move make to examples/build_system

add -Wl,--no-warn-rwx-segment for gcc 12+

examples/build_system/make/toolchain/arm_gcc.mk

@@ -9,6 +9,8 @@ GDB = $(CROSS_COMPILE)gdb
 OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size
 
+CC_VERSION := $(shell $(CC) -dumpversion)
+
 # ---------------------------------------
 # Compiler Flags
 # ---------------------------------------
@@ -65,7 +67,12 @@ LDFLAGS += \
   -Wl,-cref \
   -Wl,-gc-sections \
 
-# Some toolchain such as renesas rx does not support --print-memory-usage flags
+# renesas rx does not support --print-memory-usage flags
 ifneq ($(FAMILY),rx)
 LDFLAGS += -Wl,--print-memory-usage
 endif
+
+# from version 12
+ifeq (12,$(firstword $(sort 12 $(CC_VERSION))))
+LDFLAGS += -Wl,--no-warn-rwx-segment
+endif

examples/make.mk

@@ -2,14 +2,10 @@
 # Common make definition for all examples
 # ---------------------------------------
 
-# Supported toolchain: gcc, iar
-TOOLCHAIN ?= gcc
-
 #-------------- TOP and CURRENT_PATH ------------
 
-# Set TOP to be the path to get from the current directory (where make was
+# Set TOP to be the path to get from the current directory (where make was invoked) to the top of the tree.
-# invoked) to the top of the tree. $(lastword $(MAKEFILE_LIST)) returns
+# $(lastword $(MAKEFILE_LIST)) returns the name of this makefile relative to where make was invoked.
-# the name of this makefile relative to where make was invoked.
 THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST))
 
 # strip off /tools/top.mk to get for example ../../..
@@ -38,7 +34,6 @@ __check_defined = \
     $(if $(value $1),, \
     $(error Undefined make flag: $1$(if $2, ($2))))
 
-
 # Build directory
 BUILD := _build/$(BOARD)
 
@@ -73,7 +68,10 @@ else
   SRC_C += $(subst $(TOP)/,,$(wildcard $(TOP)/$(FAMILY_PATH)/*.c))
 endif
 
-#-------------- Cross Compiler  ------------
+#-------------- Toolchain  ------------
+
+# Supported toolchain: gcc, iar
+TOOLCHAIN ?= gcc
 
 # Can be set by board, default to ARM GCC
 CROSS_COMPILE ?= arm-none-eabi-
@@ -139,8 +137,8 @@ endif
 
 # CPU specific flags
 ifdef CPU_CORE
-include $(TOP)/tools/make/cpu/$(CPU_CORE).mk
+  include ${TOP}/examples/build_system/make/cpu/$(CPU_CORE).mk
 endif
 
 # toolchain specific
-include $(TOP)/tools/make/toolchain/arm_$(TOOLCHAIN).mk
+include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN).mk

examples/rules.mk

@@ -37,7 +37,7 @@ vpath %.c . $(TOP)
 vpath %.s . $(TOP)
 vpath %.S . $(TOP)
 
-include $(TOP)/tools/make/toolchain/arm_$(TOOLCHAIN)_rules.mk
+include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN)_rules.mk
 
 
 OBJ_DIRS = $(sort $(dir $(OBJ)))

tools/build_family.py

@@ -34,6 +34,7 @@ def build_family(example, family, make_option):
         # sum all element of same index (column sum)
         return list(map(sum, list(zip(*result))))
 
+
 if __name__ == '__main__':
     # IAR CC
     if make_iar_option not in sys.argv:
@@ -44,7 +45,7 @@ if __name__ == '__main__':
     for d in os.scandir("examples"):
         if d.is_dir() and 'cmake' not in d.name:
             for entry in os.scandir(d.path):
-                if entry.is_dir() and 'cmake' not in entry.name:
+                if entry.is_dir() and 'cmake' not in entry.name and entry.name != 'build_system':
                     all_examples.append(d.name + '/' + entry.name)
     filter_with_input(all_examples)
     all_examples.sort()