[libc++] Removes Clang-16 support.

[mordante]

With the release of Clang-18 we no longer officially support Clang-16.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Mark de Wever (mordante)

Changes

With the release of Clang-18 we no longer officially support Clang-16.

---

Full diff: https://github.com/llvm/llvm-project/pull/87810.diff

9 Files Affected:

• (modified) libcxx/include/__config (+2-2)
• (modified) libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp (+1-1)
• (modified) libcxx/test/std/ranges/range.utility/range.utility.conv/to_deduction.pass.cpp (+1-1)
• (modified) libcxx/test/std/utilities/format/format.arguments/format.arg/visit.pass.cpp (+1-1)
• (modified) libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp (+1-1)
• (modified) libcxx/test/std/utilities/format/format.arguments/format.arg/visit_format_arg.deprecated.verify.cpp (+1-1)
• (modified) libcxx/test/std/utilities/variant/variant.visit.member/robust_against_adl.pass.cpp (+1-1)
• (modified) libcxx/test/std/utilities/variant/variant.visit.member/visit.pass.cpp (+1-1)
• (modified) libcxx/test/std/utilities/variant/variant.visit.member/visit_return_type.pass.cpp (+1-1)

diff --git a/libcxx/include/__config b/libcxx/include/__config
index 8550b1da4a2787..d98b54926bbe81 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -44,8 +44,8 @@
 // Warn if a compiler version is used that is not supported anymore
 // LLVM RELEASE Update the minimum compiler versions
 #  if defined(_LIBCPP_CLANG_VER)
-#    if _LIBCPP_CLANG_VER < 1600
-#      warning "Libc++ only supports Clang 16 and later"
+#    if _LIBCPP_CLANG_VER < 1700
+#      warning "Libc++ only supports Clang 17 and later"
 #    endif
 #  elif defined(_LIBCPP_APPLE_CLANG_VER)
 #    if _LIBCPP_APPLE_CLANG_VER < 1500
diff --git a/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp b/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
index 479c1b93fcab95..640365889efae6 100644
--- a/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
+++ b/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
@@ -12,7 +12,7 @@
 // UNSUPPORTED: c++03
 
 // TODO: Investigate these failures which break the CI.
-// UNSUPPORTED: clang-16, clang-17, clang-18, clang-19
+// UNSUPPORTED: clang-17, clang-18, clang-19
 
 // TODO: Investigate this failure on GCC 13 (in Ubuntu Jammy)
 // UNSUPPORTED: gcc-13
diff --git a/libcxx/test/std/ranges/range.utility/range.utility.conv/to_deduction.pass.cpp b/libcxx/test/std/ranges/range.utility/range.utility.conv/to_deduction.pass.cpp
index f84cedbc122a1c..58307bd88d0fe9 100644
--- a/libcxx/test/std/ranges/range.utility/range.utility.conv/to_deduction.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.utility.conv/to_deduction.pass.cpp
@@ -9,7 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
 // There is a bug in older versions of Clang that causes trouble with constraints in classes like
 // `ContainerWithDirectCtr`.
-// XFAIL: clang-16, apple-clang-15
+// XFAIL: apple-clang-15
 
 // template<template<class...> class C, input_range R, class... Args>
 //   constexpr auto to(R&& r, Args&&... args);  // Since C++23
diff --git a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.pass.cpp b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.pass.cpp
index 994ccc70a38daa..284b03c32cd094 100644
--- a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.pass.cpp
@@ -8,7 +8,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
 // The tested functionality needs deducing this.
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <format>
diff --git a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp
index b2c40d16045475..4c60cb0e9ae1d7 100644
--- a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp
@@ -8,7 +8,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
 // The tested functionality needs deducing this.
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <format>
diff --git a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit_format_arg.deprecated.verify.cpp b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit_format_arg.deprecated.verify.cpp
index acd9228369e609..6a3896c8965c78 100644
--- a/libcxx/test/std/utilities/format/format.arguments/format.arg/visit_format_arg.deprecated.verify.cpp
+++ b/libcxx/test/std/utilities/format/format.arguments/format.arg/visit_format_arg.deprecated.verify.cpp
@@ -7,7 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <format>
diff --git a/libcxx/test/std/utilities/variant/variant.visit.member/robust_against_adl.pass.cpp b/libcxx/test/std/utilities/variant/variant.visit.member/robust_against_adl.pass.cpp
index c54f2b722d46a9..bea6d949924bd8 100644
--- a/libcxx/test/std/utilities/variant/variant.visit.member/robust_against_adl.pass.cpp
+++ b/libcxx/test/std/utilities/variant/variant.visit.member/robust_against_adl.pass.cpp
@@ -8,7 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // The tested functionality needs deducing this.
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <variant>
diff --git a/libcxx/test/std/utilities/variant/variant.visit.member/visit.pass.cpp b/libcxx/test/std/utilities/variant/variant.visit.member/visit.pass.cpp
index d0c909985bbb37..857e85d00857a0 100644
--- a/libcxx/test/std/utilities/variant/variant.visit.member/visit.pass.cpp
+++ b/libcxx/test/std/utilities/variant/variant.visit.member/visit.pass.cpp
@@ -8,7 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // The tested functionality needs deducing this.
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <variant>
diff --git a/libcxx/test/std/utilities/variant/variant.visit.member/visit_return_type.pass.cpp b/libcxx/test/std/utilities/variant/variant.visit.member/visit_return_type.pass.cpp
index 3312197d8df9c3..2c1cbb06e70677 100644
--- a/libcxx/test/std/utilities/variant/variant.visit.member/visit_return_type.pass.cpp
+++ b/libcxx/test/std/utilities/variant/variant.visit.member/visit_return_type.pass.cpp
@@ -8,7 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
 // The tested functionality needs deducing this.
-// UNSUPPORTED: clang-16 || clang-17
+// UNSUPPORTED: clang-17
 // XFAIL: apple-clang
 
 // <variant>

[ldionne]

LGTM but there's a bit more cleanup we can do!

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.