Try Boost_DIR

.github/workflows/cd.yml

@@ -286,25 +286,25 @@ jobs:
           CIBW_BUILD_VERBOSITY: "1"
           CIBW_ARCHS_WINDOWS: "${{ matrix.cibuildwheel_architecture }}"
           CIBW_ENVIRONMENT_WINDOWS: >
-            BOOST_ROOT="$(cygpath -w $(pwd))"
+            Boost_DIR="$(cygpath -w $(pwd))"
             OCL_BOOST_ADDRESS_MODEL="${{ matrix.boost_address_model }}"
             OCL_BOOST_ARCHITECTURE="${{ matrix.boost_architecture }}"
             CMAKE_GENERATOR="Visual Studio 17 2022"
             CMAKE_GENERATOR_PLATFORM="${{ matrix.cmake_generator_platform }}"
-          CIBW_ENVIRONMENT_PASS_WINDOWS: "BOOST_ROOT OCL_BOOST_ADDRESS_MODEL OCL_BOOST_ARCHITECTURE CMAKE_GENERATOR CMAKE_GENERATOR_PLATFORM"
+          CIBW_ENVIRONMENT_PASS_WINDOWS: "Boost_DIR OCL_BOOST_ADDRESS_MODEL OCL_BOOST_ARCHITECTURE CMAKE_GENERATOR CMAKE_GENERATOR_PLATFORM"
           CIBW_ARCHS_MACOS: "${{ matrix.architecture }}"
           CIBW_ENVIRONMENT_MACOS: >
-            BOOST_ROOT="$(pwd)"
+            Boost_DIR="$(pwd)"
             OCL_MACOS_ARCHITECTURE="${{ matrix.architecture }}"
             OCL_BOOST_ARCHITECTURE="${{ matrix.boost_architecture }}"
             OPENMP_PREFIX_MACOS="/tmp/libomp/libomp/fixed"
-          CIBW_ENVIRONMENT_PASS_MACOS: "BOOST_ROOT OCL_BOOST_ARCHITECTURE OPENMP_PREFIX_MACOS"
+          CIBW_ENVIRONMENT_PASS_MACOS: "Boost_DIR OCL_BOOST_ARCHITECTURE OPENMP_PREFIX_MACOS"
           CIBW_ARCHS_LINUX: "${{ matrix.architecture }}"
           CIBW_ENVIRONMENT_LINUX: >
-            BOOST_ROOT="$(pwd)"
+            Boost_DIR="$(pwd)"
             OCL_BOOST_ARCHITECTURE="${{ matrix.boost_architecture }}"
             CMAKE_GENERATOR="Unix Makefiles"
-          CIBW_ENVIRONMENT_PASS_LINUX: "BOOST_ROOT OCL_BOOST_ARCHITECTURE CMAKE_GENERATOR"
+          CIBW_ENVIRONMENT_PASS_LINUX: "Boost_DIR OCL_BOOST_ARCHITECTURE CMAKE_GENERATOR"
       # - name: Compress Boost.Python
       #   shell: bash
       #   run: |

README.rst

@@ -204,7 +204,7 @@ Make sure you have a compiler, git, cmake and Boost installed (or simply downloa
     make . # try make -j4 for a faster build if you have a multi-core machine
     make install .
 
-When boost is not in a standard location, you can add the ``-D BOOST_ROOT=/path/to/boost`` option to the cmake command.
+When boost is not in a standard location, you can add the ``-D Boost_DIR=/path/to/boost`` option to the cmake command.
 
 =======================
 Building for Emscripten
@@ -233,7 +233,7 @@ Now you can compile OpenCAMLib like this (make sure to replace the ``path/to/``
       -D BUILD_EMSCRIPTEN_LIB="ON" \
       -D USE_OPENMP="OFF" \
       -D CMAKE_INSTALL_PREFIX="/path/to/opencamlib/src/npmpackage/build" \
-      -D BOOST_ROOT="/path/to/boost" \
+      -D Boost_DIR="/path/to/boost" \
       ..
     emmake make # try emmake make -j4 for a faster build if you have a multi-core machine
 
@@ -266,7 +266,7 @@ Next, use cmake-js to compile the library:
       --CDBUILD_NODEJS_LIB="ON" \
       --CDUSE_OPENMP="ON" \
       --CDCMAKE_INSTALL_PREFIX="/path/to/opencamlib/build/Release/$(node --print 'process.platform')-nodejs-$(node --print 'process.arch')" \
-      --CDBOOST_ROOT="/path/to/boost" \
+      --CDBoost_DIR="/path/to/boost" \
       --config "Release"
 
 ===================
@@ -337,7 +337,7 @@ This happens a lot, here are some of the reasons why this happens:
 If you forgot to install boost, go ahead and download Boost from from their website: https://www.boost.org/users/download/ and extract it somewhere.
 Now, when compiling the C++ or node.js module, add the
 
-``-D BOOST_ROOT=/path/to/extracted/boost`` flag to the ``cmake ..`` command, or the.
+``-D Boost_DIR=/path/to/extracted/boost`` flag to the ``cmake ..`` command, or the.
 
 ``--boost-prefix /path/to/extracted/boost`` flag to the ``./install.sh`` command
 

install.sh

@@ -400,7 +400,7 @@ get_cmake_args() {
     -D VERSION_STRING="2023.09.6"
     ${OCL_DISABLE_OPENMP:+"-D USE_OPENMP=OFF"} \
     ${OCL_INSTALL_PREFIX:+"-D CMAKE_INSTALL_PREFIX=${OCL_INSTALL_PREFIX}"} \
-    ${OCL_BOOST_PREFIX:+"-D BOOST_ROOT=${OCL_BOOST_PREFIX}"}"
+    ${OCL_BOOST_PREFIX:+"-D Boost_DIR=${OCL_BOOST_PREFIX}"}"
 }
 
 get_cmakejs_args() {
@@ -427,7 +427,7 @@ test_cxxlib() {
         ${OCL_GENERATOR:+"-G ${OCL_GENERATOR}"} \
         ${OCL_GENERATOR_PLATFORM:+"-A ${OCL_GENERATOR_PLATFORM}"} \
         -D Boost_ADDITIONAL_VERSIONS="${boost_additional_versions}" \
-        ${OCL_BOOST_PREFIX:+"-DBOOST_ROOT=${OCL_BOOST_PREFIX}"}
+        ${OCL_BOOST_PREFIX:+"-DBoost_DIR=${OCL_BOOST_PREFIX}"}
     set +x
     cd build
     cmake_build
@@ -480,7 +480,7 @@ build_pythonlib() {
     export CMAKE_ARGS="${OCL_GENERATOR:+"-G ${OCL_GENERATOR} "}\
 ${OCL_GENERATOR_PLATFORM:+"-A ${OCL_GENERATOR_PLATFORM} "}\
 -D CMAKE_BUILD_TYPE=${build_type} \
-${OCL_BOOST_PREFIX:+"-D BOOST_ROOT=${OCL_BOOST_PREFIX} "}"
+${OCL_BOOST_PREFIX:+"-D Boost_DIR=${OCL_BOOST_PREFIX} "}"
     cd "${project_dir}"
     ${python_executable} -m pip install --verbose .
 }

src/CMakeLists.txt

@@ -109,7 +109,7 @@ set(Boost_DEBUG ON CACHE BOOL "boost-debug")
 if(USE_STATIC_BOOST)
   set(Boost_USE_STATIC_LIBS ON CACHE BOOL "boost-use-static-libs")
 endif()
-if(DEFINED ENV{BOOST_ROOT} OR DEFINED BOOST_ROOT)
+if(DEFINED ENV{Boost_DIR} OR DEFINED Boost_DIR)
   set(Boost_NO_SYSTEM_PATHS ON)
 endif()
 if(CMAKE_BUILD_TYPE MATCHES Debug)