From 2182a2eaa2c58291737dbe5fb9418525bb81fe95 Mon Sep 17 00:00:00 2001
From: panyfx <8242454+panyfx@user.noreply.gitee.com>
Date: Tue, 6 Oct 2026 09:48:49 +0800
Subject: [PATCH 1/2] Fix GCC 16 compile Error: 1.The -D__STRICT_ANSI__ in
 CMakeLists.txt conflicts with libstdc++ 16's __int128 specialization    2.
 H2StreamContext is incomplete, so sizeof throws an error, causing      
 unique_ptr to fail

---
 CMakeLists.txt                         | 14 +++++++++++++-
 src/brpc/policy/http2_rpc_protocol.cpp | 16 ++++++++++++++++
 src/brpc/policy/http2_rpc_protocol.h   | 16 ++--------------
 3 files changed, 31 insertions(+), 15 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f9e1aa8fc3..cb3398b435 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -191,9 +191,21 @@ list(APPEND BRPC_COMMON_DEFINITIONS
     __STDC_FORMAT_MACROS
     __STDC_LIMIT_MACROS
     __STDC_CONSTANT_MACROS
-    __STRICT_ANSI__
 )
 
+# __STRICT_ANSI__ hides GNU extensions, but it conflicts with the __int128
+# specializations added in libstdc++ 16 (GCC 16), causing "redefinition of
+# numeric_limits<__int128>". Probe support at configure time and only define
+# it when it does not break compilation.
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_DEFINITIONS "-D__STRICT_ANSI__")
+check_cxx_source_compiles("#include <limits>\nint main() { return 0; }"
+    BRPC_STRICT_ANSI_COMPILES)
+unset(CMAKE_REQUIRED_DEFINITIONS)
+if(BRPC_STRICT_ANSI_COMPILES)
+    list(APPEND BRPC_COMMON_DEFINITIONS __STRICT_ANSI__)
+endif()
+
 if(WITH_ASAN)
     list(APPEND BRPC_COMMON_COMPILE_OPTIONS -fsanitize=address)
     list(APPEND BRPC_COMMON_LINK_OPTIONS -fsanitize=address)
diff --git a/src/brpc/policy/http2_rpc_protocol.cpp b/src/brpc/policy/http2_rpc_protocol.cpp
index 6d9b2b8714..060b25faf1 100644
--- a/src/brpc/policy/http2_rpc_protocol.cpp
+++ b/src/brpc/policy/http2_rpc_protocol.cpp
@@ -1683,6 +1683,22 @@ bool H2Context::FlushPendingData(int stream_id) {
     return out.empty() || WriteAck(_socket, &out) == 0;
 }
 
+H2UnsentRequest::H2UnsentRequest(Controller* c)
+    : _nref(1)
+    , _size(0)
+    , _stream_id(0)
+    , _cntl(c) {
+#ifndef NDEBUG
+    get_h2_bvars()->h2_unsent_request_count << 1;
+#endif
+}
+
+H2UnsentRequest::~H2UnsentRequest() {
+#ifndef NDEBUG
+    get_h2_bvars()->h2_unsent_request_count << -1;
+#endif
+}
+
 H2UnsentRequest* H2UnsentRequest::New(Controller* c) {
     const HttpHeader& h = c->http_request();
     const CommonStrings* const common = get_common_strings();
diff --git a/src/brpc/policy/http2_rpc_protocol.h b/src/brpc/policy/http2_rpc_protocol.h
index 64c9864d68..b82dd93f55 100644
--- a/src/brpc/policy/http2_rpc_protocol.h
+++ b/src/brpc/policy/http2_rpc_protocol.h
@@ -165,20 +165,8 @@ friend void PackH2Request(butil::IOBuf*, SocketMessage**,
     void push(const std::string& name, const std::string& value)
     { new (&_list[_size++]) HPacker::Header(name, value); }
 
-    H2UnsentRequest(Controller* c)
-        : _nref(1)
-        , _size(0)
-        , _stream_id(0)
-        , _cntl(c) {
-#ifndef NDEBUG
-        get_h2_bvars()->h2_unsent_request_count << 1;
-#endif
-    }
-    ~H2UnsentRequest() {
-#ifndef NDEBUG
-        get_h2_bvars()->h2_unsent_request_count << -1;
-#endif
-    }
+    H2UnsentRequest(Controller* c);
+    ~H2UnsentRequest();
     H2UnsentRequest(const H2UnsentRequest&);
     void operator=(const H2UnsentRequest&);
     void Destroy();

From c2170d4eb38f7fc4b36cf564c44e2a0eacb18f24 Mon Sep 17 00:00:00 2001
From: pynj2026 <159674473+pynj2026@users.noreply.github.com>
Date: Tue, 6 Oct 2026 14:33:27 +0800
Subject: [PATCH 2/2] Fix GCC 16 compile Error: 1. Remove __STRICT_ANSI__
 definition instead of probing it

---
 CMakeLists.txt | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb3398b435..e98e0c4fa0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -193,19 +193,6 @@ list(APPEND BRPC_COMMON_DEFINITIONS
     __STDC_CONSTANT_MACROS
 )
 
-# __STRICT_ANSI__ hides GNU extensions, but it conflicts with the __int128
-# specializations added in libstdc++ 16 (GCC 16), causing "redefinition of
-# numeric_limits<__int128>". Probe support at configure time and only define
-# it when it does not break compilation.
-include(CheckCXXSourceCompiles)
-set(CMAKE_REQUIRED_DEFINITIONS "-D__STRICT_ANSI__")
-check_cxx_source_compiles("#include <limits>\nint main() { return 0; }"
-    BRPC_STRICT_ANSI_COMPILES)
-unset(CMAKE_REQUIRED_DEFINITIONS)
-if(BRPC_STRICT_ANSI_COMPILES)
-    list(APPEND BRPC_COMMON_DEFINITIONS __STRICT_ANSI__)
-endif()
-
 if(WITH_ASAN)
     list(APPEND BRPC_COMMON_COMPILE_OPTIONS -fsanitize=address)
     list(APPEND BRPC_COMMON_LINK_OPTIONS -fsanitize=address)