[libc++] Add missing conditionals for feature-test macros (llvm#80168)

ldionne · tstellar · commit 906220c8ee3e · 2024-02-14T17:29:18.000Z
We noticed that some feature-test macros were not conditional on configuration flags like _LIBCPP_HAS_NO_FILESYSTEM. As a result, code attempting to use FTMs would not work as intended. This patch adds conditionals for a few feature-test macros, but more issues may exist. rdar://122020466 (cherry picked from commit f2c8421)
diff --git a/libcxx/include/version b/libcxx/include/version
@@ -266,7 +266,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 # define __cpp_lib_make_reverse_iterator                201402L
 # define __cpp_lib_make_unique                          201304L
 # define __cpp_lib_null_iterators                       201304L
-# define __cpp_lib_quoted_string_io                     201304L
+# if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   define __cpp_lib_quoted_string_io                   201304L
+# endif
 # define __cpp_lib_result_of_sfinae                     201210L
 # define __cpp_lib_robust_nonmodifying_seq_ops          201304L
 # if !defined(_LIBCPP_HAS_NO_THREADS)
@@ -294,7 +296,7 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 # define __cpp_lib_clamp                                201603L
 # define __cpp_lib_enable_shared_from_this              201603L
 // # define __cpp_lib_execution                            201603L
-# if _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
 #   define __cpp_lib_filesystem                         201703L
 # endif
 # define __cpp_lib_gcd_lcm                              201606L
@@ -323,7 +325,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 // # define __cpp_lib_parallel_algorithm                   201603L
 # define __cpp_lib_raw_memory_algorithms                201606L
 # define __cpp_lib_sample                               201603L
-# define __cpp_lib_scoped_lock                          201703L
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   define __cpp_lib_scoped_lock                        201703L
+# endif
 # if !defined(_LIBCPP_HAS_NO_THREADS)
 #   define __cpp_lib_shared_mutex                       201505L
 # endif
@@ -496,7 +500,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 // # define __cpp_lib_freestanding_optional                202311L
 // # define __cpp_lib_freestanding_string_view             202311L
 // # define __cpp_lib_freestanding_variant                 202311L
-# define __cpp_lib_fstream_native_handle                202306L
+# if !defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   define __cpp_lib_fstream_native_handle              202306L
+# endif
 // # define __cpp_lib_function_ref                         202306L
 // # define __cpp_lib_hazard_pointer                       202306L
 // # define __cpp_lib_linalg                               202311L
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp
@@ -51,7 +51,7 @@
 #   error "__cpp_lib_char8_t should not be defined before c++20"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++17"
 #   endif
@@ -60,7 +60,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -79,7 +79,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++20"
 #   endif
@@ -88,7 +88,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -107,7 +107,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++23"
 #   endif
@@ -116,7 +116,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -135,7 +135,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++26"
 #   endif
@@ -144,7 +144,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp
@@ -56,11 +56,17 @@
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_fstream_native_handle
-#   error "__cpp_lib_fstream_native_handle should be defined in c++26"
-# endif
-# if __cpp_lib_fstream_native_handle != 202306L
-#   error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))
+#   ifndef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should be defined in c++26"
+#   endif
+#   if __cpp_lib_fstream_native_handle != 202306L
+#     error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp
@@ -32,47 +32,77 @@
 
 #elif TEST_STD_VER == 14
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++14"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++14"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 17
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++17"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++17"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 20
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++20"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++20"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 23
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++23"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++23"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++26"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++26"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp
@@ -38,38 +38,62 @@
 
 #elif TEST_STD_VER == 17
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++17"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++17"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 20
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++20"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++20"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 23
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++23"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++23"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++26"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++26"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
