kernel: use cmake macro for adding kernel files

simplify cmake file and use macros for adding files that are part of the
kernel based on the configuration.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

kernel/CMakeLists.txt

@@ -10,6 +10,17 @@ zephyr_syscall_header(
   ${ZEPHYR_BASE}/include/zephyr/sys/time_units.h
 )
 
+# Helper macro to append files to the kernel_files list
+macro(kernel_sources_ifdef feature_toggle)
+  if(${${feature_toggle}})
+    list(APPEND kernel_files ${ARGN})
+  endif()
+endmacro()
+
+macro(kernel_sources)
+    list(APPEND kernel_files ${ARGN})
+endmacro()
+
 if(NOT CONFIG_ERRNO_IN_TLS AND NOT CONFIG_LIBC_ERRNO)
   zephyr_syscall_header(${ZEPHYR_BASE}/include/zephyr/sys/errno_private.h)
 endif()
@@ -47,7 +58,7 @@ else()
 # FIXME: SHADOW_VARS: Remove this once we have enabled -Wshadow globally.
 add_compile_options($<TARGET_PROPERTY:compiler,warning_shadow_variables>)
 
-list(APPEND kernel_files
+kernel_sources(
   main_weak.c
   banner.c
   busy_wait.c
@@ -61,14 +72,11 @@ list(APPEND kernel_files
   version.c
   )
 
-if(CONFIG_SCHED_CPU_MASK)
-list(APPEND kernel_files
+kernel_sources_ifdef(CONFIG_SCHED_CPU_MASK
   cpu_mask.c
   )
-endif()
 
-if(CONFIG_MULTITHREADING)
-list(APPEND kernel_files
+kernel_sources_ifdef(CONFIG_MULTITHREADING
   idle.c
   mailbox.c
   msg_q.c
@@ -84,53 +92,24 @@ list(APPEND kernel_files
   pipe.c
   )
 
+if(CONFIG_MULTITHREADING)
 if (CONFIG_SCHED_SCALABLE OR CONFIG_WAITQ_SCALABLE)
-list(APPEND kernel_files priority_queues.c)
+kernel_sources(priority_queues.c)
 endif()
 
-if(CONFIG_SMP)
-list(APPEND kernel_files
+kernel_sources_ifdef(CONFIG_SMP
      smp.c
      ipi.c)
-endif()
 else() # CONFIG_MULTITHREADING
-list(APPEND kernel_files
-  nothread.c
-  )
+kernel_sources(nothread.c)
 endif() # CONFIG_MULTITHREADING
 
-if(CONFIG_TIMESLICING)
-list(APPEND kernel_files
-     timeslicing.c)
-endif()
-
-if(CONFIG_SPIN_VALIDATE)
-list(APPEND kernel_files
-     spinlock_validate.c)
-endif()
-
-if(CONFIG_IRQ_OFFLOAD)
-list(APPEND kernel_files
-  irq_offload.c
-  )
-endif()
-
-
-if (CONFIG_BOOTARGS)
-list(APPEND kernel_files
-  boot_args.c
-  )
-endif()
-
-if(CONFIG_THREAD_MONITOR)
-list(APPEND kernel_files
-     thread_monitor.c)
-endif()
-
-if(CONFIG_DEMAND_PAGING_STATS)
-list(APPEND kernel_files
-     paging/statistics.c)
-endif()
+kernel_sources_ifdef(CONFIG_TIMESLICING timeslicing.c)
+kernel_sources_ifdef(CONFIG_SPIN_VALIDATE spinlock_validate.c)
+kernel_sources_ifdef(CONFIG_IRQ_OFFLOAD irq_offload.c)
+kernel_sources_ifdef(CONFIG_BOOTARGS boot_args.c)
+kernel_sources_ifdef(CONFIG_THREAD_MONITOR thread_monitor.c)
+kernel_sources_ifdef(CONFIG_DEMAND_PAGING_STATS paging/statistics.c)
 
 add_library(kernel ${kernel_files})