cmake: require just 2 boost component by default program_options, regex

Tested locally that build succeeds with all other components being
header-only or unused by now.

`regex` is only needed for Boost <1.76, see
https://www.boost.org/releases/1.76.0/

.github/workflows/ci-ifcwrap-standalone.yml

@@ -37,13 +37,9 @@ jobs:
             bison \
             gcc \
             g++ \
-            libboost-date-time-dev \
-            libboost-filesystem-dev \
             libboost-iostreams-dev \
             libboost-program-options-dev \
             libboost-regex-dev \
-            libboost-system-dev \
-            libboost-thread-dev \
             libeigen3-dev \
             libocct-data-exchange-dev \
             libocct-draw-dev \

.github/workflows/ci.yml

@@ -80,13 +80,9 @@ jobs:
 
           sudo apt-get install --no-install-recommends \
           git cmake gcc g++ \
-          libboost-date-time-dev \
-          libboost-filesystem-dev \
           libboost-iostreams-dev \
           libboost-program-options-dev \
           libboost-regex-dev \
-          libboost-system-dev \
-          libboost-thread-dev \
           libpcre3-dev libxml2-dev \
           libtbb-dev nlohmann-json3-dev \
           libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev libocct-ocaf-dev libocct-visualization-dev libocct-data-exchange-dev \

.github/workflows/release.yml

@@ -25,13 +25,9 @@ jobs:
           sudo apt update
           sudo apt-get install --no-install-recommends \
           git cmake gcc g++ \
-          libboost-date-time-dev \
-          libboost-filesystem-dev \
           libboost-iostreams-dev \
           libboost-program-options-dev \
           libboost-regex-dev \
-          libboost-system-dev \
-          libboost-thread-dev \
           python3-all-dev python3-pip \
           swig libpcre3-dev libxml2-dev \
           libtbb-dev nlohmann-json3-dev \

cmake/CMakeLists.txt

@@ -373,10 +373,12 @@ endif()
 if(WASM_BUILD)
     set(BOOST_COMPONENTS)
 else()
-    # @todo review this, shouldn't this be all possible header-only now?
-    # ... or rewritten using C++17 features?
-    # set(BOOST_COMPONENTS system program_options regex thread date_time iostreams)
-    set(BOOST_COMPONENTS program_options regex thread date_time iostreams)
+    set(BOOST_COMPONENTS "")
+    if(BUILD_IFCGEOM OR BUILD_CONVERT)
+        # TODO: drop `regex` once BOOST_MIN_VERSION >= 1.76, where its matcher engine
+        # became header-only (boostorg/regex@49e8067b) and no longer needs linking.
+        set(BOOST_COMPONENTS ${BOOST_COMPONENTS} program_options regex)
+    endif()
 endif()
 
 if(USE_MMAP)
@@ -389,6 +391,10 @@ if(USE_MMAP)
 endif()
 
 find_package(Boost REQUIRED COMPONENTS ${BOOST_COMPONENTS})
+# TODO: drop this whole `if` (and the `regex` component above) once BOOST_MIN_VERSION >= 1.76.
+if(Boost_VERSION VERSION_GREATER_EQUAL 1.76)
+    list(REMOVE_ITEM Boost_LIBRARIES ${Boost_REGEX_LIBRARY} Boost::regex)
+endif()
 # This is only needed for FindBoost, when libraries are just paths to the library files on the disk.
 # If Boost is found using cmake config, then all its Boost_LIBRARIES are targets
 # and automatically depend on the headers.

cmake/IfcOpenShellConfig.cmake.in

@@ -30,11 +30,8 @@ if(NOT "${IFCOPENSHELL_BOOST_USE_MULTITHREADED}" STREQUAL "")
     set(Boost_USE_MULTITHREADED ${IFCOPENSHELL_BOOST_USE_MULTITHREADED})
 endif()
 set(Boost_COMPONENTS
-    system
     program_options
     regex
-    thread
-    date_time
     iostreams
 )
 find_dependency(Boost CONFIG COMPONENTS ${Boost_COMPONENTS})

nix/build-all.py

@@ -1519,13 +1519,9 @@ if "boost" in targets:
         mode="bjam",
         build_tool_args=[
             f"--stagedir={Dependencies.get_install_dir('boost')}",
-            "--with-system",
             "--with-program_options",
             "--with-regex",
-            "--with-thread",
-            "--with-date_time",
             "--with-iostreams",
-            "--with-filesystem",
             # By default boost will keep ICU enabled, if it manages to find dev ICU dev package on the system.
             # Which then creates issues when during our executables packaging.
             # E.g. it ends up linking system's `libicudata.so.67`, so then we need to somehow detect and bundle

win/build-deps.cmd

@@ -421,7 +421,7 @@ if /I "%VS_PLATFORM%"=="x64" (
     echo "Failed to identify architecture"
     GOTO :Error
 )
-set BOOST_LIBS=--with-system --with-regex --with-thread --with-program_options --with-date_time --with-iostreams --with-filesystem
+set BOOST_LIBS=--with-regex --with-program_options --with-iostreams --with-filesystem
 :: NOTE Boost is fast to build with limited set of libraries so build it always.
 cd "%DEPENDENCY_DIR%"
 call cecho.cmd 0 13 "Building %DEPENDENCY_NAME% %BOOST_LIBS% Please be patient, this will take a while."

win/installers.py

@@ -307,11 +307,8 @@ def install_boost(
         sys.exit(1)
 
     BOOST_LIBS = (
-        "--with-system",
         "--with-program_options",
         "--with-regex",
-        "--with-thread",
-        "--with-date_time",
         "--with-iostreams",
         "--with-filesystem",
     )