Include Boost as CMake subproject

.github/workflows/windows_clang_debug.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_clang_release.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_debug_vs2019.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_debug_vs2022.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_debug_vs2022_fetch_boost.yml

@@ -11,7 +11,7 @@ on: [pull_request]
 jobs:
   build:
     runs-on: windows-latest
-    
+
     steps:
       - uses: actions/checkout@v4
       - uses: jwlawson/[email protected]
@@ -21,7 +21,7 @@ jobs:
         run: |
           md C:\projects
           $client = new-object System.Net.WebClient
-          $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+          $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
           7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
       - name: Configure
         shell: bash

.github/workflows/windows_debug_vs2022_fetch_hwloc.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_release_2019.yml

@@ -21,7 +21,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_release_2022.yml

@@ -21,7 +21,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

.github/workflows/windows_release_static.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         md C:\projects
         $client = new-object System.Net.WebClient
-        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2022.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
+        $client.DownloadFile("https://rostam.cct.lsu.edu/download/builder/vcpkg-export-hpx-dependencies-2024.7z","C:\projects\vcpkg-export-hpx-dependencies.7z")
         7z x C:\projects\vcpkg-export-hpx-dependencies.7z -y -oC:\projects\vcpkg
     - name: Configure
       shell: bash

cmake/HPX_GeneratePackageUtils.cmake

@@ -242,16 +242,23 @@ function(hpx_sanitize_usage_requirements property is_build)
 
 endfunction(hpx_sanitize_usage_requirements)
 
-function(hpx_filter_cuda_flags cflag_list)
+function(hpx_filter_language_flags cflag_list)
   set(_cflag_list "${${cflag_list}}")
-  string(REGEX REPLACE "\\$<\\$<COMPILE_LANGUAGE:CUDA>:[^>]*>;?" "" _cflag_list
-                       "${_cflag_list}"
+  # We are always in CXX, so replace conditional values with the values
+  # themselves
+  string(REGEX REPLACE "\\$<\\$<COMPILE_LANGUAGE:CXX>:([^>]*)>?" "\\1"
+                       _cflag_list "${_cflag_list}"
   )
+  # Remove conditional values for other languages
+  string(REGEX REPLACE "\\$<\\$<COMPILE_LANGUAGE:[^>]*>:([^>]*)>?" ""
+                       _cflag_list "${_cflag_list}"
+  )
+
   set(${cflag_list}
       ${_cflag_list}
       PARENT_SCOPE
   )
-endfunction(hpx_filter_cuda_flags)
+endfunction(hpx_filter_language_flags)
 
 # Append the corresponding (-D, -I) flags for the compilation
 function(
@@ -383,8 +390,8 @@ function(hpx_generate_pkgconfig_from_target target template is_build)
     hpx_compile_definitions hpx_compile_options hpx_pic_option
     hpx_include_directories hpx_system_include_directories hpx_cflags_list
   )
-  # Cannot generate one file per language yet so filter out cuda
-  hpx_filter_cuda_flags(hpx_cflags_list)
+  # Generator expressions that depend on language must be filtered out
+  hpx_filter_language_flags(hpx_cflags_list)
   hpx_construct_library_list(
     hpx_link_libraries hpx_link_options hpx_library_list
   )

cmake/HPX_SetupBoost.cmake

@@ -1,3 +1,4 @@
+# Copyright (c) 2024 Panos Syskakis
 # Copyright (c) 2018 Christopher Hinz
 # Copyright (c) 2014 Thomas Heller
 # Copyright (c) 2007-2024 The STE||AR-Group
@@ -6,70 +7,6 @@
 # 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)
 
-if(HPX_WITH_FETCH_BOOST)
-  set(HPX_WITH_BOOST_VERSION "1.84.0")
-  hpx_info(
-    "HPX_WITH_FETCH_BOOST=${HPX_WITH_FETCH_BOOST}, Boost v${HPX_WITH_BOOST_VERSION} will be fetched using CMake's FetchContent"
-  )
-  include(FetchContent)
-  fetchcontent_declare(
-    Boost
-    URL https://github.com/boostorg/boost/releases/download/boost-${HPX_WITH_BOOST_VERSION}/boost-${HPX_WITH_BOOST_VERSION}.tar.gz
-    TLS_VERIFY true
-    DOWNLOAD_EXTRACT_TIMESTAMP true
-  )
-  fetchcontent_populate(Boost)
-  set(HPX_WITH_BUILD_FETCHED_BOOST
-      "Execute process"
-      CACHE STRING "Used by command line tool to build fetched Boost"
-  )
-  set(HPX_WITH_BUILD_FETCHED_BOOST_CHECK
-      ""
-      CACHE
-        STRING
-        "for internal use only, do not modify. Checks if fetched Boost is built"
-  )
-
-  if(NOT HPX_WITH_BUILD_FETCHED_BOOST STREQUAL
-     HPX_WITH_BUILD_FETCHED_BOOST_CHECK
-  )
-    if(WIN32)
-      execute_process(
-        COMMAND
-          cmd /C
-          "cd ${CMAKE_BINARY_DIR}\\_deps\\boost-src && .\\bootstrap.bat && .\\b2 headers cxxflags=/std:c++${HPX_CXX_STANDARD}"
-      )
-    elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-      execute_process(
-        COMMAND
-          sh -c
-          "cd ${CMAKE_BINARY_DIR}/_deps/boost-src && ./bootstrap.sh --prefix=${CMAKE_BINARY_DIR}/_deps/boost-installed && ./b2 && ./b2 install --prefix=${CMAKE_BINARY_DIR}/_deps/boost-installed cxxflags=--std=c++${HPX_CXX_STANDARD}"
-      )
-    else()
-      execute_process(
-        COMMAND
-          sh -c
-          "cd ${CMAKE_BINARY_DIR}/_deps/boost-src && ./bootstrap.sh && ./b2 headers cxxflags=--std=c++${HPX_CXX_STANDARD}"
-      )
-    endif()
-    set(HPX_WITH_BUILD_FETCHED_BOOST_CHECK
-        ${HPX_WITH_BUILD_FETCHED_BOOST}
-        CACHE
-          INTERNAL
-          "for internal use only, do not modify. Checks if fetched Boost is built"
-    )
-  endif()
-
-  set(Boost_DIR
-      "${CMAKE_BINARY_DIR}/_deps/boost-src"
-      CACHE INTERNAL ""
-  )
-  set(Boost_INCLUDE_DIR
-      "${CMAKE_BINARY_DIR}/_deps/boost-src"
-      CACHE INTERNAL ""
-  )
-endif()
-
 # In case find_package(HPX) is called multiple times
 if(NOT TARGET hpx_dependencies_boost)
   # We first try to find the required minimum set of Boost libraries. This will
@@ -78,45 +15,7 @@ if(NOT TARGET hpx_dependencies_boost)
     set(Boost_USE_STATIC_LIBS ON)
   endif()
 
-  # Add additional version to recognize
-  # cmake-format: off
-  set(Boost_ADDITIONAL_VERSIONS
-      ${Boost_ADDITIONAL_VERSIONS}
-      "1.85.0" "1.85"
-      "1.84.0" "1.84"
-      "1.83.0" "1.83"
-      "1.82.0" "1.82"
-      "1.81.0" "1.81"
-      "1.80.0" "1.80"
-      "1.79.0" "1.79"
-      "1.78.0" "1.78"
-      "1.77.0" "1.77"
-      "1.76.0" "1.76"
-      "1.75.0" "1.75"
-      "1.74.0" "1.74"
-      "1.73.0" "1.73"
-      "1.72.0" "1.72"
-      "1.71.0" "1.71"
-  )
-  # cmake-format: on
-  set(Boost_MINIMUM_VERSION
-      "1.71"
-      CACHE INTERNAL "1.71" FORCE
-  )
-
-  set(Boost_NO_BOOST_CMAKE ON) # disable the search for boost-cmake
-
-  hpx_set_cmake_policy(CMP0167 OLD) # use CMake's FindBoost for now
-
-  # Find the headers and get the version
-  find_package(Boost ${Boost_MINIMUM_VERSION} NO_POLICY_SCOPE MODULE REQUIRED)
-  if(NOT Boost_VERSION_STRING)
-    set(Boost_VERSION_STRING
-        "${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}"
-    )
-  endif()
-
-  set(__boost_libraries "")
+  # set(__boost_libraries disable_autolinking)
   if(HPX_PARCELPORT_LIBFABRIC_WITH_LOGGING
      OR HPX_PARCELPORT_LIBFABRIC_WITH_DEV_MODE
   )
@@ -141,15 +40,101 @@ if(NOT TARGET hpx_dependencies_boost)
     unset(BOOST_ROOT CACHE)
   endif()
 
-  find_package(
-    Boost ${Boost_MINIMUM_VERSION} NO_POLICY_SCOPE MODULE REQUIRED
-    COMPONENTS ${__boost_libraries}
-  )
+  if((NOT HPX_WITH_FETCH_BOOST) OR HPX_FIND_PACKAGE)
+
+    set(Boost_MINIMUM_VERSION
+        "1.71"
+        CACHE INTERNAL "1.71" FORCE
+    )
 
-  if(NOT Boost_FOUND)
-    hpx_error(
-      "Could not find Boost. Please set Boost_ROOT to point to your Boost installation."
+    find_package(
+      Boost ${Boost_MINIMUM_VERSION} NO_POLICY_SCOPE REQUIRED
+      COMPONENTS ${__boost_libraries} HINTS ${HPX_BOOST_ROOT} $ENV{BOOST_ROOT}
     )
+
+    add_library(hpx_dependencies_boost INTERFACE IMPORTED)
+
+    target_link_libraries(hpx_dependencies_boost INTERFACE Boost::boost)
+
+    foreach(__boost_library ${__boost_libraries})
+      target_link_libraries(
+        hpx_dependencies_boost INTERFACE Boost::${__boost_library}
+      )
+    endforeach()
+
+  elseif(NOT TARGET Boost::boost AND NOT HPX_FIND_PACKAGE)
+    # Fetch Boost using CMake's FetchContent
+
+    if(NOT HPX_WITH_BOOST_VERSION)
+      set(HPX_WITH_BOOST_VERSION "1.86.0")
+    endif()
+
+    hpx_info(
+      "HPX_WITH_FETCH_BOOST=${HPX_WITH_FETCH_BOOST}, Boost v${HPX_WITH_BOOST_VERSION} will be fetched using CMake's FetchContent"
+    )
+
+    include(FetchContent)
+    fetchcontent_declare(
+      Boost
+      URL https://github.com/boostorg/boost/releases/download/boost-${HPX_WITH_BOOST_VERSION}/boost-${HPX_WITH_BOOST_VERSION}-cmake.tar.xz
+      TLS_VERIFY true
+      DOWNLOAD_EXTRACT_TIMESTAMP true
+    )
+
+    # Need to explicitly list header-only dependencies, since Cmake-Boost has
+    # installs each library's headers individually, as opposed to b2-built
+    # Boost.
+    set(__boost_libraries
+        ${__boost_libraries}
+        accumulators
+        bind
+        config
+        exception
+        filesystem
+        functional
+        fusion
+        iostreams
+        log
+        optional
+        parameter
+        phoenix
+        regex
+        spirit
+        variant
+    )
+
+    set(BOOST_INCLUDE_LIBRARIES ${__boost_libraries})
+    set(BOOST_SKIP_INSTALL_RULES OFF)
+
+    fetchcontent_makeavailable(Boost)
+
+    add_library(hpx_dependencies_boost INTERFACE)
+
+    list(TRANSFORM __boost_libraries
+         PREPEND "boost_" OUTPUT_VARIABLE __boost_libraries_prefixed
+    )
+
+    target_link_libraries(
+      hpx_dependencies_boost INTERFACE ${__boost_libraries_prefixed}
+    )
+
+    install(
+      TARGETS hpx_dependencies_boost
+      EXPORT HPXBoostTarget
+      COMPONENT core
+    )
+
+    install(
+      EXPORT HPXBoostTarget
+      FILE HPXBoostTarget.cmake
+      DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${HPX_PACKAGE_NAME}
+    )
+
+    export(
+      TARGETS hpx_dependencies_boost
+      FILE "${CMAKE_CURRENT_BINARY_DIR}/lib/cmake/${HPX_PACKAGE_NAME}/HPXBoostTarget.cmake"
+    )
+
   endif()
 
   # We are assuming that there is only one Boost Root
@@ -163,15 +148,6 @@ if(NOT TARGET hpx_dependencies_boost)
     file(TO_CMAKE_PATH ${Boost_ROOT} Boost_ROOT)
   endif()
 
-  add_library(hpx_dependencies_boost INTERFACE IMPORTED)
-
-  target_link_libraries(hpx_dependencies_boost INTERFACE Boost::boost)
-  foreach(__boost_library ${__boost_libraries})
-    target_link_libraries(
-      hpx_dependencies_boost INTERFACE Boost::${__boost_library}
-    )
-  endforeach()
-
   if(HPX_WITH_HIP AND Boost_VERSION VERSION_LESS 1.78)
     target_compile_definitions(
       hpx_dependencies_boost
@@ -185,11 +161,10 @@ if(NOT TARGET hpx_dependencies_boost)
   if(NOT Boost_USE_STATIC_LIBS)
     hpx_add_config_cond_define(BOOST_ALL_DYN_LINK)
   endif()
+
   if(NOT MSVC)
     hpx_add_config_define(HPX_COROUTINE_NO_SEPARATE_CALL_SITES)
   endif()
+
   hpx_add_config_cond_define(BOOST_BIGINT_HAS_NATIVE_INT64)
-  target_link_libraries(
-    hpx_dependencies_boost INTERFACE Boost::disable_autolinking
-  )
 endif()