Undefined symbols for architecture x86_64: using a structure defined in header file
6292
What is an undefined reference/unresolved external symbol error and how do I fix it?
150789
C++ on x86-64: when are structs/classes passed and returned in registers?
94643
g++ undefined reference to `boost::system::system_category()'
77123
C++ class header files organization
96289
struct sigaction incomplete error
66040
C++ unresolved external symbol
65880
Why can't structs be declared as const?
142743
Template issue causes linker error (C++)
68099
Undeclared identifier but is declared
91694
'hash_map' was not declared in this scope with g++ 4.2.1
156638
What is the point of header files in C?
153478
Why "using namespace X;" is not allowed inside class/struct level?
39734
undefined reference to `WinMain@16'
108400
Using "namespace foo {" instead of explicitly qualifying outside of header files
60457
Undefined reference to `sin`
23513
Unsized array declaration in a struct
154278
How to undefine a define at commandline using gcc