Upgrade external/boost to latest Boost 1.76.0

*  <https://dev-www.libreoffice.org/src/boost_1_76_0.tar.xz> has been generated
(on Fedora 34) with

> $ wget https://boostorg.jfrog.io/native/main/release/1.76.0/source/boost_1_76_0.tar.bz2
> $ printf 'f0397ba6e982c4450f27bf32a2a83292aba035b827a5623a14636ea583318c41 boost_1_76_0.tar.bz2' | sha256sum -c # cf. <https://www.boost.org/users/history/version_1_76_0.html>
> boost_1_76_0.tar.bz2: OK
> $ external/boost/repack_tarball.sh boost_1_76_0.tar.bz2
> Unpacking boost_1_76_0.tar.bz2 ...
> Removing unnecessary files ...
> Creating boost_1_76_0.tar.xz ...
> Cleaning up ...
> adfa0ca971c56006a8304b6146d1382e6369815d568f6e6a7440fe29995d51b8  boost_1_76_0.tar.xz
> Done.

*  external/boost/0001-Fix-include-inside-boost-namespace.patch.2 is necessary
to fix

> checking for boost/math/constants/constants.hpp... no
> configure: error: Required boost headers not found.
> make[1]: *** [external/libzmf/ExternalProject_libzmf.mk:28: workdir/ExternalProject/libzmf/build] Error 1

with recent libstdc++ 12 trunk (presumably since
<https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=261d5a4a459bd49942e53bc83334ccc7154a09d5>
"libstdc++: Reduce header dependencies on <array> and <utility>", and with other
standard libraries <utility> was likely already included indirectly earlier, so
the include nested in namespace boost::math::tools::meta_programming in the
middle of workdir/UnpackedTarball/boost/boost/math/tools/mp.hpp didn't cause
harm).

Change-Id: I1eee23915fea48bbb383cbeefc4ddfdeaac63e14
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120253
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

4 files changed, 39 insertions, 54 deletions

diff --git a/external/boost/0001-Fix-include-inside-boost-namespace.patch.2 b/external/boost/0001-Fix-include-inside-boost-namespace.patch.2
new file mode 100644
index 000000000000..ce123dbb4453
--- /dev/null
+++ b/external/boost/0001-Fix-include-inside-boost-namespace.patch.2
@@ -0,0 +1,33 @@
+From 1ec5c98d80de97f9e962c5627e1a0e6096099894 Mon Sep 17 00:00:00 2001
+From: Daniel Scharrer <daniel@constexpr.org>
+Date: Wed, 28 Jul 2021 19:56:31 +0200
+Subject: [PATCH] Fix #include inside boost namespace
+
+The existing code fails to build if <utility> was not already included.
+---
+ include/boost/math/tools/mp.hpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/boost/math/tools/mp.hpp b/include/boost/math/tools/mp.hpp
+index 35565646f..dc8440988 100644
+--- a/include/boost/math/tools/mp.hpp
++++ b/include/boost/math/tools/mp.hpp
+@@ -13,6 +13,7 @@
+ 
+ #include <type_traits>
+ #include <cstddef>
++#include <utility>
+ 
+ namespace boost { namespace math { namespace tools { namespace meta_programming {
+ 
+@@ -338,7 +339,6 @@ using mp_remove_if_q = mp_remove_if<L, Q::template fn>;
+ // Index sequence
+ // Use C++14 index sequence if available
+ #if defined(__cpp_lib_integer_sequence) && (__cpp_lib_integer_sequence >= 201304)
+-#include <utility>
+ template<std::size_t... I>
+ using index_sequence = std::index_sequence<I...>;
+ 
+-- 
+2.31.1
+
diff --git a/external/boost/0001-Fix-usage-of-deprecated-Boost.Bind-features.patch.2 b/external/boost/0001-Fix-usage-of-deprecated-Boost.Bind-features.patch.2
deleted file mode 100644
index 583a9d905214..000000000000
--- a/external/boost/0001-Fix-usage-of-deprecated-Boost.Bind-features.patch.2
+++ /dev/null
@@ -1,48 +0,0 @@
-From d1c8825a45a0717e1ad79583d3283b0e5e32831e Mon Sep 17 00:00:00 2001
-From: Andrey Semashev <Lastique@users.noreply.github.com>
-Date: Tue, 28 Apr 2020 22:03:04 +0300
-Subject: [PATCH] Fix usage of deprecated Boost.Bind features
-
-This fixes deprecation warnings generated by boost/bind.hpp.
-
-Also, use a more actual include path for ref.hpp.
----
- include/boost/property_tree/json_parser/detail/parser.hpp | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/include/boost/property_tree/json_parser/detail/parser.hpp b/include/boost/property_tree/json_parser/detail/parser.hpp
-index 5554990..6cf6363 100644
---- a/include/boost/property_tree/json_parser/detail/parser.hpp
-+++ b/include/boost/property_tree/json_parser/detail/parser.hpp
-@@ -3,8 +3,8 @@
- 
- #include <boost/property_tree/json_parser/error.hpp>
- 
--#include <boost/ref.hpp>
--#include <boost/bind.hpp>
-+#include <boost/core/ref.hpp>
-+#include <boost/bind/bind.hpp>
- #include <boost/format.hpp>
- 
- #include <iterator>
-@@ -214,7 +214,7 @@ namespace boost { namespace property_tree {
-         void process_codepoint(Sentinel end, EncodingErrorFn error_fn) {
-             encoding.transcode_codepoint(cur, end,
-                 boost::bind(&Callbacks::on_code_unit,
--                            boost::ref(callbacks), _1),
-+                            boost::ref(callbacks), boost::placeholders::_1),
-                 error_fn);
-         }
- 
-@@ -517,7 +517,7 @@ namespace boost { namespace property_tree {
-         void feed(unsigned codepoint) {
-             encoding.feed_codepoint(codepoint,
-                                     boost::bind(&Callbacks::on_code_unit,
--                                                boost::ref(callbacks), _1));
-+                                                boost::ref(callbacks), boost::placeholders::_1));
-         }
- 
-         Callbacks& callbacks;
--- 
-2.29.2
-
diff --git a/external/boost/UnpackedTarball_boost.mk b/external/boost/UnpackedTarball_boost.mk
index c10ed5a55048..5a4607b77bec 100644
--- a/external/boost/UnpackedTarball_boost.mk
+++ b/external/boost/UnpackedTarball_boost.mk
@@ -35,8 +35,8 @@ boost_patches += windows-no-utf8-locales.patch.0
 
 boost_patches += msvc2017.patch.0
 
-# Included in boost-1.76.0:
-boost_patches += 0001-Fix-usage-of-deprecated-Boost.Bind-features.patch.2
+# From upstream develop branch:
+boost_patches += 0001-Fix-include-inside-boost-namespace.patch.2
 
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,boost))
 
diff --git a/external/boost/boost_1_63_0.undef.warning.patch.1 b/external/boost/boost_1_63_0.undef.warning.patch.1
index 2773138e2765..cdf0d820e203 100644
--- a/external/boost/boost_1_63_0.undef.warning.patch.1
+++ b/external/boost/boost_1_63_0.undef.warning.patch.1
@@ -2,11 +2,11 @@ diff -up boost/boost/math/special_functions/fpclassify.hpp.dt boost/boost/math/s
 --- boost/boost/math/special_functions/fpclassify.hpp.dt	2017-02-03 07:59:18.805415876 +0100
 +++ boost/boost/math/special_functions/fpclassify.hpp	2017-02-03 08:00:45.046494362 +0100
 @@ -134,7 +134,7 @@ inline bool is_nan_helper(T, const boost
- inline bool is_nan_helper(__float128 f, const boost::true_type&) { return ::isnanq(f); }
- inline bool is_nan_helper(__float128 f, const boost::false_type&) { return ::isnanq(f); }
+ inline bool is_nan_helper(__float128 f, const std::true_type&) { return ::isnanq(f); }
+ inline bool is_nan_helper(__float128 f, const std::false_type&) { return ::isnanq(f); }
  #elif defined(BOOST_GNU_STDLIB) && BOOST_GNU_STDLIB && \
 -      _GLIBCXX_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC
 +      _GLIBCXX_USE_C99_MATH && (!defined(_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC) || !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC)
- inline bool is_nan_helper(__float128 f, const boost::true_type&) { return std::isnan(static_cast<double>(f)); }
- inline bool is_nan_helper(__float128 f, const boost::false_type&) { return std::isnan(static_cast<double>(f)); }
+ inline bool is_nan_helper(__float128 f, const std::true_type&) { return std::isnan(static_cast<double>(f)); }
+ inline bool is_nan_helper(__float128 f, const std::false_type&) { return std::isnan(static_cast<double>(f)); }
  #else