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Patch #453627: Define the following macros when compiling on a UnixWare 7.x system:

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SCO_ATAN2_BUG, SCO_ACCEPT_BUG, and STRICT_SYSV_CURSES.
Work aroudn a bug in the SCO UnixWare atan2() implementation.
This commit is contained in:
Martin v. Löwis 2001-09-05 14:45:54 +00:00
parent 0ace326ed2
commit 655c9557f6
4 changed files with 59 additions and 4 deletions
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18
Modules/mathmodule.c
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@ -31,6 +31,22 @@ extern double modf (double, double *);
#define CHECK(x) /* Don't know how to check */
#endif
#ifdef SCO_ATAN2_BUG
/*
* UnixWare 7+ is known to have a bug in atan2 that will return PI instead
* of ZERO (0) if the first argument is ZERO(0).
*/
static double atan2_sco(double x, double y)
{
if (x == 0.0)
return (double)0.0;
return atan2(x, y);
}
#define ATAN2 atan2_sco
#else
#define ATAN2 atan2
#endif
/* Call is_error when errno != 0, and where x is the result libm
* returned. is_error will usually set up an exception and return
* true (1), but may return false (0) without setting up an exception.
@ -115,7 +131,7 @@ FUNC1(asin, asin,
"asin(x)\n\nReturn the arc sine (measured in radians) of x.")
FUNC1(atan, atan,
"atan(x)\n\nReturn the arc tangent (measured in radians) of x.")
FUNC2(atan2, atan2,
FUNC2(atan2, ATAN2,
"atan2(y, x)\n\nReturn the arc tangent (measured in radians) of y/x.\n"
"Unlike atan(y/x), the signs of both x and y are considered.")
FUNC1(ceil, ceil,