Keep -Wmaybe-uninitialized disabled

.github/workflows/ci.yml

@@ -20,33 +20,48 @@ jobs:
           - toolset: gcc-4.8
             cxxstd: "03,11"
             os: ubuntu-18.04
-            install: g++-4.8
+            install: g++-4.8-multilib
+            address-model: 32,64
           - toolset: gcc-5
             cxxstd: "03,11,14,1z"
             os: ubuntu-18.04
-            install: g++-5
+            install: g++-5-multilib
+            address-model: 32,64
           - toolset: gcc-6
             cxxstd: "03,11,14,1z"
             os: ubuntu-18.04
-            install: g++-6
+            install: g++-6-multilib
+            address-model: 32,64
           - toolset: gcc-7
             cxxstd: "03,11,14,17"
             os: ubuntu-18.04
+            install: g++-7-multilib
+            address-model: 32,64
           - toolset: gcc-8
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-18.04
-            install: g++-8
+            install: g++-8-multilib
+            address-model: 32,64
           - toolset: gcc-9
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
+            install: g++-9-multilib
+            address-model: 32,64
           - toolset: gcc-10
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
-            install: g++-10
+            install: g++-10-multilib
+            address-model: 32,64
           - toolset: gcc-11
-            cxxstd: "03,11,14,17,2a"
+            cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
-            install: g++-11
+            install: g++-11-multilib
+            address-model: 32,64
+          - toolset: gcc-12
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: g++-12-multilib
+            address-model: 32,64
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"
@@ -92,8 +107,18 @@ jobs:
             os: ubuntu-20.04
           - toolset: clang
             compiler: clang++-12
-            cxxstd: "03,11,14,17,2a"
+            cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-13
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-13
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-14
           - toolset: clang
             cxxstd: "03,11,14,17,2a"
             os: macos-10.15
@@ -137,7 +162,8 @@ jobs:
       - name: Run tests
         run: |
           cd ../boost-root
-          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release
+          export ADDRMD=${{matrix.address-model}}
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} ${ADDRMD:+address-model=$ADDRMD} variant=debug,release
 
   windows:
     strategy:
@@ -145,18 +171,18 @@ jobs:
       matrix:
         include:
           - toolset: msvc-14.0
-            cxxstd: "14"
+            cxxstd: 14,latest
             addrmd: 32,64
             os: windows-2019
-          - toolset: msvc-14.1
-            cxxstd: "14,17,latest"
-            addrmd: 32,64
-            os: windows-2016
           - toolset: msvc-14.2
-            cxxstd: "14,17,latest"
+            cxxstd: "14,17,20,latest"
             addrmd: 32,64
             os: windows-2019
           - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: clang-win
             cxxstd: "14,17,latest"
             addrmd: 32,64
             os: windows-2022
@@ -196,7 +222,7 @@ jobs:
         shell: cmd
         run: |
           cd ../boost-root
-          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
 
   posix-cmake-subdir:
     strategy:

include/boost/function/function_template.hpp

@@ -906,6 +906,10 @@ namespace boost {
             // This warning is technically correct, but we don't want to pay the price for initializing
             // just to silence a warning: https://github.com/boostorg/function/issues/27
 #           pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#           if (BOOST_GCC >= 120000)
+              // GCC 12 emits a different warning: https://github.com/boostorg/function/issues/42
+#             pragma GCC diagnostic ignored "-Wuninitialized"
+#           endif
 #         endif
           std::memcpy(this->functor.data, f.functor.data, sizeof(boost::detail::function::function_buffer));
 #         if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
@@ -1004,20 +1008,24 @@ namespace boost {
               // This warning is technically correct, but we don't want to pay the price for initializing
               // just to silence a warning: https://github.com/boostorg/function/issues/27
 #             pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#             if (BOOST_GCC >= 120000)
+                // GCC 12 emits a different warning: https://github.com/boostorg/function/issues/42
+#               pragma GCC diagnostic ignored "-Wuninitialized"
+#             endif
 #           endif
             std::memcpy(this->functor.data, f.functor.data, sizeof(this->functor.data));
 #           if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
 #             pragma GCC diagnostic pop
 #           endif
           } else
-#if defined(BOOST_GCC) && (__GNUC__ == 11)
+#if defined(BOOST_GCC) && (__GNUC__ >= 11)
 # pragma GCC diagnostic push
-// False positive in GCC 11 for empty function objects (function_n_test.cpp:673)
+// False positive in GCC 11/12 for empty function objects (function_n_test.cpp:673)
 # pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
 #endif
             get_vtable()->base.manager(f.functor, this->functor,
                                      boost::detail::function::move_functor_tag);
-#if defined(BOOST_GCC) && (__GNUC__ == 11)
+#if defined(BOOST_GCC) && (__GNUC__ >= 11)
 # pragma GCC diagnostic pop
 #endif
           f.vtable = 0;

test/Jamfile.v2

@@ -82,3 +82,5 @@ run test_return_function.cpp return_function/<cxxstd>14 : : : <link>shared $(che
 run test_return_function.cpp return_function/<cxxstd>14 : : : <link>static $(check14) : return_function_static_14 ;
 
 run quick.cpp ;
+
+compile issue_42.cpp ;

test/issue_42.cpp

@@ -0,0 +1,21 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// https://github.com/boostorg/function/issues/42
+
+#include <boost/function.hpp>
+
+struct F
+{
+    int operator()( int x ) const { return -x; }
+};
+
+struct X
+{
+    boost::function<int(int)> f_;
+    explicit X( boost::function<int(int)> f ): f_( f ) {}
+};
+
+F f2;
+X x( f2 ); // -Wuninitialized under GCC 12

test/std_bind_cxx98.cpp

@@ -14,6 +14,10 @@
 # endif
 #endif
 
+#if defined(__GNUC__) && __GNUC__ >= 12
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #include <boost/function.hpp>
 #include <iostream>
 #include <functional>

test/std_bind_portable.cpp

@@ -14,6 +14,10 @@
 # endif
 #endif
 
+#if defined(__GNUC__) && __GNUC__ >= 12
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #include <boost/function.hpp>
 #include <iostream>
 #include <functional>