Meaning of Undefined reference error
6292
What is an undefined reference/unresolved external symbol error and how do I fix it?
84171
What is the difference between a weak reference and an unowned reference?
66080
g++ undefined reference to typeinfo
2561
Why is the error function defined as it is?
68463
How to resolve the linker error in C++ compiler
37735
How can I check for "undefined" in JavaScript?
32989
Is there a symbol to mean 'this is undefined'?
5573
Undefined reference error for template method
88920
Is using NULL references OK?
150233
Why doesn't reference-to-member exist in C++?
50915
Undefined variable problem with PHP function
66916
Expressions containing globally undefined symbols inside a function where they are defined
91338
! Undefined control sequence
54646
How undefined is undefined behavior?
60457
Undefined reference to `sin`
19353
Undefined index error PHP
154299
Is the output of printf ("%d %d", c++, c); also undefined?