Integrating LibBGCode into deps with an optional var for source dir

One can then co-develop the two projects with relative convenience

deps/CMakeLists.txt

@@ -20,8 +20,8 @@
 # therefore, unfortunatelly, the installation cannot be copied/moved elsewhere without re-installing wxWidgets.
 #
 
+cmake_minimum_required(VERSION 3.10)
 project(PrusaSlicer-deps)
-cmake_minimum_required(VERSION 3.2)
 
 include(ExternalProject)
 include(ProcessorCount)
@@ -62,6 +62,8 @@ if (NOT _is_multi AND NOT CMAKE_BUILD_TYPE)
     message(STATUS "Forcing CMAKE_BUILD_TYPE to Release as it was not specified.")
 endif ()
 
+cmake_policy(SET CMP0135 NEW)
+
 function(prusaslicer_add_cmake_project projectname)
     cmake_parse_arguments(P_ARGS "" "INSTALL_DIR;BUILD_COMMAND;INSTALL_COMMAND" "CMAKE_ARGS" ${ARGN})
 
@@ -195,6 +197,8 @@ include(NanoSVG/NanoSVG.cmake)
 include(wxWidgets/wxWidgets.cmake)
 include(OCCT/OCCT.cmake)
 
+include(LibBGCode/LibBGCode.cmake)
+
 set(_dep_list
     dep_Boost
     dep_TBB
@@ -206,10 +210,11 @@ set(_dep_list
     dep_OpenCSG
     dep_CGAL
     dep_Qhull
-    dep_OCCT
+    # dep_OCCT
     ${PNG_PKG}
     ${ZLIB_PKG}
     ${EXPAT_PKG}
+    dep_LibBGCode
     )
 
 # if (NOT MSVC)

deps/LibBGCode/LibBGCode.cmake

@@ -0,0 +1,24 @@
+set(LibBGCode_SOURCE_DIR "" CACHE PATH "Optionally specify local LibBGCode source directory")
+
+set(_source_dir_line "URL;https://github.com/prusa3d/libbgcode/archive/refs/heads/main.zip")
+
+if (LibBGCode_SOURCE_DIR)
+    set(_source_dir_line "SOURCE_DIR;${LibBGCode_SOURCE_DIR};BUILD_ALWAYS;ON")
+endif ()
+
+prusaslicer_add_cmake_project(LibBGCode_deps
+    ${_source_dir_line}
+    SOURCE_SUBDIR deps
+    CMAKE_ARGS
+        -DDEP_DOWNLOAD_DIR:PATH=${DEP_DOWNLOAD_DIR}
+        -DLibBGCode_Deps_SELECT_ALL:BOOL=OFF
+        -DLibBGCode_Deps_SELECT_heatshrink:BOOL=ON
+        -DDESTDIR=${DESTDIR}
+)
+
+prusaslicer_add_cmake_project(LibBGCode
+    ${_source_dir_line}
+    DEPENDS dep_LibBGCode_deps
+    CMAKE_ARGS
+        -DLibBGCode_BUILD_TESTS:BOOL=OFF
+)

src/libslic3r/CMakeLists.txt

@@ -14,6 +14,8 @@ if (TARGET OpenVDB::openvdb)
     set(OpenVDBUtils_SOURCES OpenVDBUtils.cpp OpenVDBUtils.hpp OpenVDBUtilsLegacy.hpp)
 endif()
 
+find_package(LibBGCode REQUIRED COMPONENTS Convert)
+
 set(SLIC3R_SOURCES
     pchheader.cpp
     pchheader.hpp
@@ -508,6 +510,7 @@ target_link_libraries(libslic3r
     ZLIB::ZLIB
 	JPEG::JPEG
     qoi
+    LibBGCode::bgcode_convert
     )
 
 if (APPLE)