[boost] Enable Boost building with wasm32-emscripten

ports/boost-locale/allow-force-finding-iconv.patch

@@ -0,0 +1,24 @@
+diff --git a/libs/locale/build/Jamfile.v2 b/libs/locale/build/Jamfile.v2
+index 88a8cb1..e6a6b7f 100644
+--- a/build/Jamfile.v2
++++ b/build/Jamfile.v2
+@@ -17,6 +17,7 @@ import feature ;
+ # Features
+
+ feature.feature boost.locale.iconv : on off : optional propagated ;
++feature.feature boost.locale.force-found-iconv : on off : optional propagated ;
+ feature.feature boost.locale.icu : on off :  optional propagated ;
+ feature.feature boost.locale.posix : on off : optional propagated ;
+ feature.feature boost.locale.std : on off : optional propagated ;
+@@ -164,6 +164,11 @@     local flags-result ;
+
+     local found-iconv ;
+
++    if <boost.locale.force-found-iconv>on in $(properties)
++    {
++        found-iconv = true ;
++    }
++    
+     if <boost.locale.iconv>on in $(properties)
+       || ! <boost.locale.iconv> in $(properties:G) 
+         && ! <target-os>solaris in $(properties)

ports/boost-locale/b2-options.cmake

@@ -22,4 +22,9 @@ else()
         boost.locale.icu=off
         -sICONV_PATH=${LIBICONV_DIR}
     )
-endif()
+    if(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Emscripten" OR VCPKG_TARGET_ARCHITECTURE STREQUAL "wasm32")
+        list(APPEND B2_OPTIONS
+            boost.locale.force-found-iconv=on
+        )
+    endif()
+endif()

ports/boost-locale/portfile.cmake

@@ -6,7 +6,7 @@ vcpkg_from_github(
     REF boost-1.73.0
     SHA512 0af88d8db7b18395a2b3668bcb51a5f32cd0de9acb9633572c2fb7edcdf06f354802392606394cf75ec4fd4d9cfe5c96351db766e55f8ef30f746b0a7017ad1f
     HEAD_REF master
-    PATCHES 0001-Fix-boost-ICU-support.patch
+    PATCHES "0001-Fix-boost-ICU-support.patch" "allow-force-finding-iconv.patch"
 )
 
 include(${CURRENT_INSTALLED_DIR}/share/boost-build/boost-modular-build.cmake)

ports/boost/CONTROL

@@ -4,7 +4,7 @@ Version: 1.73.0
 Port-Version: 3
 Homepage: https://boost.org
 Description: Peer-reviewed portable C++ source libraries
-Build-Depends: boost-accumulators, boost-algorithm, boost-align, boost-any, boost-array, boost-asio, boost-assert, boost-assign, boost-atomic, boost-beast, boost-bimap, boost-bind, boost-callable-traits, boost-chrono, boost-circular-buffer, boost-compatibility, boost-compute, boost-concept-check, boost-config, boost-container, boost-container-hash, boost-context (!uwp), boost-contract, boost-conversion, boost-convert, boost-core, boost-coroutine (!arm&!uwp), boost-coroutine2, boost-crc, boost-date-time, boost-detail, boost-dll, boost-dynamic-bitset, boost-endian, boost-exception, boost-fiber (!osx&!uwp&!arm), boost-filesystem (!uwp), boost-flyweight, boost-foreach, boost-format, boost-function, boost-functional, boost-function-types, boost-fusion, boost-geometry, boost-gil, boost-graph, boost-graph-parallel, boost-hana, boost-heap, boost-histogram, boost-hof, boost-icl, boost-integer, boost-interprocess, boost-intrusive, boost-io, boost-iostreams (!uwp), boost-iterator, boost-lambda, boost-lexical-cast, boost-locale (!uwp), boost-local-function, boost-lockfree, boost-log (!uwp), boost-logic, boost-math, boost-metaparse, boost-move, boost-mp11, boost-mpl, boost-msm, boost-multiprecision, boost-multi-array, boost-multi-index, boost-nowide, boost-numeric-conversion, boost-interval, boost-odeint, boost-ublas, boost-safe-numerics, boost-optional, boost-outcome, boost-parameter, boost-parameter-python, boost-phoenix, boost-polygon, boost-poly-collection, boost-pool, boost-predef, boost-preprocessor, boost-process, boost-program-options, boost-property-map, boost-property-tree, boost-proto, boost-ptr-container, boost-python (!uwp&!(arm&windows)), boost-qvm, boost-random, boost-range, boost-ratio, boost-rational, boost-regex, boost-numeric-conversion, boost-interval, boost-odeint, boost-ublas, boost-safe-numerics, boost-scope-exit, boost-serialization, boost-signals2, boost-smart-ptr, boost-sort, boost-spirit, boost-stacktrace (!uwp), boost-statechart, boost-static-assert, boost-static-string, boost-system, boost-test (!uwp), boost-thread, boost-throw-exception, boost-timer, boost-tokenizer, boost-tti, boost-tuple, boost-typeof, boost-type-erasure, boost-type-index, boost-type-traits, boost-units, boost-unordered, boost-utility, boost-uuid, boost-variant, boost-variant2, boost-vmd, boost-wave (!uwp), boost-winapi, boost-xpressive, boost-yap
+Build-Depends: boost-accumulators, boost-algorithm, boost-align, boost-any, boost-array, boost-asio (!emscripten), boost-assert, boost-assign, boost-atomic, boost-beast (!emscripten), boost-bimap, boost-bind, boost-callable-traits, boost-chrono, boost-circular-buffer, boost-compatibility, boost-compute, boost-concept-check, boost-config, boost-container, boost-container-hash, boost-context (!uwp&!emscripten), boost-contract, boost-conversion, boost-convert, boost-core, boost-coroutine (!arm&!uwp&!emscripten), boost-coroutine2 (!emscripten), boost-crc, boost-date-time, boost-detail, boost-dll, boost-dynamic-bitset, boost-endian, boost-exception, boost-fiber (!osx&!uwp&!arm&!emscripten), boost-filesystem (!uwp), boost-flyweight, boost-foreach, boost-format, boost-function, boost-functional, boost-function-types, boost-fusion, boost-geometry, boost-gil, boost-graph, boost-graph-parallel, boost-hana, boost-heap, boost-histogram, boost-hof, boost-icl, boost-integer, boost-interprocess, boost-intrusive, boost-io, boost-iostreams (!uwp), boost-iterator, boost-lambda, boost-lexical-cast, boost-locale (!uwp), boost-local-function, boost-lockfree, boost-log (!uwp&!emscripten), boost-logic, boost-math, boost-metaparse, boost-move, boost-mp11, boost-mpl, boost-msm, boost-multiprecision, boost-multi-array, boost-multi-index, boost-nowide, boost-numeric-conversion, boost-interval, boost-odeint, boost-ublas, boost-safe-numerics, boost-optional, boost-outcome, boost-parameter, boost-parameter-python (!emscripten), boost-phoenix, boost-polygon, boost-poly-collection, boost-pool, boost-predef, boost-preprocessor, boost-process (!emscripten), boost-program-options, boost-property-map, boost-property-tree, boost-proto, boost-ptr-container, boost-python (!uwp&!(arm&windows)&!emscripten), boost-qvm, boost-random, boost-range, boost-ratio, boost-rational, boost-regex, boost-numeric-conversion, boost-interval, boost-odeint, boost-ublas, boost-safe-numerics, boost-scope-exit, boost-serialization, boost-signals2, boost-smart-ptr, boost-sort, boost-spirit, boost-stacktrace (!uwp), boost-statechart, boost-static-assert, boost-static-string, boost-system, boost-test (!uwp), boost-thread, boost-throw-exception, boost-timer, boost-tokenizer, boost-tti, boost-tuple, boost-typeof, boost-type-erasure, boost-type-index, boost-type-traits, boost-units, boost-unordered, boost-utility, boost-uuid, boost-variant, boost-variant2, boost-vmd, boost-wave (!uwp), boost-winapi, boost-xpressive, boost-yap
 
 
 Feature: mpi