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mesa: Check that _XOPEN_SOURCE is defined before using it.

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Vinson Lee 2010-08-15 13:08:15 -07:00
parent 9349379d1a
commit a0b0afc694
1 changed files with 1 additions and 1 deletions
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2
src/mesa/main/imports.h
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@ -120,7 +120,7 @@ typedef union { GLfloat f; GLint i; } fi_type;
* \name Work-arounds for platforms that lack C99 math functions
*/
/*@{*/
#if (_XOPEN_SOURCE < 600) && !defined(_ISOC99_SOURCE) \
#if (defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE < 600)) && !defined(_ISOC99_SOURCE) \
&& (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)) \
&& (!defined(_MSC_VER) || (_MSC_VER < 1400))
#define acosf(f) ((float) acos(f))