Selectively import timespec_get into namespace std, since some C libraries don't have it. Reviewed as https://reviews.llvm.org/D50799
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@339816 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index cd2a135..06af4dc 100644
--- a/include/__config
+++ b/include/__config
@@ -334,6 +334,7 @@
# define _LIBCPP_HAS_C11_FEATURES
# elif defined(__Fuchsia__)
# define _LIBCPP_HAS_QUICK_EXIT
+# define _LIBCPP_HAS_TIMESPEC_GET
# define _LIBCPP_HAS_C11_FEATURES
# elif defined(__linux__)
# if !defined(_LIBCPP_HAS_MUSL_LIBC)
@@ -342,9 +343,11 @@
# endif
# if _LIBCPP_GLIBC_PREREQ(2, 17)
# define _LIBCPP_HAS_C11_FEATURES
+# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# else // defined(_LIBCPP_HAS_MUSL_LIBC)
# define _LIBCPP_HAS_QUICK_EXIT
+# define _LIBCPP_HAS_TIMESPEC_GET
# define _LIBCPP_HAS_C11_FEATURES
# endif
# endif // __linux__
diff --git a/include/cstdlib b/include/cstdlib
index 78c4284..00c604e 100644
--- a/include/cstdlib
+++ b/include/cstdlib
@@ -151,11 +151,11 @@
using ::wctomb;
using ::mbstowcs;
using ::wcstombs;
-#ifdef _LIBCPP_HAS_QUICK_EXIT
+#if !defined(_LIBCPP_CXX03_LANG) && defined(_LIBCPP_HAS_QUICK_EXIT)
using ::at_quick_exit;
using ::quick_exit;
#endif
-#ifdef _LIBCPP_HAS_C11_FEATURES
+#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_C11_FEATURES)
using ::aligned_alloc;
#endif
diff --git a/include/ctime b/include/ctime
index 81cf11a..8264fe3 100644
--- a/include/ctime
+++ b/include/ctime
@@ -73,7 +73,7 @@
using ::localtime;
#endif
using ::strftime;
-#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_C11_FEATURES)
+#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_TIMESPEC_GET)
using ::timespec_get;
#endif
diff --git a/test/std/language.support/support.runtime/ctime.pass.cpp b/test/std/language.support/support.runtime/ctime.pass.cpp
index 908dc48..d80bc19 100644
--- a/test/std/language.support/support.runtime/ctime.pass.cpp
+++ b/test/std/language.support/support.runtime/ctime.pass.cpp
@@ -45,7 +45,7 @@
static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
static_assert((std::is_same<decltype(std::timespec_get(nullptr, 0)), int>::value), "");
#endif
#ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
diff --git a/test/std/utilities/time/date.time/ctime.pass.cpp b/test/std/utilities/time/date.time/ctime.pass.cpp
index fe9f38d..cd1f32b 100644
--- a/test/std/utilities/time/date.time/ctime.pass.cpp
+++ b/test/std/utilities/time/date.time/ctime.pass.cpp
@@ -47,7 +47,7 @@
static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
static_assert((std::is_same<decltype(std::timespec_get(nullptr, 0)), int>::value), "");
#endif
#ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
diff --git a/test/support/test_macros.h b/test/support/test_macros.h
index d774fc0..e008b53 100644
--- a/test/support/test_macros.h
+++ b/test/support/test_macros.h
@@ -124,22 +124,29 @@
// Sniff out to see if the underling C library has C11 features
// Note that at this time (July 2018), MacOS X and iOS do NOT.
+// This is cribbed from __config; but lives here as well because we can't assume libc++
#if __ISO_C_VISIBLE >= 2011 || TEST_STD_VER >= 11
# if defined(__FreeBSD__)
+// Specifically, FreeBSD does NOT have timespec_get, even though they have all
+// the rest of C11 - this is PR#38495
# define TEST_HAS_C11_FEATURES
# elif defined(__Fuchsia__)
# define TEST_HAS_C11_FEATURES
+# define TEST_HAS_TIMESPEC_GET
# elif defined(__linux__)
# if !defined(_LIBCPP_HAS_MUSL_LIBC)
# if _LIBCPP_GLIBC_PREREQ(2, 17)
+# define TEST_HAS_TIMESPEC_GET
# define TEST_HAS_C11_FEATURES
# endif
# else // defined(_LIBCPP_HAS_MUSL_LIBC)
# define TEST_HAS_C11_FEATURES
+# define TEST_HAS_TIMESPEC_GET
# endif
# elif defined(_WIN32)
# if defined(_MSC_VER) && !defined(__MINGW32__)
# define TEST_HAS_C11_FEATURES // Using Microsoft's C Runtime library
+# define TEST_HAS_TIMESPEC_GET
# endif
# endif
#endif
