From 7de951110a42d5dad535e793d1ba168a0c9fd161 Mon Sep 17 00:00:00 2001
From: Aliaksei Kandratsenka <alkondratenko@gmail.com>
Date: Sun, 1 Feb 2026 15:45:54 -0500
Subject: [PATCH] unbreak compilation with GCC 14

With previous code gcc ended up giving odd error about section
mismatch for kInvalidSpan. Not sure what it was, but kInvalidSpan is
only used for it's address. So there is never need for constexpr
it. This change turns it into "classic" constant which is declared in
the header and defined in the .cc (with whatever section attribute it
needs).
---
 tcmalloc/static_vars.cc | 2 +-
 tcmalloc/static_vars.h  | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/tcmalloc/static_vars.cc b/tcmalloc/static_vars.cc
index f4c9e8a47..33c14c7f9 100644
--- a/tcmalloc/static_vars.cc
+++ b/tcmalloc/static_vars.cc
@@ -114,7 +114,7 @@ TCMALLOC_ATTRIBUTE_NO_DESTROY ABSL_CONST_INIT SystemAllocator<
 // section automatically, even though we will never mutate this particular
 // instance.
 ABSL_ATTRIBUTE_SECTION_VARIABLE(.data.rel.ro)
-constexpr Span Static::kInvalidSpan;
+const Span Static::kInvalidSpan = {};
 // LINT.ThenChange(:static_vars_size)
 
 ABSL_CONST_INIT Static tc_globals;
diff --git a/tcmalloc/static_vars.h b/tcmalloc/static_vars.h
index f66fc40a8..8d9710310 100644
--- a/tcmalloc/static_vars.h
+++ b/tcmalloc/static_vars.h
@@ -256,8 +256,7 @@ class Static final {
       NumaTopology<kNumaPartitions, kNumBaseClasses>, kNormalPartitions>
       system_allocator_;
 
-  static ABSL_ATTRIBUTE_SECTION_VARIABLE(.data.rel.ro) constexpr Span
-      kInvalidSpan{};
+  static const Span kInvalidSpan;
 
   // Manages sampled allocations and allows iteration over samples free from the
   // global pageheap_lock.