[libc++] Build with -fsized-deallocation (#96217)

This patch makes libc++ build with -fsized-deallocation. That flag is
enabled by default in recent versions of Clang, so this patch will make
libc++ forward-compatible with ToT Clang.

6 files changed, 14 insertions, 5 deletions

diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index 4b92701..e098bd5 100644
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -553,6 +553,10 @@ function(cxx_add_basic_build_flags target)
     target_add_compile_flags_if_supported(${target} PRIVATE -fvisibility=hidden)
   endif()
 
+  # Build with -fsized-deallocation, which is default in recent versions of Clang.
+  # TODO(LLVM 21): This can be dropped once we only support Clang >= 19.
+  target_add_compile_flags_if_supported(${target} PRIVATE -fsized-deallocation)
+
   # Let the library headers know they are currently being used to build the
   # library.
   target_compile_definitions(${target} PRIVATE -D_LIBCPP_BUILDING_LIBRARY)
diff --git a/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
index 7e223e6..033d9f9 100644
--- a/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -2022,7 +2022,8 @@
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvmSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnamSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znwm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
diff --git a/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
index 407d045..332d8ab 100644
--- a/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -2022,7 +2022,8 @@
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
-{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvmSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnamSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znwm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
diff --git a/libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist
index 4022339..3458b33 100644
--- a/libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -39,7 +39,8 @@
 {'is_defined': False, 'name': '_ZdaPv', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdlPv', 'type': 'FUNC'}
-{'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvm', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvmSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znam', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZnamSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znwm', 'type': 'FUNC'}
diff --git a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
index 574c450..bdf90ba 100644
--- a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -39,7 +39,8 @@
 {'is_defined': False, 'name': '_ZdaPv', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdlPv', 'type': 'FUNC'}
-{'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvm', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvmSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znam', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZnamSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znwm', 'type': 'FUNC'}
diff --git a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
index 6655466..ac3cc12 100644
--- a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
@@ -18,7 +18,8 @@
 {'is_defined': False, 'name': '_ZdaPv', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZdlPv', 'type': 'FUNC'}
-{'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvm', 'type': 'FUNC'}
+{'is_defined': False, 'name': '_ZdlPvmSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znam', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_ZnamSt11align_val_t', 'type': 'FUNC'}
 {'is_defined': False, 'name': '_Znwm', 'type': 'FUNC'}