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[AIX][clang] include_next through clang provided float.h 

AIX provides additional definitions in the system libc float.h that we
would like to be available to users, so we need to include_next through,
similar to what is done on some other platforms.

We also adjust the guards for some definitions which are restricted
based on language level to also be provide with the _ALL_SOURCE feature
test macro on AIX, similar to what is done by the platform float.h
header, so we don't run into cases where we don't provide the compiler
macro but still have a different definition from the system.

Differential Revision: https://reviews.llvm.org/D117935
This commit is contained in:
David Tenty 2022-01-17 15:32:33 -05:00
parent f4744e9ae0
commit 27ee91162d
3 changed files with 23 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
clang/lib/Headers/float.h
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@ -14,10 +14,11 @@
* additional definitions provided for Windows.
* For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
*
* Also fall back on Darwin to allow additional definitions and
* Also fall back on Darwin and AIX to allow additional definitions and
* implementation-defined values.
*/
#if (defined(__APPLE__) || (defined(__MINGW32__) || defined(_MSC_VER))) && \
#if (defined(__APPLE__) || defined(__MINGW32__) || defined(_MSC_VER) || \
defined(_AIX)) && \
__STDC_HOSTED__ && __has_include_next(<float.h>)
/* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level
@ -37,7 +38,9 @@
# undef FLT_MANT_DIG
# undef DBL_MANT_DIG
# undef LDBL_MANT_DIG
# if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || \
__cplusplus >= 201103L || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef DECIMAL_DIG
# endif
# undef FLT_DIG
@ -64,7 +67,9 @@
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || \
__cplusplus >= 201703L || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef FLT_TRUE_MIN
# undef DBL_TRUE_MIN
# undef LDBL_TRUE_MIN
@ -87,7 +92,9 @@
#define DBL_MANT_DIG __DBL_MANT_DIG__
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || \
__cplusplus >= 201103L || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define DECIMAL_DIG __DECIMAL_DIG__
#endif
@ -123,7 +130,9 @@
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || \
__cplusplus >= 201703L || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define FLT_TRUE_MIN __FLT_DENORM_MIN__
# define DBL_TRUE_MIN __DBL_DENORM_MIN__
# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__

2
clang/test/Headers/Inputs/include/float.h Normal file
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@ -0,0 +1,2 @@
#pragma once
#define FLOAT_LOCAL_DEF 1

6
clang/test/Headers/float-aix.c Normal file
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@ -0,0 +1,6 @@
// RUN: %clang_cc1 -triple powerpc-ibm-aix -fsyntax-only -verify -internal-isystem %S/Inputs/include %s
// expected-no-diagnostics
#include <float.h>
_Static_assert(FLOAT_LOCAL_DEF, "");