c++ – Std::cout couldn’t be found by the gcc linker MacOs

So I’m getting this linking error with gcc: Undefined symbols for architecture x86_64: “std::__1::locale::use_facet(std::__1::locale::id&) const”, referenced from: std::__1::ctype<char> const& std::__1::use_facet<std::__1::ctype<char> >(std::__1::locale const&) in main-a06879.o “std::__1::ios_base::getloc() const”, referenced from: std::__1::basic_ios<char, std::__1::char_traits<char> >::widen(char) const in main-a06879.o “std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(unsigned long, char)”, referenced from: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(unsigned long, char) in main-a06879.o “std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::~basic_string()”, referenced … Read more

c – gcc windows declared inside parameter list will not be visible outside of this definition or declaration

I have a header file & C file placed in the same directory… The header file obviously just declares things while the C file defines them. To my understanding, this is the correct way to do it. It seems like it is not visible to the linker. (I am currently experimenting with linear probing so … Read more

Custom C++ allocator far too slow in GCC in debug. is there a fix for this?

Reason for the performance decrease gcc’s libstdc++ uses certain performance improvements if the allocator is std::allocator. Your CustomAllocatorType is a different type than std::allocator, meaning that the optimizations are disabled. Note that I am not talking about compiler optimizations but rather that the C++ standard library implements overloads or specializations specifically for std::allocator. To name … Read more