updated BuildMacOS.sh to support XCode builds

updated Qhull.cmake to add patch to the imported Qhull CMakeLists.txt so that it creates correctly named debug libraries.
#3173

BuildMacOS.sh

@@ -12,7 +12,7 @@ then
     exit -1
 fi
 
-while getopts ":iaxbh" opt; do
+while getopts ":iaxbhc" opt; do
   case ${opt} in
     i )
         export BUILD_IMAGE="1"
@@ -26,11 +26,15 @@ while getopts ":iaxbh" opt; do
     b )
         export BUILD_DEBUG="1"
         ;;
+    c)
+        export BUILD_XCODE="1"
+        ;;
     h ) echo "Usage: ./BuildMacOS.sh [-i]"
         echo "   -i: Generate DMG image (optional)"
         echo "   -a: Build for arm64 (Apple Silicon)"
         echo "   -x: Build for x86_64 (Intel)"
         echo "   -b: Build with debug symbols"
+        echo "   -c: Build for XCode"
         exit 0
         ;;
   esac
@@ -157,18 +161,24 @@ echo -n "[7/9] Configuring Slic3r..."
     then
         BUILD_ARGS="-DCMAKE_BUILD_TYPE=Debug ${BUILD_ARGS}"
     fi
+    if [[ -n "$BUILD_XCODE" ]]
+    then
+        BUILD_ARGS="-GXcode ${BUILD_ARGS}"
+    fi
     # cmake
     pushd build
-    echo "Cmake command: cmake .. -DCMAKE_PREFIX_PATH=\"$PWD/../deps/build/destdir/usr/local\" -DCMAKE_OSX_DEPLOYMENT_TARGET=\"10.14\" -DSLIC3R_STATIC=1 ${BUILD_ARGS}"
+    echo "Slic3r Cmake command: cmake .. -DCMAKE_PREFIX_PATH=\"$PWD/../deps/build/destdir/usr/local\" -DCMAKE_OSX_DEPLOYMENT_TARGET=\"10.14\" -DSLIC3R_STATIC=1 ${BUILD_ARGS}"
     cmake .. -DCMAKE_PREFIX_PATH="$PWD/../deps/build/destdir/usr/local" -DCMAKE_OSX_DEPLOYMENT_TARGET="10.14" -DSLIC3R_STATIC=1 ${BUILD_ARGS}
 } #&> $ROOT/build/Build.log # Capture all command output
 echo "done"
 
 echo -n "[8/9] Building Slic3r..."
 {
     # make Slic3r
-    make -j$NCORES Slic3r
-
+    if [[ -z "$BUILD_XCODE" ]]
+    then
+        make -j$NCORES Slic3r
+    fi
     # make .mo
     make gettext_po_to_mo
 } #&> $ROOT/build/Build.log # Capture all command output

deps/Qhull/Qhull.cmake

@@ -1,11 +1,20 @@
 include(GNUInstallDirs)
+
+set(_patch_step "")
+if (APPLE)
+    set(_patch_step PATCH_COMMAND ${PATCH_CMD} ${CMAKE_CURRENT_LIST_DIR}/Qhull.patch)
+endif ()
+
+
 prusaslicer_add_cmake_project(Qhull
     URL "https://github.com/qhull/qhull/archive/v8.0.1.zip"
     URL_HASH SHA256=5287f5edd6a0372588f5d6640799086a4033d89d19711023ef8229dd9301d69b
+    "${_patch_step}"
     CMAKE_ARGS 
         -DINCLUDE_INSTALL_DIR=${CMAKE_INSTALL_INCLUDEDIR}
 )
 
+
 if (MSVC)
     add_debug_dep(dep_Qhull)
 endif ()

deps/Qhull/Qhull.patch

@@ -0,0 +1,33 @@
+--- CMakeLists.txt	2020-08-04 20:37:02.000000000 -0700
++++ CMakeLists.txt	2022-08-14 12:02:28.000000000 -0700
+@@ -339,21 +339,21 @@
+
+ include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src)
+
+-if(CMAKE_BUILD_TYPE MATCHES "[dD]ebug")
+-    set(qhull_CPP qhullcpp_d)
+-    set(qhull_SHARED qhull_d) 
+-    set(qhull_SHAREDP qhull_pd)
+-    set(qhull_SHAREDR qhull_rd)
+-    set(qhull_STATIC qhullstatic_d)
+-    set(qhull_STATICR qhullstatic_rd)
+-else()
++#if(CMAKE_BUILD_TYPE MATCHES "[dD]ebug")
++#    set(qhull_CPP qhullcpp_d)
++#    set(qhull_SHARED qhull_d) 
++#    set(qhull_SHAREDP qhull_pd)
++#    set(qhull_SHAREDR qhull_rd)
++#    set(qhull_STATIC qhullstatic_d)
++#    set(qhull_STATICR qhullstatic_rd)
++#else()
+     set(qhull_CPP qhullcpp)
+     set(qhull_SHARED libqhull)  # Temporarily avoid name conflict with qhull executable
+     set(qhull_SHAREDP qhull_p)
+     set(qhull_SHAREDR qhull_r)
+     set(qhull_STATIC qhullstatic)
+     set(qhull_STATICR qhullstatic_r)
+-endif()
++#endif()
+
+ set(
+     qhull_TARGETS_INSTALL