toolchain: add a program for compiling ipc interface definitions

ifc can be used to compile .if files into self-contained header-only C
libraries, which can be used to send/receive messages that conform
to the described interface.

configure-build

@@ -10,7 +10,7 @@ fi
 
 build_type=Debug
 source_dir=$(realpath $(dirname "$0"))
-native_build_dir=$source_dir/build-native
+toolchain_build_dir=$source_dir/build/toolchain
 target_build_dir=$source_dir/build
 sysroot_dir=$target_build_dir/sysroot
 
@@ -19,25 +19,35 @@ if [ ! -d "$source_dir/arch/$target_arch" ]; then
 	exit -1
 fi
 
-rm -rf $native_build_dir $target_build_dir
-mkdir -p $native_build_dir $target_build_dir
+rm -rf $toolchain_build_dir $target_build_dir
+mkdir -p $toolchain_build_dir $target_build_dir
 
-pushd $native_build_dir > /dev/null
+pushd $toolchain_build_dir > /dev/null
 
 cmake \
-	-DCMAKE_RUNTIME_OUTPUT_DIRECTORY="$native_build_dir/bin" \
-	-DCMAKE_LIBRARY_OUTPUT_DIRECTORY="$native_build_dir/lib" \
-	-DCMAKE_ARCHIVE_OUTPUT_DIRECTORY="$native_build_dir/lib" \
 	-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
 	-DCMAKE_BUILD_TYPE=$build_type \
-	$source_dir/kernel/tools
+	$source_dir/toolchain
+
+case $CMAKE_GENERATOR in
+	Ninja)
+		ninja
+		;;
+	"Unix Makefiles")
+		make
+		;;
+
+	*)
+		make
+		;;
+esac
 
 popd
 
 pushd $target_build_dir > /dev/null
 
 cmake \
-	-DBUILD_TOOLS_DIR=$native_build_dir/bin \
+	-DBUILD_TOOLS_DIR=$toolchain_build_dir/bin \
 	-DCMAKE_INSTALL_PREFIX=$sysroot_dir \
 	-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
 	-DTARGET_ARCH=$target_arch \