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[clang] Make sure C99/C11 features in <float.h> are provided in C++11 

Summary:
Previously, those #defines were only provided in C or when GNU extensions were
enabled. We need those #defines in C++11 and above, too.

Reviewers: jfb, eli.friedman

Subscribers: jkorous, dexonsmith, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58149

llvm-svn: 353970
This commit is contained in:
Louis Dionne 2019-02-13 19:08:01 +00:00
parent acf81a7c14
commit defa9f8f85
2 changed files with 12 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
clang/lib/Headers/float.h
View File

@ -51,7 +51,7 @@
# undef FLT_MANT_DIG
# undef DBL_MANT_DIG
# undef LDBL_MANT_DIG
# if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
# if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# undef DECIMAL_DIG
# endif
# undef FLT_DIG
@ -78,7 +78,7 @@
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# undef FLT_TRUE_MIN
# undef DBL_TRUE_MIN
# undef LDBL_TRUE_MIN
@ -101,7 +101,7 @@
#define DBL_MANT_DIG __DBL_MANT_DIG__
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# define DECIMAL_DIG __DECIMAL_DIG__
#endif
@ -137,7 +137,7 @@
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# define FLT_TRUE_MIN __FLT_DENORM_MIN__
# define DBL_TRUE_MIN __DBL_DENORM_MIN__
# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__

13
clang/test/Headers/float.c
View File

@ -1,6 +1,9 @@
// RUN: %clang_cc1 -fsyntax-only -verify -std=c89 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c99 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++11 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++14 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++17 -ffreestanding %s
// expected-no-diagnostics
/* Basic floating point conformance checks against:
@ -11,7 +14,7 @@
/*
C11, 5.2.4.2.2p11, pp. 30
C99, 5.2.4.2.2p9, pp. 25
C89, 2.2.4.2
C89, 2.2.4.2
*/
#include <float.h>
@ -42,7 +45,7 @@
#endif
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#ifndef FLT_DECIMAL_DIG
#error "Mandatory macro FLT_DECIMAL_DIG is missing."
#elif FLT_DECIMAL_DIG < 6
@ -98,7 +101,7 @@
#endif
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#ifndef DECIMAL_DIG
#error "Mandatory macro DECIMAL_DIG is missing."
#elif DECIMAL_DIG < 10
@ -212,13 +215,13 @@ _Static_assert(FLT_MANT_DIG == __FLT_MANT_DIG__, "");
_Static_assert(DBL_MANT_DIG == __DBL_MANT_DIG__, "");
_Static_assert(LDBL_MANT_DIG == __LDBL_MANT_DIG__, "");
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
_Static_assert(FLT_DECIMAL_DIG == __FLT_DECIMAL_DIG__, "");
_Static_assert(DBL_DECIMAL_DIG == __DBL_DECIMAL_DIG__, "");
_Static_assert(LDBL_DECIMAL_DIG == __LDBL_DECIMAL_DIG__, "");
#endif
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__)
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
_Static_assert(DECIMAL_DIG == __DECIMAL_DIG__, "");
#endif