build xmc4800-relax using CMake

arch/arm/src/xmc4/CMakeLists.txt

@@ -0,0 +1,54 @@
+# ##############################################################################
+# arch/arm/src/xmc4/CMakeLists.txt
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+set(SRCS)
+
+list(
+  APPEND
+  SRCS
+  xmc4_allocateheap.c
+  xmc4_clockconfig.c
+  xmc4_clockutils.c
+  xmc4_clrpend.c
+  xmc4_gpio.c
+  xmc4_irq.c
+  xmc4_lowputc.c
+  xmc4_serial.c
+  xmc4_start.c
+  xmc4_usic.c
+  xmc4_timerisr.c)
+
+if(CONFIG_BUILD_PROTECTED)
+  list(APPEND SRCS xmc4_userspace.c xmc4_mpuinit.c)
+endif()
+
+if(CONFIG_ECAT)
+  list(APPEND SRCS xmc4_ecat.c)
+endif()
+
+if(NOT CONFIG_ARCH_IDLE_CUSTOM)
+  list(APPEND SRCS xmc4_idle.c)
+endif()
+
+if(CONFIG_XMC4_USCI_SPI)
+  list(APPEND SRCS xmc4_spi.c)
+endif()
+
+target_sources(arch PRIVATE ${SRCS})

boards/arm/xmc4/xmc4800-relax/CMakeLists.txt

@@ -0,0 +1,21 @@
+# ##############################################################################
+# boards/arm/xmc4/xmc4800-relax/CMakeLists.txt
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+add_subdirectory(src)

boards/arm/xmc4/xmc4800-relax/src/CMakeLists.txt

@@ -0,0 +1,43 @@
+# ##############################################################################
+# boards/arm/xmc4/xmc4800/src/CMakeLists.txt
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+set(SRCS xmc4_boot.c xmc4_bringup.c)
+
+if(CONFIG_INPUT_BUTTONS)
+  list(APPEND SRCS xmc4_buttons.c)
+endif()
+
+if(CONFIG_ARCH_LEDS)
+  list(APPEND SRCS xmc4_autoleds.c)
+else()
+  list(APPEND SRCS xmc4_userleds.c)
+endif()
+
+if(CONFIG_XMC4_USCI_SPI)
+  list(APPEND SRCS xmc4_spi.c)
+endif()
+
+if(CONFIG_BOARDCTL)
+  list(APPEND SRCS xmc4_appinit.c)
+endif()
+
+target_sources(board PRIVATE ${SRCS})
+
+set_property(GLOBAL PROPERTY LD_SCRIPT "${NUTTX_BOARD_DIR}/scripts/flash.ld")