Fix _LIBCPP_HAS_ definitions for Android.

[enh]

Summary

Android added quick_exit()/at_quick_exit() in API level 21,
aligned_alloc() in API level 28, and timespec_get() in API level 29,
but has the other C11 features at all API levels (since they're basically
just coming from clang directly).

_LIBCPP_HAS_QUICK_EXIT and _LIBCPP_HAS_TIMESPEC_GET already existed,
so we can reuse them. (And use _LIBCPP_HAS_TIMESPEC_GET in a few more
places where _LIBCPP_HAS_C11_FEATURES has been used as a proxy. This
isn't correct for Android.)

_LIBCPP_HAS_ALIGNED_ALLOC is added, to cover aligned_alloc() (obviously).

Add a missing std:: before aligned_alloc in a cstdlib test, and remove a
couple of !defined(_WIN32)s now that we're explicitly testing
TEST_HAS_ALIGNED_ALLOC rather than TEST_HAS_C11_FEATURES.

[danalbert]

LGTM

[danalbert]

https://github.com/llvm/llvm-project/commit/19fd9039ca242f408493b5c662f9d908eab8555e

libcxx/include/__config

 
 #if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
 #  if defined(__FreeBSD__)
+#    define _LIBCPP_HAS_ALIGNED_ALLOC
 #    define _LIBCPP_HAS_QUICK_EXIT
 #    define _LIBCPP_HAS_C11_FEATURES
+#  elif defined(__BIONIC__)
+#    define _LIBCPP_HAS_C11_FEATURES
+#    if __ANDROID_API__ >= 21
+#      define _LIBCPP_HAS_QUICK_EXIT
+#    endif
+#    if __ANDROID_API__ >= 28
+#      define _LIBCPP_HAS_ALIGNED_ALLOC
+#    endif
+#    if __ANDROID_API__ >= 29
+#      define _LIBCPP_HAS_TIMESPEC_GET
+#    endif
 #  elif defined(__Fuchsia__) || defined(__wasi__)
+#    define _LIBCPP_HAS_ALIGNED_ALLOC
 #    define _LIBCPP_HAS_QUICK_EXIT
 #    define _LIBCPP_HAS_TIMESPEC_GET
 #    define _LIBCPP_HAS_C11_FEATURES

 #        define _LIBCPP_HAS_QUICK_EXIT
 #      endif
 #      if _LIBCPP_GLIBC_PREREQ(2, 17)
+#        define _LIBCPP_HAS_ALIGNED_ALLOC
 #        define _LIBCPP_HAS_C11_FEATURES
 #        define _LIBCPP_HAS_TIMESPEC_GET
 #      endif
 #    else // defined(_LIBCPP_HAS_MUSL_LIBC)
+#      define _LIBCPP_HAS_ALIGNED_ALLOC
 #      define _LIBCPP_HAS_QUICK_EXIT
 #      define _LIBCPP_HAS_TIMESPEC_GET
 #      define _LIBCPP_HAS_C11_FEATURES

libcxx/include/cstdlib

 using ::at_quick_exit;
 using ::quick_exit;
 #endif
-#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_C11_FEATURES)
+#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_ALIGNED_ALLOC)
 using ::aligned_alloc;
 #endif
 

libcxx/include/ctime

 using ::size_t;
 using ::time_t;
 using ::tm;
-#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_C11_FEATURES)
+#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_TIMESPEC_GET)
 using ::timespec;
 #endif
 using ::clock;

libcxx/test/std/depr/depr.c.headers/stdlib_h.pass.cpp

     static_assert((std::is_same<decltype(rand()), int>::value), "");
     static_assert((std::is_same<decltype(srand(0)), void>::value), "");
 
-//  Microsoft does not implement aligned_alloc in their C library
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES) && !defined(_WIN32)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_ALIGNED_ALLOC)
     static_assert((std::is_same<decltype(aligned_alloc(0,0)), void*>::value), "");
 #endif
 

libcxx/test/std/language.support/support.runtime/cstdlib.pass.cpp

     static_assert((std::is_same<decltype(std::rand()), int>::value), "");
     static_assert((std::is_same<decltype(std::srand(0)), void>::value), "");
 
-//  Microsoft does not implement aligned_alloc in their C library
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES) && !defined(_WIN32)
-    static_assert((std::is_same<decltype(aligned_alloc(0,0)), void*>::value), "");
+#if TEST_STD_VER > 14 && defined(TEST_HAS_ALIGNED_ALLOC)
+    static_assert((std::is_same<decltype(std::aligned_alloc(0,0)), void*>::value), "");
 #endif
 
     static_assert((std::is_same<decltype(std::calloc(0,0)), void*>::value), "");

libcxx/test/std/language.support/support.runtime/ctime.pass.cpp

 #error CLOCKS_PER_SEC not defined
 #endif
 
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
 #ifndef TIME_UTC
 #error TIME_UTC not defined
 #endif

     std::size_t s = 0;
     std::time_t t = 0;
     std::tm tm = {};
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
     std::timespec tmspec = {};
     ((void)tmspec); // Prevent unused warning
 #endif

libcxx/test/std/utilities/time/date.time/ctime.pass.cpp

 #error CLOCKS_PER_SEC not defined
 #endif
 
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
 #ifndef TIME_UTC
 #error TIME_UTC not defined
 #endif

     ((void)t); // Prevent unused warning
     ((void)tm); // Prevent unused warning
     ((void)str); // Prevent unused warning
-#if TEST_STD_VER > 14 && defined(TEST_HAS_C11_FEATURES)
+#if TEST_STD_VER > 14 && defined(TEST_HAS_TIMESPEC_GET)
     std::timespec tmspec = {};
     ((void)tmspec); // Prevent unused warning
 #endif

libcxx/test/support/test_macros.h

 #  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_ALIGNED_ALLOC
 #    define TEST_HAS_C11_FEATURES
+#  elif defined(__BIONIC__)
+#    define TEST_HAS_C11_FEATURES
+#    if __ANDROID_API__ >= 28
+#      define TEST_HAS_ALIGNED_ALLOC
+#    endif
+#    if __ANDROID_API__ >= 29
+#      define TEST_HAS_TIMESPEC_GET
+#    endif
 #  elif defined(__Fuchsia__) || defined(__wasi__)
+#    define TEST_HAS_ALIGNED_ALLOC
 #    define TEST_HAS_C11_FEATURES
 #    define TEST_HAS_TIMESPEC_GET
 #  elif defined(__linux__)

 // newlib, etc may all support these features but need to be configured.
 #    if defined(TEST_GLIBC_PREREQ)
 #      if TEST_GLIBC_PREREQ(2, 17)
+#        define TEST_HAS_ALIGNED_ALLOC
 #        define TEST_HAS_TIMESPEC_GET
 #        define TEST_HAS_C11_FEATURES
 #      endif
 #    elif defined(_LIBCPP_HAS_MUSL_LIBC)
+#      define TEST_HAS_ALIGNED_ALLOC
 #      define TEST_HAS_C11_FEATURES
 #      define TEST_HAS_TIMESPEC_GET
 #    endif
 #  elif defined(_WIN32)
 #    if defined(_MSC_VER) && !defined(__MINGW32__)
+#      define TEST_HAS_ALIGNED_ALLOC
 #      define TEST_HAS_C11_FEATURES // Using Microsoft's C Runtime library
 #      define TEST_HAS_TIMESPEC_GET
 #    endif