cmake: support arm specific libm

libs/libm/CMakeLists.txt

@@ -0,0 +1,20 @@
+# ##############################################################################
+# libs/libm/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.
+#
+# ##############################################################################
+nuttx_add_subdirectory()

libs/libm/libm/CMakeLists.txt

@@ -18,6 +18,11 @@
 #
 # ##############################################################################
 if(CONFIG_LIBM)
+
+  if(CONFIG_ARCH_ARM)
+    nuttx_add_subdirectory(arm)
+  endif()
+
   # Add the floating point math C files to the build
 
   set(SRCS

libs/libm/libm/arm/CMakeLists.txt

@@ -0,0 +1,21 @@
+# ##############################################################################
+# libs/libm/libm/arm/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.
+#
+# ##############################################################################
+
+nuttx_add_subdirectory()

libs/libm/libm/arm/armv7-m/CMakeLists.txt

@@ -0,0 +1,33 @@
+# ##############################################################################
+# libs/libm/libm/arm/armv7-m/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.
+#
+# ##############################################################################
+
+if(CONFIG_ARMV7M_LIBM)
+  set(SRCS)
+
+  if(CONFIG_LIBM_ARCH_FABSF)
+    list(APPEND SRCS arch_fabsf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_SQRTF)
+    list(APPEND SRCS arch_sqrtf.c)
+  endif()
+
+  target_sources(c PRIVATE ${SRCS})
+endif()

libs/libm/libm/arm/armv8-m/CMakeLists.txt

@@ -0,0 +1,73 @@
+# ##############################################################################
+# libs/libm/libm/arm/armv8-m/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.
+#
+# ##############################################################################
+
+if(CONFIG_ARMV8M_LIBM)
+  set(SRCS)
+
+  if(CONFIG_LIBM_ARCH_CEIL)
+    list(APPEND SRCS arch_ceil.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_CEILF)
+    list(APPEND SRCS arch_ceilf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_FLOOR)
+    list(APPEND SRCS arch_floor.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_FLOORF)
+    list(APPEND SRCS arch_floorf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_NEARBYINT)
+    list(APPEND SRCS arch_nearbyint.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_NEARBYINTF)
+    list(APPEND SRCS arch_nearbyintf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_RINTF)
+    list(APPEND SRCS arch_rintf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_ROUNDF)
+    list(APPEND SRCS arch_roundf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_TRUNCF)
+    list(APPEND SRCS arch_truncf.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_RINT)
+    list(APPEND SRCS arch_rint.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_ROUND)
+    list(APPEND SRCS arch_round.c)
+  endif()
+
+  if(CONFIG_LIBM_ARCH_TRUNC)
+    list(APPEND SRCS arch_trunc.c)
+  endif()
+
+  target_sources(c PRIVATE ${SRCS})
+endif()