Apple-2-HW/unified_retro_keyboard
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9aa3bf4681
unified_retro_keyboard/firmware/asdf/cmake/generic-gcc-avr.cmake
Dave 9aa3bf4681 Fix compiler warning for GCC >= 11.3 
- GCC version 12 generates a warnings for certain pointer
references.  Apparently this is to decect invalid offsets.  To properly
compiler, the recommended remedy is to add the compiler option
"--param=min-pagesize=0" to the flags.  This option was introduced in
version 11.3, so we need to check the compiler version and only add for
>11.3.

- Moved setting of compiler flags to a new function c_toolchain_flags in
the toolchain file "generic-gcc-avr.cmake".  This function is now called
from the CMakeLists.txt file in the src directory.  This allows the test
for the compiler version to be specified in the toolchain file, but not
executed until called by the src subdir CMakeLists.txt.  Delaying
evaluation of the function ensures that the CMAKE_C_VERSION variable is
properly set when the function is called.

- Moving the compiler flags out of the source dir CMakeLists.txt file
also improves portability by moving architecture-specific compiler
details from the source tree to the toolchain file.
2022-09-02 00:00:55 -05:00

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CMake
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##########################################################################
# "THE ANY BEVERAGE-WARE LICENSE" (Revision 42 - based on beer-ware
# license):
# <dev@layer128.net> wrote this file. As long as you retain this notice
# you can do whatever you want with this stuff. If we meet some day, and
# you think this stuff is worth it, you can buy me a be(ve)er(age) in
# return. (I don't like beer much.)
#
# Matthias Kleemann
##########################################################################
##########################################################################
# The toolchain requires some variables set.
#
# AVR_MCU (default: atmega8)
# the type of AVR the application is built for
# AVR_L_FUSE (NO DEFAULT)
# the LOW fuse value for the MCU used
# AVR_H_FUSE (NO DEFAULT)
# the HIGH fuse value for the MCU used
# AVR_UPLOADTOOL (default: avrdude)
# the application used to upload to the MCU
# NOTE: The toolchain is currently quite specific about
# the commands used, so it needs tweaking.
# AVR_UPLOADTOOL_PORT (default: usb)
# the port used for the upload tool, e.g. usb
# AVR_PROGRAMMER (default: avrispmkII)
# the programmer hardware used, e.g. avrispmkII
##########################################################################
##########################################################################
# options
##########################################################################
#option(WITH_MCU "Add the mCU type to the target file name." OFF)
##########################################################################
# executables in use
##########################################################################
find_program(AVR_CC avr-gcc)
find_program(AVR_CXX avr-g++)
find_program(AVR_OBJCOPY avr-objcopy)
find_program(AVR_SIZE_TOOL avr-size)
find_program(AVR_OBJDUMP avr-objdump)
##########################################################################
# toolchain starts with defining mandatory variables
##########################################################################
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR avr)
set(CMAKE_C_COMPILER ${AVR_CC})
set(CMAKE_CXX_COMPILER ${AVR_CXX})
##########################################################################
# Identification
##########################################################################
set(AVR 1)
##########################################################################
# some necessary tools and variables for AVR builds, which may not
# defined yet
# - AVR_UPLOADTOOL
# - AVR_UPLOADTOOL_PORT
# - AVR_PROGRAMMER
# - AVR_MCU
# - AVR_SIZE_ARGS
##########################################################################
# default upload tool
if(NOT AVR_UPLOADTOOL)
set(
AVR_UPLOADTOOL avrdude
CACHE STRING "Set default upload tool: avrdude"
)
find_program(AVR_UPLOADTOOL avrdude)
endif(NOT AVR_UPLOADTOOL)
# default upload tool port
if(NOT AVR_UPLOADTOOL_PORT)
set(
AVR_UPLOADTOOL_PORT usb
CACHE STRING "Set default upload tool port: usb"
)
endif(NOT AVR_UPLOADTOOL_PORT)
# default programmer (hardware)
if(NOT AVR_PROGRAMMER)
set(
AVR_PROGRAMMER avrispmkII
CACHE STRING "Set default programmer hardware model: avrispmkII"
)
endif(NOT AVR_PROGRAMMER)
# default MCU (chip)
if(NOT AVR_MCU)
set(
AVR_MCU atmega8
CACHE STRING "Set default MCU: atmega8 (see 'avr-gcc --target-help' for valid values)"
)
endif(NOT AVR_MCU)
#default avr-size args
if(NOT AVR_SIZE_ARGS)
if(APPLE)
set(AVR_SIZE_ARGS -B)
else(APPLE)
set(AVR_SIZE_ARGS -C;--mcu=${AVR_MCU})
endif(APPLE)
endif(NOT AVR_SIZE_ARGS)
# prepare base flags for upload tool
set(AVR_UPLOADTOOL_BASE_OPTIONS -p ${AVR_MCU} -c ${AVR_PROGRAMMER})
# use AVR_UPLOADTOOL_BAUDRATE as baudrate for upload tool (if defined)
if(AVR_UPLOADTOOL_BAUDRATE)
set(AVR_UPLOADTOOL_BASE_OPTIONS ${AVR_UPLOADTOOL_BASE_OPTIONS} -b ${AVR_UPLOADTOOL_BAUDRATE})
endif()
##########################################################################
# check build types:
# - Debug
# - Release
# - RelWithDebInfo
#
# Release is chosen, because of some optimized functions in the
# AVR toolchain, e.g. _delay_ms().
##########################################################################
if(NOT ((CMAKE_BUILD_TYPE MATCHES Release) OR
(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo) OR
(CMAKE_BUILD_TYPE MATCHES Debug) OR
(CMAKE_BUILD_TYPE MATCHES MinSizeRel)))
set(
CMAKE_BUILD_TYPE Release
CACHE STRING "Choose cmake build type: Debug Release RelWithDebInfo MinSizeRel"
FORCE
)
endif(NOT ((CMAKE_BUILD_TYPE MATCHES Release) OR
(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo) OR
(CMAKE_BUILD_TYPE MATCHES Debug) OR
(CMAKE_BUILD_TYPE MATCHES MinSizeRel)))
##########################################################################
##########################################################################
# target file name add-on
##########################################################################
if(WITH_MCU)
set(MCU_TYPE_FOR_FILENAME "-${AVR_MCU}")
else(WITH_MCU)
set(MCU_TYPE_FOR_FILENAME "")
endif(WITH_MCU)
function(c_toolchain_flags)
# fix array base indexing beginning in AVR-GCC 12:
list(APPEND TOOLCHAIN_FLAGS
-std=c99
# -Wa,-adhln
-Wall
-funsigned-char
-funsigned-bitfields
-ffunction-sections
-fdata-sections
-fpack-struct
-fshort-enums
-O2
-Wall
-Wextra
-Wpointer-arith
-Wcast-align
-Wwrite-strings
-Wswitch-default
-Wunreachable-code
-Winit-self
-Wmissing-field-initializers
-Wno-unknown-pragmas
-Wstrict-prototypes
-Wundef
-Wold-style-definition
)
if(CMAKE_C_COMPILER_VERSION GREATER_EQUAL "11.3")
message(STATUS "Appending page size fix for GCC >= 11.3")
list(APPEND TOOLCHAIN_FLAGS --param=min-pagesize=0)
endif()
set(CFLAGS ${TOOLCHAIN_FLAGS} PARENT_SCOPE)
endfunction(c_toolchain_flags)
##########################################################################
# add_avr_executable
# - IN_VAR: EXECUTABLE_NAME
#
# Creates targets and dependencies for AVR toolchain, building an
# executable. Calls add_executable with ELF file as target name, so
# any link dependencies need to be using that target, e.g. for
# target_link_libraries(<EXECUTABLE_NAME>-${AVR_MCU}.elf ...).
#
##########################################################################
function(add_avr_executable EXECUTABLE_NAME)
message(STATUS "target name: ${EXECUTABLE_NAME}")
if(NOT ARGN)
message(FATAL_ERROR "No source files given for ${EXECUTABLE_NAME}.")
endif(NOT ARGN)
# set file names
set(elf_file ${EXECUTABLE_NAME}${MCU_TYPE_FOR_FILENAME}.elf)
set(hex_file ${EXECUTABLE_NAME}${MCU_TYPE_FOR_FILENAME}.hex)
set(lst_file ${EXECUTABLE_NAME}${MCU_TYPE_FOR_FILENAME}.lst)
set(map_file ${EXECUTABLE_NAME}${MCU_TYPE_FOR_FILENAME}.map)
set(eeprom_image ${EXECUTABLE_NAME}${MCU_TYPE_FOR_FILENAME}-eeprom.hex)
message(STATUS "elf name: ${elf_file}")
# elf file
add_executable(${elf_file} EXCLUDE_FROM_ALL ${ARGN})
set_target_properties(
${elf_file}
PROPERTIES
COMPILE_FLAGS "-mmcu=${AVR_MCU}"
LINK_FLAGS "-mmcu=${AVR_MCU} -Wl,--gc-sections -mrelax -Wl,-Map,${map_file}"
)
add_custom_command(
OUTPUT ${hex_file}
COMMAND
${AVR_OBJCOPY} -j .text -j .data -O ihex ${elf_file} ${hex_file}
COMMAND
${AVR_SIZE_TOOL} ${AVR_SIZE_ARGS} ${elf_file}
DEPENDS ${elf_file}
)
add_custom_command(
OUTPUT ${lst_file}
COMMAND
${AVR_OBJDUMP} -d ${elf_file} > ${lst_file}
DEPENDS ${elf_file}
)
# eeprom
add_custom_command(
OUTPUT ${eeprom_image}
COMMAND
${AVR_OBJCOPY} -j .eeprom --set-section-flags=.eeprom=alloc,load
--change-section-lma .eeprom=0 --no-change-warnings
-O ihex ${elf_file} ${eeprom_image}
DEPENDS ${elf_file}
)
add_custom_target(
${EXECUTABLE_NAME}
ALL
DEPENDS ${hex_file} ${lst_file} ${eeprom_image}
)
set_target_properties(
${EXECUTABLE_NAME}
PROPERTIES
OUTPUT_NAME "${elf_file}"
)
# clean
get_directory_property(clean_files ADDITIONAL_MAKE_CLEAN_FILES)
set_directory_properties(
PROPERTIES
ADDITIONAL_MAKE_CLEAN_FILES "${map_file}"
)
# upload - with avrdude
add_custom_target(
upload_${EXECUTABLE_NAME}
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} ${AVR_UPLOADTOOL_OPTIONS}
-U flash:w:${hex_file}
-P ${AVR_UPLOADTOOL_PORT}
DEPENDS ${hex_file}
COMMENT "Uploading ${hex_file} to ${AVR_MCU} using ${AVR_PROGRAMMER}"
)
# upload eeprom only - with avrdude
# see also bug http://savannah.nongnu.org/bugs/?40142
add_custom_target(
upload_${EXECUTABLE_NAME}_eeprom
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} ${AVR_UPLOADTOOL_OPTIONS}
-U eeprom:w:${eeprom_image}
-P ${AVR_UPLOADTOOL_PORT}
DEPENDS ${eeprom_image}
COMMENT "Uploading ${eeprom_image} to ${AVR_MCU} using ${AVR_PROGRAMMER}"
)
# disassemble
add_custom_target(
disassemble_${EXECUTABLE_NAME}
${AVR_OBJDUMP} -h -S ${elf_file} > ${EXECUTABLE_NAME}.lst
DEPENDS ${elf_file}
)
endfunction(add_avr_executable)
##########################################################################
# add_avr_library
# - IN_VAR: LIBRARY_NAME
#
# Calls add_library with an optionally concatenated name
# <LIBRARY_NAME>${MCU_TYPE_FOR_FILENAME}.
# This needs to be used for linking against the library, e.g. calling
# target_link_libraries(...).
##########################################################################
function(add_avr_library LIBRARY_NAME)
if(NOT ARGN)
message(FATAL_ERROR "No source files given for ${LIBRARY_NAME}.")
endif(NOT ARGN)
set(lib_file ${LIBRARY_NAME}${MCU_TYPE_FOR_FILENAME})
add_library(${lib_file} STATIC ${ARGN})
set_target_properties(
${lib_file}
PROPERTIES
COMPILE_FLAGS "-mmcu=${AVR_MCU}"
OUTPUT_NAME "${lib_file}"
)
if(NOT TARGET ${LIBRARY_NAME})
add_custom_target(
${LIBRARY_NAME}
ALL
DEPENDS ${lib_file}
)
set_target_properties(
${LIBRARY_NAME}
PROPERTIES
OUTPUT_NAME "${lib_file}"
)
endif(NOT TARGET ${LIBRARY_NAME})
endfunction(add_avr_library)
##########################################################################
# avr_target_link_libraries
# - IN_VAR: EXECUTABLE_TARGET
# - ARGN : targets and files to link to
#
# Calls target_link_libraries with AVR target names (concatenation,
# extensions and so on.
##########################################################################
function(avr_target_link_libraries EXECUTABLE_TARGET)
if(NOT ARGN)
message(FATAL_ERROR "Nothing to link to ${EXECUTABLE_TARGET}.")
endif(NOT ARGN)
get_target_property(TARGET_LIST ${EXECUTABLE_TARGET} OUTPUT_NAME)
foreach(TGT ${ARGN})
if(TARGET ${TGT})
get_target_property(ARG_NAME ${TGT} OUTPUT_NAME)
list(APPEND NON_TARGET_LIST ${ARG_NAME})
else(TARGET ${TGT})
list(APPEND NON_TARGET_LIST ${TGT})
endif(TARGET ${TGT})
endforeach(TGT ${ARGN})
target_link_libraries(${TARGET_LIST} ${NON_TARGET_LIST})
endfunction(avr_target_link_libraries EXECUTABLE_TARGET)
##########################################################################
# avr_target_include_directories
#
# Calls target_include_directories with AVR target names
##########################################################################
function(avr_target_include_directories EXECUTABLE_TARGET)
if(NOT ARGN)
message(FATAL_ERROR "No include directories to add to ${EXECUTABLE_TARGET}.")
endif()
get_target_property(TARGET_LIST ${EXECUTABLE_TARGET} OUTPUT_NAME)
set(extra_args ${ARGN})
target_include_directories(${TARGET_LIST} ${extra_args})
endfunction()
##########################################################################
# avr_target_compile_definitions
#
# Calls target_compile_definitions with AVR target names
##########################################################################
function(avr_target_compile_definitions EXECUTABLE_TARGET)
if(NOT ARGN)
message(FATAL_ERROR "No compile definitions to add to ${EXECUTABLE_TARGET}.")
endif()
get_target_property(TARGET_LIST ${EXECUTABLE_TARGET} OUTPUT_NAME)
set(extra_args ${ARGN})
target_compile_definitions(${TARGET_LIST} ${extra_args})
endfunction()
function(avr_generate_fixed_targets)
# get status
add_custom_target(
get_status
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} -P ${AVR_UPLOADTOOL_PORT} -n -v
COMMENT "Get status from ${AVR_MCU}"
)
# get fuses
add_custom_target(
get_fuses
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} -P ${AVR_UPLOADTOOL_PORT} -n
-U lfuse:r:-:b
-U hfuse:r:-:b
COMMENT "Get fuses from ${AVR_MCU}"
)
# set fuses
add_custom_target(
set_fuses
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} -P ${AVR_UPLOADTOOL_PORT}
-U lfuse:w:${AVR_L_FUSE}:m
-U hfuse:w:${AVR_H_FUSE}:m
COMMENT "Setup: High Fuse: ${AVR_H_FUSE} Low Fuse: ${AVR_L_FUSE}"
)
# get oscillator calibration
add_custom_target(
get_calibration
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} -P ${AVR_UPLOADTOOL_PORT}
-U calibration:r:${AVR_MCU}_calib.tmp:r
COMMENT "Write calibration status of internal oscillator to ${AVR_MCU}_calib.tmp."
)
# set oscillator calibration
add_custom_target(
set_calibration
${AVR_UPLOADTOOL} ${AVR_UPLOADTOOL_BASE_OPTIONS} -P ${AVR_UPLOADTOOL_PORT}
-U calibration:w:${AVR_MCU}_calib.hex
COMMENT "Program calibration status of internal oscillator from ${AVR_MCU}_calib.hex."
)
endfunction()
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