fix: enhance Boost CMake configuration for environment variable support

- Added a check in bin/CMakeLists.txt to set Boost_ROOT from the BOOSTROOT environment variable if not already defined.
- Corrected the setting of the BOOSTROOT environment variable in lib/boost/CMakeLists.txt to ensure proper usage.

Author: bialger

bin/CMakeLists.txt

@@ -4,6 +4,10 @@ set(Boost_USE_STATIC_LIBS ON)
 set(Boost_USE_STATIC_RUNTIME ON)
 set(BOOST_ALL_DYN_LINK OFF)
 
+if (NOT Boost_ROOT AND EXISTS $ENV{BOOSTROOT})
+    set(Boost_ROOT $ENV{BOOSTROOT})
+endif()
+
 find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
 find_package(Boost REQUIRED)
 

lib/boost/CMakeLists.txt

@@ -12,7 +12,7 @@ set(BOOST_SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/boost_${BOOST_VERSION_UNDERSCO
 # b2 stage (default) puts libs in <source>/stage/lib or stage/lib/<variant>/, headers stay in <source>
 set(BOOST_STAGE_DIR "${BOOST_SOURCE_DIR}/stage")
 set(BOOST_STAGE_LIB_DIR "${BOOST_SOURCE_DIR}/stage/lib")
-set($ENV{BOOSTROOT} ${BOOST_SOURCE_DIR})
+set(ENV{BOOSTROOT} ${BOOST_SOURCE_DIR})
 
 # If we already built Boost here (stage), use it directly and skip find_package/build
 if(EXISTS "${BOOST_SOURCE_DIR}/boost/version.hpp")
@@ -63,7 +63,7 @@ if(NOT Boost_FOUND)
                 WORKING_DIRECTORY ${BOOST_SOURCE_DIR}
         )
 
-        set(Boost_INCLUDE_DIRS "${BOOST_SOURCE_DIR}")
+        set(Boost_ROOT "${BOOST_SOURCE_DIR}")
         find_package(Boost 1.83 QUIET)
 else()
         message(STATUS "Boost found in the system.")