### Document: WG14 N995

### Date: 2003-02-11

## Defect Report #2dd

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**Submitter:** Douglas Walls (US)

**Submission Date:** 2003-02-11

**Source:** J11

**Reference Document:** ISO/IEC WG14 N995

**Version:** 1.0

**Date:** 2003-02-11

**Subject:** Does <math.h> define INT_MIN and INT_MAX?

**Summary**

<math.h> defines macros in terms of INT_MIN and INT_MAX.
<math.h> defines functions returning the value of INT_MIN.
It is unclear if inclusion of <math.h> defines INT_MIN and INT_MAX
or also includes <limits.h>.

**Details**

The description of <math.h> in C99 (section 7.12) says that the
macros FP_ILOGB0 and FP_ILOGBNAN are defined in <math.h> with values,
respectively INT_MIN or -INT_MAX and INT_MAX or INT_MIN, but never says
that INT_MIN and INT_MAX are defined in <math.h>.

The synopsis of 7.12.6.5 The ilogb function says:

#include <math.h>
int ilogb(double x);
int ilogbf(float x);
int ilogbl(long double x);

The description of 7.12.6.5 The ilogb functions says
"if x is infinite they compute the value INT_MAX;".
Does this mean that <math.h> includes <limits.h>?

Does this mean that <math.h> defines INT_MIN and INT_MAX?

**Suggested Technical Corrigendum**

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