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aix: Protect AIX math.h overloads with new macro. 

AIX math.h provides C++ overloaded inlined math functions, which should
not be present for G++. The definitions have been guaded by
__COMPATMATH__, but that macro had other uses in IBM xlC++. A new
macro has been introduced with the sole purpose of guarding the functions.
This patch updates libstdc++ os_defines.h to define the additional macro.
The earlier macro definition is retained to guard the functions in the
math.h header of earlier AIX releases.

libstdc++-v3/ChangeLog:

	* config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
This commit is contained in:
David Edelsohn 2021-07-21 14:06:45 -04:00
parent c9ca352186
commit 3f7a2374d3
1 changed files with 5 additions and 0 deletions
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5
libstdc++-v3/config/os/aix/os_defines.h
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@ -1,3 +1,4 @@
// SPDX-License-Identifier: GPL-3.0-or-later WITH GCC-exception-3.1
// Specific definitions for AIX -*- C++ -*-
// Copyright (C) 2000-2021 Free Software Foundation, Inc.
@ -48,6 +49,10 @@
#define __COMPATMATH__
#endif
#ifndef __LIBC_NO_CPP_MATH_OVERLOADS__
#define __LIBC_NO_CPP_MATH_OVERLOADS__
#endif
// No support for referencing weak symbols without a definition.
#define _GLIBCXX_USE_WEAK_REF 0