Merge pull request #451 from boostorg/issue399

GNU libstdc++3 _GTHREAD_USE_MUTEX_TIMEDLOCK is not used post gcc-6.

.drone.star

@@ -19,16 +19,16 @@ def main(ctx):
   linux_cxx("g++-4.7 03,11", "g++-4.7", packages="g++-4.7", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-4.7', 'CXXSTD': '03,11', }, globalenv=globalenv),
   linux_cxx("g++-4.8 03,11", "g++-4.8", packages="g++-4.8", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-4.8', 'CXXSTD': '03,11', }, globalenv=globalenv),
   linux_cxx("g++-4.9 03,11", "g++-4.9", packages="g++-4.9", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-4.9', 'CXXSTD': '03,11', }, globalenv=globalenv),
-  linux_cxx("g++-5 03,11,14,1z", "g++-5", packages="g++-5", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-5', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  linux_cxx("g++-5 gnu-03,11,14,1z", "g++-5", packages="g++-5", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-5', 'CXXSTD': '03,11,14,1z', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
-  linux_cxx("g++-6 03,11,14,1z", "g++-6", packages="g++-6", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-6', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  linux_cxx("g++-6 gnu++03,11,14,1z Job 9", "g++-6", packages="g++-6", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-6', 'CXXSTD': '03,11,14,1z', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
-  linux_cxx("g++-7 03,11,14,17", "g++-7", packages="g++-7", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-7', 'CXXSTD': '03,11,14,17', }, globalenv=globalenv),
-  linux_cxx("g++-7 gnu++03,11,14,17", "g++-7", packages="g++-7", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-7', 'CXXSTD': '03,11,14,17', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
-  linux_cxx("g++-8 03,11,14,17", "g++-8", packages="g++-8", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-8', 'CXXSTD': '03,11,14,17', }, globalenv=globalenv),
-  linux_cxx("g++-8 gnu++03,11,14,17", "g++-8", packages="g++-8", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-8', 'CXXSTD': '03,11,14,17', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
-  linux_cxx("g++-9 03,11,14,17", "g++-9", packages="g++-9", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-9', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
-  linux_cxx("g++-9 gnu++03,11,14,17", "g++-9", packages="g++-9", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-9', 'CXXSTD': '03,11,14,17,2a', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
+  linux_cxx("g++-5 03,11,14,1z", "g++-5", packages="g++-5", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-5', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
+  linux_cxx("g++-5 gnu-03,11,14,1z", "g++-5", packages="g++-5", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-5', 'CXXSTD': '03,11,14,1z', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
+  linux_cxx("g++-6 03,11,14,1z", "g++-6", packages="g++-6", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-6', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
+  linux_cxx("g++-6 gnu++03,11,14,1z Job 9", "g++-6", packages="g++-6", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-6', 'CXXSTD': '03,11,14,1z', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
+  linux_cxx("g++-7 03,11,14,17", "g++-7", packages="g++-7", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-7', 'CXXSTD': '03,11,14,17', }, globalenv=globalenv),
+  linux_cxx("g++-7 gnu++03,11,14,17", "g++-7", packages="g++-7", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-7', 'CXXSTD': '03,11,14,17', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
+  linux_cxx("g++-8 03,11,14,17", "g++-8", packages="g++-8", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-8', 'CXXSTD': '03,11,14,17', }, globalenv=globalenv),
+  linux_cxx("g++-8 gnu++03,11,14,17", "g++-8", packages="g++-8", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-8', 'CXXSTD': '03,11,14,17', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
+  linux_cxx("g++-9 03,11,14,17", "g++-9", packages="g++-9", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-9', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
+  linux_cxx("g++-9 gnu++03,11,14,17", "g++-9", packages="g++-9", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-9', 'CXXSTD': '03,11,14,17,2a', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
   linux_cxx("g++-10 03,11,14,17,20", "g++-10", packages="g++-10", image="cppalliance/droneubuntu2004:1", buildtype="boost", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-10', 'CXXSTD': '03,11,14,17,20', }, globalenv=globalenv),
   linux_cxx("g++-10 gnu++03,11,14,17,20", "g++-10", packages="g++-10", image="cppalliance/droneubuntu2004:1", buildtype="boost", environment={'TOOLSET': 'gcc', 'COMPILER': 'g++-10', 'CXXSTD': '03,11,14,17,20', 'CXXSTD_DIALECT': 'cxxstd-dialect=gnu', }, globalenv=globalenv),
   linux_cxx("clang++-3.5 03", "clang++", packages="clang-3.5", llvm_os="precise", llvm_ver="3.5", buildtype="boost", image="cppalliance/droneubuntu1404:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-3.5', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
@@ -39,8 +39,8 @@ def main(ctx):
   linux_cxx("clang++-4.0 03", "clang++-4.0", packages="clang-4.0", llvm_os="xenial", llvm_ver="4.0", buildtype="boost", image=linuxglobalimage, environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-4.0', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
   linux_cxx("clang++-5.0 03", "clang++-5.0", packages="clang-5.0", llvm_os="xenial", llvm_ver="5.0", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-5.0', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
   linux_cxx("clang++-6.0 03", "clang++-6.0", packages="clang-6.0", llvm_os="xenial", llvm_ver="6.0", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-6.0', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  linux_cxx("clang++-7 03,11", "clang++-7", packages="clang-7", llvm_os="xenial", llvm_ver="7", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-7', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  linux_cxx("clang++-8 03,11", "clang++-8", packages="clang-8", llvm_os="xenial", llvm_ver="8", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-8', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
+  linux_cxx("clang++-7 03,11,14,17", "clang++-7", packages="clang-7", llvm_os="xenial", llvm_ver="7", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-7', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
+  linux_cxx("clang++-8 03,11,14,17", "clang++-8", packages="clang-8", llvm_os="xenial", llvm_ver="8", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-8', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
   linux_cxx("clang++-9 03,11,14,17,2a", "clang++-9", packages="clang-9", llvm_os="xenial", llvm_ver="9", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-9', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
   linux_cxx("clang++-10 03,11,14,17,20", "clang++-10", packages="clang-10", llvm_os="xenial", llvm_ver="10", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-10', 'CXXSTD': '03,11,14,17,20', }, globalenv=globalenv),
   osx_cxx("XCode-11.7 03,11,17,2a", "clang++", packages="", buildtype="boost", xcode_version="11.7", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       matrix:
         compiler: [ g++-11, g++-12, clang++-14 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -65,7 +65,7 @@ jobs:
       matrix:
         compiler: [ clang++-11, clang++-12, clang++-13 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -109,7 +109,7 @@ jobs:
       matrix:
         compiler: [ g++-9, g++-10, clang++-9, clang++-10 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -146,27 +146,21 @@ jobs:
       - name: Test
         run: ../../../b2 toolset=$TOOLSET cxxstd=03,11,14,17,2a
         working-directory: ../boost-root/libs/config/test
-  ubuntu-bionic:
-    runs-on: ubuntu-18.04
+  macos_11:
+    runs-on: macos-11
     strategy:
       fail-fast: false
       matrix:
-        compiler: [ g++-7, g++-8, clang++-7, clang++-8 ]
+        toolset: [ clang, gcc-11, gcc-10, gcc-9 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
         with:
-          commit-filter: '[skip ci];[ci skip];[CI SKIP];[SKIP CI];***CI SKIP***;***SKIP CI***;[windows];[Windows];[WINDOWS];[apple];[Apple];[APPLE]'
+          commit-filter: '[skip ci];[ci skip];[CI SKIP];[SKIP CI];***CI SKIP***;***SKIP CI***;[windows];[Windows];[WINDOWS];[linux];[Linux];[LINUX]'
           commit-filter-separator: ';'
           fail-fast: true
-      - name: Set TOOLSET
-        run: echo ${{ matrix.compiler }} | awk '/^g/ { print "TOOLSET=gcc" } /^clang/ { print "TOOLSET=clang" }' >> $GITHUB_ENV
-      - name: Add repository
-        run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-      - name: Install packages
-        run: sudo apt install g++-7 g++-8 clang-7 clang-8
       - name: Checkout main boost
         run: git clone -b develop --depth 1 https://github.com/boostorg/boost.git ../boost-root
       - name: Update Dependencies
@@ -181,23 +175,20 @@ jobs:
       - name: Generate headers
         run: ./b2 headers
         working-directory: ../boost-root
-      - name: Generate user config
-        run: 'echo "using $TOOLSET : : ${{ matrix.compiler }} ;" > ~/user-config.jam'
-        working-directory: ../boost-root
-      - name: Config info install
-        run: ../../../b2 print_config_info toolset=$TOOLSET cxxstd=03,11,14,17
+      - name: Config info
+        run: ../../../b2 print_config_info toolset=${{ matrix.toolset }} cxxstd=03,11,14,17,2a
         working-directory: ../boost-root/libs/config/test
       - name: Test
-        run: ../../../b2 toolset=$TOOLSET cxxstd=03,11,14,17
+        run: ../../../b2 toolset=${{ matrix.toolset }} cxxstd=03,11,14,17,2a
         working-directory: ../boost-root/libs/config/test
-  macos:
-    runs-on: macos-latest
+  macos_12:
+    runs-on: macos-12
     strategy:
       fail-fast: false
       matrix:
         toolset: [ clang ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -235,7 +226,7 @@ jobs:
       matrix:
         toolset: [ msvc-14.0 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -273,7 +264,7 @@ jobs:
       matrix:
         toolset: [ msvc-14.2 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -311,7 +302,7 @@ jobs:
       matrix:
         toolset: [ msvc-14.3 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -349,7 +340,7 @@ jobs:
       matrix:
         toolset: [ clang-msvc-14.3 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -384,8 +375,8 @@ jobs:
       matrix:
         qemu_arch: [ aarch64, s390x, ppc64le ]
     steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: uraimo/run-on-arch-action@v2.0.5
+      - uses: actions/checkout@v3
+      - uses: uraimo/run-on-arch-action@v2
         name: Run commands
         id: runcmd
         with:
@@ -420,8 +411,8 @@ jobs:
       matrix:
         qemu_arch: [ aarch64, ppc64le ]
     steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: uraimo/run-on-arch-action@v2.0.5
+      - uses: actions/checkout@v3
+      - uses: uraimo/run-on-arch-action@v2
         name: Run commands
         id: runcmd
         with:
@@ -457,7 +448,7 @@ jobs:
       matrix:
         compiler: [ emcc ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1
@@ -534,7 +525,7 @@ jobs:
       matrix:
         std: [ 11, 14, 17 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - uses: mstachniuk/ci-skip@v1

doc/macro_reference.qbk

@@ -1199,41 +1199,41 @@ struct foo{
 Normally evaluates to nothing, but evaluates to return x; if the compiler
 requires a return, even when it can never be reached.
 ]]
-[[`BOOST_FALLTHROUGH`][ 
-The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through 
-between switch labels: 
-`` 
- switch (x) { 
- case 40: 
- case 41: 
-    if (truth_is_out_there) { 
-       ++x; 
-       BOOST_FALLTHROUGH;  // Use instead of/along with annotations in 
-       // comments. 
-    } else { 
-      return x; 
-    } 
-    case 42: 
-       ... 
-`` 
-As shown in the example above, the BOOST_FALLTHROUGH macro should be 
-followed by a semicolon. It is designed to mimic control-flow statements 
-like 'break;', so it can be placed in most places where 'break;' can, but 
-only if there are no statements on the execution path between it and the 
-next switch label. 
+[[`BOOST_FALLTHROUGH`][
+The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
+between switch labels:
+``
+ switch (x) {
+ case 40:
+ case 41:
+    if (truth_is_out_there) {
+       ++x;
+       BOOST_FALLTHROUGH;  // Use instead of/along with annotations in
+       // comments.
+    } else {
+      return x;
+    }
+    case 42:
+       ...
+``
+As shown in the example above, the BOOST_FALLTHROUGH macro should be
+followed by a semicolon. It is designed to mimic control-flow statements
+like 'break;', so it can be placed in most places where 'break;' can, but
+only if there are no statements on the execution path between it and the
+next switch label.
 
-When compiled with Clang >3.2 in C++11 mode, the BOOST_FALLTHROUGH macro is 
-expanded to `[[clang::fallthrough]]` attribute, which is analysed when 
-performing switch labels fall-through diagnostic ('-Wimplicit-fallthrough'). 
-See clang [@http://clang.llvm.org/docs/LanguageExtensions.html#clang__fallthrough 
-documentation on language extensions for details.] 
+When compiled with Clang >3.2 in C++11 mode, the BOOST_FALLTHROUGH macro is
+expanded to `[[clang::fallthrough]]` attribute, which is analysed when
+performing switch labels fall-through diagnostic ('-Wimplicit-fallthrough').
+See clang [@http://clang.llvm.org/docs/LanguageExtensions.html#clang__fallthrough
+documentation on language extensions for details.]
 
-When used with unsupported compilers, the BOOST_FALLTHROUGH macro has no 
-effect on diagnostics. 
+When used with unsupported compilers, the BOOST_FALLTHROUGH macro has no
+effect on diagnostics.
 
-In either case this macro has no effect on runtime behavior and performance 
-of code. 
-]] 
+In either case this macro has no effect on runtime behavior and performance
+of code.
+]]
 [[`BOOST_EXPLICIT_TEMPLATE_TYPE(t)`
 
   `BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t,v)`
@@ -1405,11 +1405,11 @@ Usage example:
     handle_error("ptr is NULL");
 ``
 ]]
-[[`BOOST_ATTRIBUTE_UNUSED`][Expands to `__attribute__((unused))` when this is available - 
+[[`BOOST_ATTRIBUTE_UNUSED`][Expands to `__attribute__((unused))` when this is available -
 can be used to disable compiler warnings relating to unused types or variables.]]
-[[`BOOST_ATTRIBUTE_NODISCARD`][Expands to `[[nodiscard]]` when this is available - 
+[[`BOOST_ATTRIBUTE_NODISCARD`][Expands to `[[nodiscard]]` when this is available -
 can be used to create a warning when a type or variable is unused.]]
-[[`BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS`][Expands to `[[no_unique_address]]` when this is available - 
+[[`BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS`][Expands to `[[no_unique_address]]` when this is available -
 can be used to indicate that a non-static data member need not have a unique address (for example empty classes).]]
 [[`BOOST_MAY_ALIAS`, `BOOST_NO_MAY_ALIAS`][
 `BOOST_MAY_ALIAS` expands to a type attribute that can be used to mark types that may
@@ -1423,6 +1423,27 @@ Usage example:
   typedef unsigned int BOOST_MAY_ALIAS aliasing_uint;
 ``
 ]]
+[[`BOOST_DEPRECATED(M)`][Expands to an attribute for a symbol that generates warnings when that
+symbol is used in code. The warnings may contain a message `M`, which must be a string literal.
+This attribute may be applied to types, functions or objects and is typically used to mark
+parts of the API as deprecated with a recommendation of replacement.
+
+Example:
+``
+BOOST_DEPRECATED("Use bar() instead.")
+void foo();
+
+template< typename T >
+class BOOST_DEPRECATED("Use std::unique_ptr instead.") auto_ptr
+{
+};
+
+BOOST_DEPRECATED("Use std::numeric_limits<int>::max() instead.")
+const int max_int = 0x7fffffff;
+``
+
+The warnings issued by `BOOST_DEPRECATED` can be suppressed by defining
+`BOOST_ALLOW_DEPRECATED_SYMBOLS` or `BOOST_ALLOW_DEPRECATED` macros.]]
 [[`BOOST_PRAGMA_MESSAGE(M)`][Defined in header `<boost/config/pragma_message.hpp>`,
 this macro expands to the equivalent of `#pragma message(M)`. `M` must be a string
 literal.
@@ -1438,8 +1459,8 @@ this macro issues the message "This header is deprecated. Use `A` instead." via
 
 Example: `BOOST_HEADER_DEPRECATED("<boost/config/workaround.hpp>")`
 
-The messages issued by `BOOST_HEADER_DEPRECATED` can be suppressed by defining the macro
-`BOOST_ALLOW_DEPRECATED_HEADERS`.]]
+The messages issued by `BOOST_HEADER_DEPRECATED` can be suppressed by defining
+`BOOST_ALLOW_DEPRECATED_HEADERS` or `BOOST_ALLOW_DEPRECATED` macros.]]
 ]
 
 [endsect]
@@ -1664,6 +1685,15 @@ export/import of symbols from shared libraries.
 ['Deprecated. This macro is no longer necessary since BOOST_SYMBOL_EXPORT and BOOST_SYMBOL_IMPORT
 are now supplied. It is provided to support legacy code.]
 ]]
+[[`BOOST_DISABLE_EXPLICIT_SYMBOL_VISIBILITY`][
+Disables the effect of the BOOST_SYMBOL_EXPORT, BOOST_SYMBOL_IMPORT and BOOST_SYMBOL_VISIBLE macros, 
+in order to revert to the default compiler behaviour.
+Note that this option should never be used if Boost libraries are being linking against dynamically, 
+or if you are building a shared library that exposes Boost types in its public API. 
+It is however advisable when statically-linking against Boost to prevent Boost symbols from leaking from the binary: 
+for instance because you are building a plug-in for a software which may itself use Boost which could cause 
+ODR conflicts.
+]]
 ]
 
 Typical usage:

include/boost/config/compiler/clang.hpp

@@ -325,11 +325,18 @@
 // All versions with __cplusplus above this value seem to support this:
 #  define BOOST_NO_CXX14_DIGIT_SEPARATORS
 #endif
-//
-// __builtin_unreachable:
-#if defined(__has_builtin) && __has_builtin(__builtin_unreachable)
+
+// Unreachable code markup
+#if defined(__has_builtin)
+#if __has_builtin(__builtin_unreachable)
 #define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
 #endif
+#endif
+
+// Deprecated symbol markup
+#if __has_attribute(deprecated)
+#define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
+#endif
 
 #if (__clang_major__ == 3) && (__clang_minor__ == 0)
 // Apparently a clang bug:

include/boost/config/compiler/clang_version.hpp

@@ -4,14 +4,20 @@
 
 #if !defined(__APPLE__)
 
-# define BOOST_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
+# define BOOST_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__ % 100)
 
 #else
-# define BOOST_CLANG_REPORTED_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
+# define BOOST_CLANG_REPORTED_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__ % 100)
 
 // https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
 
-# if BOOST_CLANG_REPORTED_VERSION >= 130000
+# if BOOST_CLANG_REPORTED_VERSION >= 140000
+#   define BOOST_CLANG_VERSION 140000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 130100
+#   define BOOST_CLANG_VERSION 130000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 130000
 #   define BOOST_CLANG_VERSION 120000
 
 # elif BOOST_CLANG_REPORTED_VERSION >= 120005

include/boost/config/compiler/gcc.hpp

@@ -340,12 +340,18 @@
 // Type aliasing hint. Supported since gcc 3.3.
 #define BOOST_MAY_ALIAS __attribute__((__may_alias__))
 
-//
-// __builtin_unreachable:
+// Unreachable code markup
 #if BOOST_GCC_VERSION >= 40500
 #define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
 #endif
 
+// Deprecated symbol markup
+#if BOOST_GCC_VERSION >= 40500
+#define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
+#else
+#define BOOST_DEPRECATED(msg) __attribute__((deprecated))
+#endif
+
 #ifndef BOOST_COMPILER
 #  define BOOST_COMPILER "GNU C++ version " __VERSION__
 #endif
@@ -359,7 +365,7 @@
 
 // versions check:
 // we don't know gcc prior to version 3.30:
-#if (BOOST_GCC_VERSION< 30300)
+#if (BOOST_GCC_VERSION < 30300)
 #  error "Compiler not configured - please reconfigure"
 #endif
 //

include/boost/config/compiler/sunpro_cc.hpp

@@ -86,6 +86,12 @@
 #  define BOOST_SYMBOL_VISIBLE __global
 #endif
 
+// Deprecated symbol markup
+// Oracle Studio 12.4 supports deprecated attribute with a message; this is the first release that supports the attribute.
+#if (__SUNPRO_CC >= 0x5130)
+#define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
+#endif
+
 #if (__SUNPRO_CC < 0x5130)
 // C++03 features in 12.4:
 #define BOOST_NO_TWO_PHASE_NAME_LOOKUP

include/boost/config/compiler/visualc.hpp

@@ -107,6 +107,14 @@
 #  define BOOST_NO_RTTI
 #endif
 
+// Deprecated symbol markup
+#if (_MSC_VER >= 1400)
+#define BOOST_DEPRECATED(msg) __declspec(deprecated(msg))
+#else
+// MSVC 7.1 only supports the attribute without a message
+#define BOOST_DEPRECATED(msg) __declspec(deprecated)
+#endif
+
 //
 // TR1 features:
 //

include/boost/config/compiler/xlcpp.hpp

@@ -270,6 +270,10 @@
 #  define BOOST_NO_CXX14_DIGIT_SEPARATORS
 #endif
 
+// Deprecated symbol markup
+#if __has_attribute(deprecated)
+#define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
+#endif
 
 // Unused attribute:
 #if defined(__GNUC__) && (__GNUC__ >= 4)

include/boost/config/detail/suffix.hpp

@@ -47,6 +47,22 @@
 # define BOOST_SYMBOL_VISIBLE
 #endif
 
+//
+// disable explicitly enforced visibility
+//
+#if defined(BOOST_DISABLE_EXPLICIT_SYMBOL_VISIBILITY)
+
+#undef BOOST_SYMBOL_EXPORT
+#define BOOST_SYMBOL_EXPORT
+
+#undef BOOST_SYMBOL_IMPORT
+#define BOOST_SYMBOL_IMPORT
+
+#undef BOOST_SYMBOL_VISIBLE
+#define BOOST_SYMBOL_VISIBLE
+
+#endif
+
 //
 // look for long long by looking for the appropriate macros in <limits.h>.
 // Note that we use limits.h rather than climits for maximal portability,
@@ -668,6 +684,23 @@ namespace std{ using ::type_info; }
 #  define BOOST_NORETURN
 #endif
 
+// BOOST_DEPRECATED -------------------------------------------//
+// The macro can be used to mark deprecated symbols, such as functions, objects and types.
+// Any code that uses these symbols will produce warnings, possibly with a message specified
+// as an argument. The warnings can be suppressed by defining BOOST_ALLOW_DEPRECATED_SYMBOLS
+// or BOOST_ALLOW_DEPRECATED.
+#if !defined(BOOST_DEPRECATED) && __cplusplus >= 201402
+#define BOOST_DEPRECATED(msg) [[deprecated(msg)]]
+#endif
+
+#if defined(BOOST_ALLOW_DEPRECATED_SYMBOLS) || defined(BOOST_ALLOW_DEPRECATED)
+#undef BOOST_DEPRECATED
+#endif
+
+#if !defined(BOOST_DEPRECATED)
+#define BOOST_DEPRECATED(msg)
+#endif
+
 // Branch prediction hints
 // These macros are intended to wrap conditional expressions that yield true or false
 //

include/boost/config/header_deprecated.hpp

@@ -17,7 +17,7 @@
 
 #include <boost/config/pragma_message.hpp>
 
-#if defined(BOOST_ALLOW_DEPRECATED_HEADERS)
+#if defined(BOOST_ALLOW_DEPRECATED_HEADERS) || defined(BOOST_ALLOW_DEPRECATED)
 # define BOOST_HEADER_DEPRECATED(a)
 #else
 # define BOOST_HEADER_DEPRECATED(a) BOOST_PRAGMA_MESSAGE("This header is deprecated. Use " a " instead.")

include/boost/config/stdlib/libcpp.hpp

@@ -168,4 +168,13 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+#if _LIBCPP_VERSION >= 15000
+//
+// Unary function is now deprecated in C++11 and later:
+//
+#if __cplusplus >= 201103L
+#define BOOST_NO_CXX98_FUNCTION_BASE
+#endif
+#endif
+
 //  --- end ---

include/boost/config/stdlib/libstdcpp3.hpp

@@ -139,7 +139,9 @@
 //
 #ifdef __clang__
 
-#if __has_include(<source_location>)
+#if __has_include(<expected>)
+#  define BOOST_LIBSTDCXX_VERSION 120100
+#elif __has_include(<source_location>)
 #  define BOOST_LIBSTDCXX_VERSION 110100
 #elif __has_include(<compare>)
 #  define BOOST_LIBSTDCXX_VERSION 100100
@@ -457,7 +459,7 @@ extern "C" char *gets (char *__s);
 #  endif
 #endif
 
-#if (!defined(_GTHREAD_USE_MUTEX_TIMEDLOCK) || (_GTHREAD_USE_MUTEX_TIMEDLOCK == 0)) && !defined(BOOST_NO_CXX11_HDR_MUTEX)
+#if (!defined(_GTHREAD_USE_MUTEX_TIMEDLOCK) || (_GTHREAD_USE_MUTEX_TIMEDLOCK == 0)) && !defined(BOOST_NO_CXX11_HDR_MUTEX) && (__GNUC__ < 6)
 // Timed mutexes are not always available:
 #  define BOOST_NO_CXX11_HDR_MUTEX
 #endif

include/boost/version.hpp

@@ -19,7 +19,7 @@
 //  BOOST_VERSION / 100 % 1000 is the minor version
 //  BOOST_VERSION / 100000 is the major version
 
-#define BOOST_VERSION 108000
+#define BOOST_VERSION 108100
 
 //
 //  BOOST_LIB_VERSION must be defined to be the same as BOOST_VERSION
@@ -27,6 +27,6 @@
 //  number, y is the minor version number, and z is the patch level if not 0.
 //  This is used by <config/auto_link.hpp> to select which library version to link to.
 
-#define BOOST_LIB_VERSION "1_80"
+#define BOOST_LIB_VERSION "1_81"
 
 #endif

test/Jamfile.v2

@@ -84,9 +84,9 @@ test-suite config
      [ run config_info.cpp : : : <test-info>always_show_run_output <threading>single <toolset>msvc:<runtime-link>static <toolset>msvc:<link>static <toolset>msvc:<warnings-as-errors>on <toolset>gcc:<warnings-as-errors>on <toolset>clang:<warnings-as-errors>on ]
      [ run config_info.cpp : : : <test-info>always_show_run_output <threading>multi <toolset>msvc:<warnings-as-errors>on <toolset>gcc:<warnings-as-errors>on <toolset>clang:<warnings-as-errors>on : config_info_threaded ]
      [ run config_info.cpp : : : <test-info>always_show_run_output <rtti>off <toolset>msvc:<warnings-as-errors>on <toolset>gcc:<warnings-as-errors>on <toolset>clang:<warnings-as-errors>on : config_info_no_rtti ]
-     [ run config_info.cpp : : : <test-info>always_show_run_output <exception-handling>off 
-     		<target-os>vxworks:<build>no      
-     		: config_info_no_except ]
+     [ run config_info.cpp : : : <test-info>always_show_run_output <exception-handling>off
+          <target-os>vxworks:<build>no
+          : config_info_no_except ]
      [ run math_info.cpp : : : <test-info>always_show_run_output <toolset>borland:<runtime-link>static <toolset>borland:<link>static ]
      [ run abi/abi_test.cpp abi/main.cpp ]
      [ run limits_test.cpp ]
@@ -113,11 +113,12 @@ test-suite config
     [ run helper_macros_test.cpp ]
     [ compile pragma_message_test.cpp ]
     [ compile header_deprecated_test.cpp ]
+    [ compile symbol_deprecated_test.cpp ]
     [ compile boost_override_test.cpp ]
   ;
 
 obj has_clang_implicit_fallthrough : cmd_line_check.cpp :
-		<toolset>clang:<cxxflags>"-std=c++11 -Wimplicit-fallthrough" <warnings-as-errors>on <warnings>all ;
+    <toolset>clang:<cxxflags>"-std=c++11 -Wimplicit-fallthrough" <warnings-as-errors>on <warnings>all ;
 
 explicit has_clang_implicit_fallthrough ;
 
@@ -128,9 +129,9 @@ explicit math_info_printer ;
 
 actions print-run
 {
-      echo With Standard Version $(STANDARD:E=default)
-      echo =====================================================================
-      $(>)
+    echo With Standard Version $(STANDARD:E=default)
+    echo =====================================================================
+    $(>)
 }
 
 rule print-run ( target : sources * : properties * )
@@ -147,4 +148,3 @@ explicit print_math_info ;
 exe config_info_travis : config_info.cpp ;
 install config_info_travis_install : config_info_travis : <location>. ;
 explicit config_info_travis_install ;
-

test/symbol_deprecated_test.cpp

@@ -0,0 +1,19 @@
+//  Copyright 2022 Andrey Semashev.
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+
+BOOST_DEPRECATED("Use bar() instead.")
+void foo();
+
+template< typename T >
+class BOOST_DEPRECATED("Use std::unique_ptr instead.") my_auto_ptr
+{
+};
+
+BOOST_DEPRECATED("Use std::numeric_limits<int>::max() instead.")
+const int max_int = 0x7fffffff;