auto _test_cpp17__sample() -> int { std::vector v = {1,2,3,4,5}; std::vector out; std::sample(v.begin(), v.end(), std::back_inserter(out), 2, std::mt19937{}); return out.size() == 2 ? 0 : 1; }
      |                                                                                                  ^~~~~~

src/cpp17__scoped_lock.cpp:9:10: error: 'mutex' is not a member of 'std'
    9 |     std::mutex m;
      |          ^~~~~
    7 | #include 
  +++ |+#include 
    8 | auto _test_cpp17__scoped_lock() -> int {
src/cpp17__scoped_lock.cpp:10:10: error: 'scoped_lock' is not a member of 'std'
   10 |     std::scoped_lock lock(m);
      |          ^~~~~~~~~~~

src/cpp17__shared_mutex.cpp:9:48: error: 'shared_mutex' is not a member of 'std'
    9 | auto _test_cpp17__shared_mutex() -> int { std::shared_mutex m; return 0; }
      |                                                ^~~~~~~~~~~~

src/cpp17__shared_ptr_weak_type.cpp:9:83: error: 'weak_type' in 'class std::shared_ptr' does not name a type
    9 | auto _test_cpp17__shared_ptr_weak_type() -> int { using W = std::shared_ptr::weak_type; auto sp = std::make_shared(42); W wp = sp; return wp.expired() ? 1 : 0; }
      |                                                                                   ^~~~~~~~~
src/cpp17__shared_ptr_weak_type.cpp:9:131: error: 'W' was not declared in this scope
    9 | auto _test_cp

src/cpp17__string_view.cpp:11:10: error: 'string_view' is not a member of 'std'
   11 |     std::string_view sv = "hello";
      |          ^~~~~~~~~~~
src/cpp17__string_view.cpp:12:29: error: 'sv' was not declared in this scope; did you mean 'sq'?
   12 |     return static_cast(sv.size()) - 5;
      |                             ^~
      |                             sq

src/cpp17__type_trait_variable_templates.cpp:9:17: error: 'is_integral_v' is not a member of 'std'; did you mean 'is_integral'?
    9 |     return std::is_integral_v && !std::is_floating_point_v ? 0 : 1;
      |                 ^~~~~~~~~~~~~
      |                 is_integral
src/cpp17__type_trait_variable_templates.cpp:9:31: error: expected primary-expression before 'int'
    9 |     return std::is_integral_v && !std::is_floating_point_v ? 0 : 1;
      |                    

src/cpp17__unordered_map_try_emplace.cpp:10:98: error: 'class std::unordered_map, int>' has no member named 'try_emplace'; did you mean 'emplace'?
   10 | auto _test_cpp17__unordered_map_try_emplace() -> int { std::unordered_map m; m.try_emplace("key", 42); return m["key"] - 42; }
      |                                                                                                  ^~~~~~~~~~~
      |                                           

src/cpp17__variant.cpp:11:10: error: 'variant' is not a member of 'std'
   11 |     std::variant v = 42;
      |          ^~~~~~~
src/cpp17__variant.cpp:11:18: error: expected primary-expression before 'int'
   11 |     std::variant v = 42;
      |                  ^~~
src/cpp17__variant.cpp:12:17: error: 'get' is not a member of 'std'
   12 |     return std::get(v) - 42;
      |                 ^~~
src/cpp17__variant.cpp:12:21: error: expected primary-expression bef