Eric Postpischil

Eric Postpischil has asked 35 questions and find answers to 809 problems.

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About

Senior software engineer in Apple’s Vector and Numerics Group (retired).

Eric Postpischil questions

How to fix "variable previously declared 'static' redeclared 'extern' error"? [duplicate]
Is an fscanf/scanf/sscanf conversion specification with assignment suppressed not a conversion?
Is GCC warning on const qualifier correct?
Is assigning to a union member from a different member in the same union defined by the C standard?
Why is _Alignof missing from the rule about converting an array to a pointer?
Why was SIGFPE used for integer arithmetic exceptions?
Is a redeclaration of an untagged structure a compatible type?
May C evaluate with multiple floating-point formats?
How are multiple prior declarations resolved for a new declaration with extern?
Can a pointer to an incomplete type be incomplete?

Eric Postpischil answers

Python why is 10e26 != 10**26 ? (Floating point inaccuracy?)
How does a compiler choose which function to link?
Name of the conversion symbol in C
Approximation of arcsin in C
Why i am getting segmentation fault when changing const static variable through non-constant pointer variable?
When is the compiler allowed to optimize away a validity check of an enum or enum class type value in C++?
Why void pointer if pointers can be casted into any type(in c)?
Is it legal for a compiler to optimize calls to malloc to return more weakly aligned memory?
Using C unions to "reserve" space in data - reasonable?
Why bitwise complement of a 1-byte variable returns a 4-byte value?