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[clang] Only provide C11 features in <float.h> starting with C++17

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Summary:
In r353970, I enabled those features in C++11 and above. To be strictly
conforming, those features should only be enabled in C++17 and above.

Reviewers: jfb, eli.friedman

Subscribers: jkorous, dexonsmith, libcxx-commits

Differential Revision: https://reviews.llvm.org/D58289

llvm-svn: 354691
This commit is contained in:
Louis Dionne
2019-02-22 20:48:54 +00:00
parent e69f94e022
commit c2d95792d6
2 changed files with 4 additions and 4 deletions
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4
clang/lib/Headers/float.h
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@@ -78,7 +78,7 @@
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
# if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
# undef FLT_TRUE_MIN
# undef DBL_TRUE_MIN
# undef LDBL_TRUE_MIN
@@ -137,7 +137,7 @@
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
# define FLT_TRUE_MIN __FLT_DENORM_MIN__
# define DBL_TRUE_MIN __DBL_DENORM_MIN__
# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__

4
clang/test/Headers/float.c
View File

@@ -45,7 +45,7 @@
#endif
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
#ifndef FLT_DECIMAL_DIG
#error "Mandatory macro FLT_DECIMAL_DIG is missing."
#elif FLT_DECIMAL_DIG < 6
@@ -215,7 +215,7 @@ _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__) || __cplusplus >= 201103L
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
_Static_assert(FLT_DECIMAL_DIG == __FLT_DECIMAL_DIG__, "");
_Static_assert(DBL_DECIMAL_DIG == __DBL_DECIMAL_DIG__, "");
_Static_assert(LDBL_DECIMAL_DIG == __LDBL_DECIMAL_DIG__, "");