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Apparently FreeBSD enables some HW floating-point exceptions by default.

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This can cause core dumps when Python runs.  Python relies on the 754-
(and C99-) mandated default "non-stop" mode for FP exceptions.  This
patch from Ben Laurie disables at least one FP exception on FreeBSD at
Python startup time.
This commit is contained in:
Tim Peters 2002-12-28 21:56:08 +00:00
parent 5b26abb37a
commit 4643bd9a9c
3 changed files with 26 additions and 5 deletions
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15
Include/pyport.h
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@ -255,10 +255,15 @@ extern "C" {
* if the returned result is a NaN, or if a C89 box returns HUGE_VAL
* in non-overflow cases.
* X is evaluated more than once.
* Some platforms have better way to spell this, so expect some #ifdef'ery.
*/
#ifdef __FreeBSD__
#define Py_OVERFLOWED(X) isinf(X)
#else
#define Py_OVERFLOWED(X) ((X) != 0.0 && (errno == ERANGE || \
(X) == Py_HUGE_VAL || \
(X) == -Py_HUGE_VAL))
#endif
/* Py_SET_ERANGE_ON_OVERFLOW(x)
* If a libm function did not set errno, but it looks like the result
@ -320,7 +325,7 @@ extern "C" {
#if defined(__GNUC__) && (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)
#define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
#else
#define Py_DEPRECATED(VERSION_UNUSED)
#define Py_DEPRECATED(VERSION_UNUSED)
#endif
/**************************************************************************
@ -395,17 +400,17 @@ extern double hypot(double, double);
/* Declarations for symbol visibility.
PyAPI_FUNC(type): Declares a public Python API function and return type
PyAPI_DATA(type): Declares public Python data and its type
PyAPI_DATA(type): Declares public Python data and its type
PyMODINIT_FUNC: A Python module init function. If these functions are
inside the Python core, they are private to the core.
If in an extension module, it may be declared with
inside the Python core, they are private to the core.
If in an extension module, it may be declared with
external linkage depending on the platform.
As a number of platforms support/require "__declspec(dllimport/dllexport)",
we support a HAVE_DECLSPEC_DLL macro to save duplication.
*/
/*
/*
All windows ports, except cygwin, are handled in PC/pyconfig.h
BeOS is only other autoconf platform requiring special linkage handling
and both these use __declspec()