CODEWITHSUNDEEP
c++cgccconditional-compilation
manav m-n
manav m-n

Reputation: 11394

conditional compilation statement in limits.h

I am not able to understand the following statement from the file limits.h. What is the use of this statement and what does it accomplishes?

/* If we are not using GNU CC we have to define all the symbols ourself.
   Otherwise use gcc's definitions (see below).  */
#if !defined __GNUC__ || __GNUC__ < 2

Upvotes: 1

Views: 321

Answers (2)

Abubacker Nainamohamed
Abubacker Nainamohamed

Reputation: 4797

It checks whether you are not using a Gcc compiler Version 2 or Gcc some other versions. using this pre-processor macro we can some portable codes.

Upvotes: 2

Johan Kotlinski
Johan Kotlinski

Reputation: 25749

It checks if your program is compiled by some other compiler than GCC, or some very old GCC version.

Upvotes: 4

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