Extract changes to cpu/cc13xx-cc26xx

Makefile.identify-target

@@ -11,6 +11,4 @@ ifeq ($(TARGET),)
   else
     ${info using saved target '$(TARGET)'}
   endif
-else
-  ${info using set target '$(TARGET)'}
 endif

Makefile.include

@@ -39,15 +39,13 @@ ifdef CI
   endif
 endif
 
-OBJECTDIR := obj_$(TARGET)
+OBJECTDIR = obj_$(TARGET)
 
 LOWERCASE = -abcdefghijklmnopqrstuvwxyz/
 UPPERCASE = _ABCDEFGHIJKLMNOPQRSTUVWXYZ_
 TARGET_UPPERCASE := ${strip ${shell echo $(TARGET) | sed y!$(LOWERCASE)!$(UPPERCASE)!}}
-CFLAGS += -DCONTIKI=1
+CFLAGS += -DCONTIKI=1 -DCONTIKI_TARGET_$(TARGET_UPPERCASE)=1
-CFLAGS += -DCONTIKI_TARGET_$(TARGET_UPPERCASE)=1
 CFLAGS += -DCONTIKI_TARGET_STRING=\"$(TARGET)\"
-
 ifneq ($(BOARD),)
 TARGET_BOARD_UPPERCASE := ${strip ${shell echo $(BOARD) | sed y!$(LOWERCASE)!$(UPPERCASE)!}}
 CFLAGS += -DCONTIKI_BOARD_$(TARGET_BOARD_UPPERCASE)=1
@@ -264,10 +262,8 @@ CONTIKI_CPU_DIRS_CONCAT    = ${addprefix $(CONTIKI_CPU)/, \
                                $(CONTIKI_CPU_DIRS)}
 CONTIKI_ARCH_DIRS    = ${addprefix $(CONTIKI)/, arch}
 
-SOURCEDIRS = . $(PROJECTDIRS) $(CONTIKI_TARGET_DIRS_CONCAT) \
+SOURCEDIRS = . $(PROJECTDIRS) $(CONTIKI_TARGET_DIRS_CONCAT) $(CONTIKI_ARCH_DIRS) \
-			 $(CONTIKI_ARCH_DIRS) $(CONTIKI_CPU_DIRS_CONCAT) \
+             $(CONTIKI_CPU_DIRS_CONCAT) $(CONTIKIDIRS) $(MODULEDIRS) $(EXTERNALDIRS) ${dir $(target_makefile)}
-			 $(CONTIKIDIRS) $(MODULEDIRS) $(EXTERNALDIRS) \
-			 $(dir $(target_makefile))
 
 vpath %.c $(SOURCEDIRS)
 vpath %.S $(SOURCEDIRS)
@@ -323,10 +319,7 @@ distclean:
 		$(MAKE) TARGET=$$TARG clean; \
 	done
 
-custom_rules := $(CONTIKI)/arch/platform/$(TARGET)/Makefile.customrules-$(TARGET)
+-include $(CONTIKI)/arch/platform/$(TARGET)/Makefile.customrules-$(TARGET)
-ifneq ("$(wildcard $(custom_rules))","")
--include $(custom_rules)
-endif
 
 ifndef CUSTOM_RULE_C_TO_OBJECTDIR_O
 $(OBJECTDIR)/%.o: %.c | $(OBJECTDIR)
@@ -488,12 +481,6 @@ endif
 # the match-anything rule below instead.
 %: %.c
 
-# Prevent Make from remaking any makefiles. This was particularly an
-# issue when you had a Makefile with a suffix equal to that of $(TARGET),
-# as it managed to match with the %.$(TARGET) rule, which in turn screwed
-# everything up.
-Makefile.%: ;
-
 ifeq ($(PLATFORM_ACTION),skip)
 # Skip this target.
 $(CONTIKI_PROJECT):

arch/cpu/arm/Makefile.arm

@@ -12,12 +12,6 @@ CFLAGS += -mthumb -mabi=aapcs -mlittle-endian
 CFLAGS += -Werror -Wall
 CFLAGS += -std=c99
 CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
-# A weird behaviour of GCC garbage collection has been observed, where unitialized
-# global variables put in the COMMON section weren't analyzed by the garbage collector
-# at all. No idea why. The fix is to dissallow the common section, which subsequently
-# places all unitialized global variables in the .bss section and enables the
-# garbage collector to analyze the variables.
-CFLAGS += -fno-common
 CFLAGS += -fshort-enums -fomit-frame-pointer -fno-builtin
 
 LDFLAGS += -mthumb -mlittle-endian

arch/cpu/arm/cortex-m/cm3/Makefile.cm3

@@ -3,29 +3,28 @@ CONTIKI_ARM_DIRS += cortex-m/cm3
 CFLAGS += -mcpu=cortex-m3
 
 LDFLAGS += -mcpu=cortex-m3 -nostartfiles
-LDFLAGS += -Wl,--gc-sections
-LDFLAGS += -Wl,--sort-section=alignment
-LDFLAGS += -Wl,-Map=$(@:.elf=-$(TARGET).map)
-LDFLAGS += -Wl,--cref
-LDFLAGS += -Wl,--no-warn-mismatch
 LDFLAGS += -T $(LDSCRIPT)
-
+LDFLAGS += -Wl,--gc-sections,--sort-section=alignment
-TARGET_LIBFLAGS := -Wl,--start-group $(TARGET_LIBFILES) -lc -lgcc -lm -lnosys -Wl,--end-group
+LDFLAGS += -Wl,-Map=$(CONTIKI_NG_PROJECT_MAP),--cref,--no-warn-mismatch
 
 OBJCOPY_FLAGS += --gap-fill 0xff
 
 ### Build syscalls for newlib
 MODULES += os/lib/newlib
 
-CPU_STARTFILES := ${addprefix $(OBJECTDIR)/,${call oname, $(CPU_START_SOURCEFILES)}}
+CPU_STARTFILES = ${addprefix $(OBJECTDIR)/,${call oname, $(CPU_START_SOURCEFILES)}}
 
 ### Compilation rules
 CUSTOM_RULE_LINK = 1
 
+### Resolve any potential circular dependencies between the linked libraries
+### See: https://stackoverflow.com/questions/5651869/gcc-what-are-the-start-group-and-end-group-command-line-options/5651895
+TARGET_LIBFLAGS := -Wl,--start-group $(TARGET_LIBFILES) -lm -Wl,--end-group
+
 .SECONDEXPANSION:
 
-%.elf: $(CPU_STARTFILES) $$(CONTIKI_OBJECTFILES) %.o $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) $(TARGET_LIBS) $(LDSCRIPT)
+%.elf: $(CPU_STARTFILES) $$(CONTIKI_OBJECTFILES) %.o $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) $(LDSCRIPT)
 	$(TRACE_LD)
-	$(Q)$(LD) $(LDFLAGS) ${filter %.o %.a,$^} $(TARGET_LIBFLAGS) -o $@
+	$(Q)$(LD) $(LDFLAGS) ${filter-out $(LDSCRIPT) %.a,$^} ${filter %.a,$^} $(TARGET_LIBFLAGS) -o $@
 
 include $(CONTIKI)/arch/cpu/arm/cortex-m/Makefile.cortex-m

arch/cpu/arm/cortex-m/cm4/Makefile.cm4

@@ -3,29 +3,28 @@ CONTIKI_ARM_DIRS += cortex-m/cm4
 CFLAGS += -mcpu=cortex-m4
 
 LDFLAGS += -mcpu=cortex-m4 -nostartfiles
-LDFLAGS += -Wl,--gc-sections
-LDFLAGS += -Wl,--sort-section=alignment
-LDFLAGS += -Wl,-Map=$(@:.elf=-$(TARGET).map)
-LDFLAGS += -Wl,--cref
-LDFLAGS += -Wl,--no-warn-mismatch
 LDFLAGS += -T $(LDSCRIPT)
-
+LDFLAGS += -Wl,--gc-sections,--sort-section=alignment
-TARGET_LIBFLAGS := -Wl,--start-group $(TARGET_LIBFILES) -lc -lgcc -lm -lnosys -Wl,--end-group
+LDFLAGS += -Wl,-Map=$(CONTIKI_NG_PROJECT_MAP),--cref,--no-warn-mismatch
 
 OBJCOPY_FLAGS += --gap-fill 0xff
 
 ### Build syscalls for newlib
 MODULES += os/lib/newlib
 
-CPU_STARTFILES := ${addprefix $(OBJECTDIR)/,${call oname, $(CPU_START_SOURCEFILES)}}
+CPU_STARTFILES = ${addprefix $(OBJECTDIR)/,${call oname, $(CPU_START_SOURCEFILES)}}
 
 ### Compilation rules
 CUSTOM_RULE_LINK = 1
 
+### Resolve any potential circular dependencies between the linked libraries
+### See: https://stackoverflow.com/questions/5651869/gcc-what-are-the-start-group-and-end-group-command-line-options/5651895
+TARGET_LIBFLAGS := -Wl,--start-group $(TARGET_LIBFILES) -lm -Wl,--end-group
+
 .SECONDEXPANSION:
 
-%.elf: $(CPU_STARTFILES) $$(CONTIKI_OBJECTFILES) %.o $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) $(TARGET_LIBS) $(LDSCRIPT)
+%.elf: $(CPU_STARTFILES) $$(CONTIKI_OBJECTFILES) %.o $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) $(LDSCRIPT)
 	$(TRACE_LD)
-	$(Q)$(LD) $(LDFLAGS) ${filter %.o %.a,$^} $(TARGET_LIBFLAGS) -o $@
+	$(Q)$(LD) $(LDFLAGS) ${filter-out $(LDSCRIPT) %.a,$^} ${filter %.a,$^} $(TARGET_LIBFLAGS) -o $@
 
 include $(CONTIKI)/arch/cpu/arm/cortex-m/Makefile.cortex-m

arch/cpu/cc13xx-cc26xx/Makefile.cc13xx-cc26xx

@@ -24,10 +24,6 @@ else
  endif
 endif
 
-# Both ccfg-conf.c and startup_cc13xx_cc26xx_gcc.c is located locally in
-# the arch/cpu/cc13xx-cc26xx folder.
-CPU_START_SOURCEFILES += ccfg-conf.c startup_cc13xx_cc26xx_gcc.c
-
 ################################################################################
 ### Device Family
 
@@ -52,20 +48,13 @@ else
  SDK_LIB_NAME := $(DEVICE_FAMILY_LC)
 endif
 
-################################################################################
-### Core SDK paths
-
-SDK_NORTOS  := $(CORE_SDK)/kernel/nortos
-SDK_SOURCE  := $(CORE_SDK)/source
-SDK_DRIVERS := $(CORE_SDK)/source/ti/drivers
-SDK_DEVICES := $(CORE_SDK)/source/ti/devices/$(SDK_DEVICES_NAME)
-
-EXTERNALDIRS += $(SDK_SOURCE)
-EXTERNALDIRS += $(SDK_NORTOS)
-
 ################################################################################
 ### CC13xx/CC26xx CPU files
 
+# Both ccfg-conf.c and startup_cc13xx_cc26xx_gcc.c is located locally in
+# the arch/cpu/cc13xx-cc26xx folder.
+CPU_START_SOURCEFILES += ccfg-conf.c startup_cc13xx_cc26xx_gcc.c
+
 # CPU-dependent source files
 CONTIKI_CPU_SOURCEFILES += rtimer-arch.c    clock-arch.c
 CONTIKI_CPU_SOURCEFILES += watchdog-arch.c  dbg-arch.c
@@ -94,6 +83,14 @@ endif
 ################################################################################
 ### Modules and paths
 
+# Core SDK paths
+SDK_NORTOS  := $(CORE_SDK)/kernel/nortos
+SDK_SOURCE  := $(CORE_SDK)/source
+SDK_DRIVERS := $(CORE_SDK)/source/ti/drivers
+SDK_DEVICES := $(CORE_SDK)/source/ti/devices/$(SDK_DEVICES_NAME)
+
+EXTERNALDIRS += $(SDK_SOURCE) $(SDK_NORTOS)
+
 # CPU-dependent debug source files
 MODULES += os/lib/dbg-io
 
@@ -103,6 +100,19 @@ CONTIKI_CPU_DIRS += rf rf-settings rf-settings/$(DEVICE_FAMILY_LC)
 
 CONTIKI_SOURCEFILES += $(CONTIKI_CPU_SOURCEFILES) $(DEBUG_IO_SOURCEFILES)
 
+################################################################################
+### Compiler configuration
+
+# A weird behaviour of GCC garbage collector has been observed, where
+# unitialized global variables with global linkage (aka non-static) put in the
+# COMMON section weren't analyzed by the garbage collector at all. No idea why.
+# The solution is to disable the common section, which subsequently places all
+# unitialized global variables with global linkage in the .bss section,
+# allowing the GC to analyze the variables. This is especially an issue with
+# Board.h files, as they rely heavily on global variables placed in COMMON to
+# be garbage collected if unused.
+CFLAGS += -fno-common
+
 ################################################################################
 ### Linker configuration
 
@@ -111,8 +121,12 @@ LDFLAGS += --entry resetISR
 LDFLAGS += -static
 LDFLAGS += --specs=nano.specs
 
+# Linker script
 LDSCRIPT := $(CONTIKI_CPU)/$(SUBFAMILY)/$(SUBFAMILY).lds
 
+# Globally linked libraries
+TARGET_LIBFILES += -lc -lgcc -lnosys
+
 ################################################################################
 ### Specialized build targets
 
@@ -130,5 +144,8 @@ $(OBJECTDIR)/ccfg-conf.o: ccfg-conf.c FORCE | $(OBJECTDIR)
 	$(TRACE_CC)
 	$(Q)$(CC) $(CFLAGS) -c $< -o $@
 
-# Include the Sub-family specific Makefile
+################################################################################
+### Sub-family Makefile
+
+# Include the Sub-family Makefile specific for the specified device
 include $(CONTIKI_CPU)/$(SUBFAMILY)/Makefile.$(SUBFAMILY)

os/sys/timer.c

@@ -84,9 +84,7 @@ timer_set(struct timer *t, clock_time_t interval)
 void
 timer_reset(struct timer *t)
 {
-  if(timer_expired(t)) {
+  t->start += t->interval;
-    t->start += t->interval;
-  }
 }
 /*---------------------------------------------------------------------------*/
 /**