Make error 'CORE_PIN0_PORTSET' was not declared in this scope

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PDOS

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I have been trying out Morton's make template for Teensy. https://github.com/apmorton/teensy-template
I get the following errors(excerpt below).
For the life of me I cannot find where these symbols are declared. I would be most grateful for some pointers that might help me solve this. For example, where is 'CORE_PIN0_PORTSET' declared?

Sampling of the errors
Code: 
peter@Viki:~/Arduino/teensy-template-master$ make
-e [CXX]	src/Blink.ino
In file included from teensy4/wiring.h:39:0,
                 from teensy4/WProgram.h:45,
                 from teensy4/Arduino.h:6,
                 from <command-line>:0:
teensy4/core_pins.h: In function 'void digitalWriteFast(uint8_t, uint8_t)':
teensy4/core_pins.h:1066:5: error: 'CORE_PIN0_PORTSET' was not declared in this scope
     CORE_PIN0_PORTSET = CORE_PIN0_BITMASK;
     ^
teensy4/core_pins.h:1066:25: error: 'CORE_PIN0_BITMASK' was not declared in this scope
     CORE_PIN0_PORTSET = CORE_PIN0_BITMASK;
                         ^
teensy4/core_pins.h:1068:5: error: 'CORE_PIN1_PORTSET' was not declared in this scope
     CORE_PIN1_PORTSET = CORE_PIN1_BITMASK;

Makefile
Code: 
# The name of your project (used to name the compiled .hex file)
TARGET = $(notdir $(CURDIR))

# The teensy version to use, 30, 31, 35, 36, or LC
TEENSY = 40

# Set to 24000000, 48000000, or 96000000 to set CPU core speed
TEENSY_CORE_SPEED = 48000000

# Some libraries will require this to be defined
# If you define this, you will break the default main.cpp
#ARDUINO = 10600

# configurable options
OPTIONS = -DUSB_SERIAL -DLAYOUT_US_ENGLISH

# directory to build in
BUILDDIR = $(abspath $(CURDIR)/build)

#************************************************************************
# Location of Teensyduino utilities, Toolchain, and Arduino Libraries.
# To use this makefile without Arduino, copy the resources from these
# locations and edit the pathnames.  The rest of Arduino is not needed.
#************************************************************************

# path location for Teensy Loader, teensy_post_compile and teensy_reboot
TOOLSPATH = $(CURDIR)/tools

ifeq ($(OS),Windows_NT)
    $(error What is Win Dose?)
else
    UNAME_S := $(shell uname -s)
    ifeq ($(UNAME_S),Darwin)
        TOOLSPATH = /Applications/Arduino.app/Contents/Java/hardware/tools/
    endif
endif

# path location for Teensy 3 core
COREPATH = teensy4

# path location for Arduino libraries
LIBRARYPATH = libraries

# path location for the arm-none-eabi compiler
COMPILERPATH = $(TOOLSPATH)/arm/bin

#************************************************************************
# Settings below this point usually do not need to be edited
#************************************************************************

# CPPFLAGS = compiler options for C and C++
CPPFLAGS = -Wall -g -Os -mthumb -ffunction-sections -fdata-sections -nostdlib -MMD $(OPTIONS) -DTEENSYDUINO=124 -DF_CPU=$(TEENSY_CORE_SPEED) -Isrc -I$(COREPATH)
#CPPFLAGS = -Wall -g -O2 $(CPUOPTIONS) -MMD $(OPTIONS) -I. -ffunction-sections -fdata-sections  -Isrc -I$(COREPATH)

# compiler options for C++ only
#CXXFLAGS = -std=gnu++0x -felide-constructors -fno-exceptions -fno-rtti -fpermissive
#CXXFLAGS = -std=gnu++14 -felide-constructors -fno-exceptions -fpermissive -fno-rtti -Wno-error=narrowing
CXXFLAGS = -std=gnu++0x -felide-constructors -fno-exceptions -fpermissive -fno-rtti -Wno-error=narrowing

# compiler options for C only
CFLAGS =

# linker options
LDFLAGS = -Os -Wl,--gc-sections -mthumb

# additional libraries to link
LIBS = -lm

# compiler options specific to teensy version
ifeq ($(TEENSY), 30)
    CPPFLAGS += -D__MK20DX128__ -mcpu=cortex-m4
    LDSCRIPT = $(COREPATH)/mk20dx128.ld
    LDFLAGS += -mcpu=cortex-m4 -T$(LDSCRIPT)
else ifeq ($(TEENSY), 31)
    CPPFLAGS += -D__MK20DX256__ -mcpu=cortex-m4
    LDSCRIPT = $(COREPATH)/mk20dx256.ld
    LDFLAGS += -mcpu=cortex-m4 -T$(LDSCRIPT)
else ifeq ($(TEENSY), LC)
    CPPFLAGS += -D__MKL26Z64__ -mcpu=cortex-m0plus
    LDSCRIPT = $(COREPATH)/mkl26z64.ld
    LDFLAGS += -mcpu=cortex-m0plus -T$(LDSCRIPT)
    LIBS += -larm_cortexM0l_math
else ifeq ($(TEENSY), 35)
    CPPFLAGS += -D__MK64FX512__ -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
    LDSCRIPT = $(COREPATH)/mk64fx512.ld
    LDFLAGS += -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -T$(LDSCRIPT)
    LIBS += -larm_cortexM4lf_math
else ifeq ($(TEENSY), 36)
    CPPFLAGS += -D__MK66FX1M0__ -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
    LDSCRIPT = $(COREPATH)/mk66fx1m0.ld
    LDFLAGS += -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -T$(LDSCRIPT)
    LIBS += -larm_cortexM4lf_math
else ifeq ($(TEENSY), 40)   
    CPPFLAGS += -D__MK66FX1M0__ -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv4-sp-d16
    LDSCRIPT = $(COREPATH)/imxrt1062.ld
    LDFLAGS += -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -T$(LDSCRIPT)
    LIBS += -larm_cortexM7lf_math
    LIBS += -larm_cortexM7lfsp_math -lm -lstdc++
else
    $(error Invalid setting for TEENSY)
endif

# set arduino define if given
ifdef ARDUINO
	CPPFLAGS += -DARDUINO=$(ARDUINO)
else
	CPPFLAGS += -DUSING_MAKEFILE
endif

# names for the compiler programs
CC = $(abspath $(COMPILERPATH))/arm-none-eabi-gcc
CXX = $(abspath $(COMPILERPATH))/arm-none-eabi-g++
OBJCOPY = $(abspath $(COMPILERPATH))/arm-none-eabi-objcopy
SIZE = $(abspath $(COMPILERPATH))/arm-none-eabi-size

# automatically create lists of the sources and objects
LC_FILES := $(wildcard $(LIBRARYPATH)/*/*.c)
LCPP_FILES := $(wildcard $(LIBRARYPATH)/*/*.cpp)
TC_FILES := $(wildcard $(COREPATH)/*.c)
TCPP_FILES := $(wildcard $(COREPATH)/*.cpp)
C_FILES := $(wildcard src/*.c)
CPP_FILES := $(wildcard src/*.cpp)
INO_FILES := $(wildcard src/*.ino)

# include paths for libraries
L_INC := $(foreach lib,$(filter %/, $(wildcard $(LIBRARYPATH)/*/)), -I$(lib))

SOURCES := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o) $(INO_FILES:.ino=.o) $(TC_FILES:.c=.o) $(TCPP_FILES:.cpp=.o) $(LC_FILES:.c=.o) $(LCPP_FILES:.cpp=.o)
OBJS := $(foreach src,$(SOURCES), $(BUILDDIR)/$(src))

all: hex

build: $(TARGET).elf

hex: $(TARGET).hex

post_compile: $(TARGET).hex
	@$(abspath $(TOOLSPATH))/teensy_post_compile -file="$(basename $<)" -path=$(CURDIR) -tools="$(abspath $(TOOLSPATH))"

reboot:
	@-$(abspath $(TOOLSPATH))/teensy_reboot

upload: post_compile reboot

$(BUILDDIR)/%.o: %.c
	@echo -e "[CC]\t$<"
	@mkdir -p "$(dir $@)"
	@$(CC) $(CPPFLAGS) $(CFLAGS) $(L_INC) -o "$@" -c "$<"

$(BUILDDIR)/%.o: %.cpp
	@echo -e "[CXX]\t$<"
	@mkdir -p "$(dir $@)"
	@$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(L_INC) -o "$@" -c "$<"

$(BUILDDIR)/%.o: %.ino
	@echo -e "[CXX]\t$<"
	@mkdir -p "$(dir $@)"
	@$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(L_INC) -o "$@" -x c++ -include Arduino.h -c "$<"

$(TARGET).elf: $(OBJS) $(LDSCRIPT)
	@echo -e "[LD]\t$@"
	@$(CC) $(LDFLAGS) -o "$@" $(OBJS) $(LIBS)

%.hex: %.elf
	@echo -e "[HEX]\t$@"
	@$(SIZE) "$<"
	@$(OBJCOPY) -O ihex -R .eeprom "$<" "$@"

# compiler generated dependency info
-include $(OBJS:.o=.d)

clean:
	@echo Cleaning...
	@rm -rf "$(BUILDDIR)"
	@rm -f "$(TARGET).elf" "$(TARGET).hex"
 
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