X-Git-Url: http://nitlanguage.org

diff --git a/src/platform/ios.nit b/src/platform/ios.nit
index da9cfda..27979b0 100644
--- a/src/platform/ios.nit
+++ b/src/platform/ios.nit
@@ -32,7 +32,7 @@ private class IOSPlatform
 	super Platform
 
 	redef fun supports_libunwind do return false
-	redef fun supports_libgc do return false
+	redef fun supports_libgc do return true
 	redef fun toolchain(toolcontext, compiler) do return new IOSToolchain(toolcontext, compiler)
 end
 
@@ -53,6 +53,8 @@ private class IOSToolchain
 
 	redef fun default_outname do return "{super}.app"
 
+	private var bdwgc_dir: nullable String = null
+
 	# Compile C files in `ios_project_root/app_project.name`
 	redef fun compile_dir
 	do
@@ -66,6 +68,20 @@ private class IOSToolchain
 		if ios_project_root.file_exists then ios_project_root.rmdir
 		compile_dir.mkdir
 
+		# Download the libgc/bdwgc sources
+		var nit_dir = toolcontext.nit_dir or else "."
+		var share_dir = (nit_dir/"share").realpath
+		if not share_dir.file_exists then
+			print "iOS project error: Nit share directory not found, please use the environment variable NIT_DIR"
+			exit 1
+		end
+
+		var bdwgc_dir = "{share_dir}/android-bdwgc/bdwgc"
+		self.bdwgc_dir = bdwgc_dir
+		if not bdwgc_dir.file_exists then
+			toolcontext.exec_and_check(["{share_dir}/android-bdwgc/setup.sh"], "iOS project error")
+		end
+
 		super
 	end
 
@@ -151,6 +167,20 @@ private class IOSToolchain
 			pbx.add_file new PbxFile(file.filename.basename)
 		end
 
+		# GC
+		if compiler.target_platform.supports_libgc then
+			var bdwgc_dir = bdwgc_dir
+			assert bdwgc_dir != null
+
+			pbx.cflags = "-I '{bdwgc_dir}/include/' -I '{bdwgc_dir}/libatomic_ops/src' -fno-strict-aliasing " +
+			"-DWITH_LIBGC -DNO_EXECUTE_PERMISSION -DALL_INTERIOR_POINTERS -DGC_NO_THREADS_DISCOVERY -DNO_DYLD_BIND_FULLY_IMAGE " +
+			"-DGC_DISABLE_INCREMENTAL -DGC_THREADS -DUSE_MMAP -DUSE_MUNMAP -DGC_GCJ_SUPPORT -DJAVA_FINALIZATION "
+
+			var gc_file = new PbxFile("{bdwgc_dir}/extra/gc.c")
+			gc_file.cflags = "-Wno-tautological-pointer-compare"
+			pbx.add_file gc_file
+		end
+
 		# Basic storyboard, mainly to have the right screen size
 		var launch_screen_storyboard = new LaunchScreenStoryboardTemplate
 		launch_screen_storyboard.title = app_project.name