#
# Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
#
# This file is part of PortaPack.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#

##############################################################################
# Build global options
# NOTE: Can be overridden externally.
#

enable_language(C CXX ASM)

project(bootstrap)

# Compiler options here.
set(USE_OPT "-Os -g -falign-functions=16 -fno-math-errno --specs=nano.specs")

# C specific options here (added to USE_OPT).
set(USE_COPT "-std=gnu99")

# C++ specific options here (added to USE_OPT).
set(USE_CPPOPT "-std=c++14 -fno-rtti -fno-exceptions -Weffc++ -Wuninitialized")

# Enable this if you want the linker to remove unused code and data
set(USE_LINK_GC yes)

# Linker extra options here.
set(USE_LDOPT)

# Enable this if you want link time optimizations (LTO)
set(USE_LTO no)

# If enabled, this option allows to compile the application in THUMB mode.
set(USE_THUMB yes)

# Enable this if you want to see the full log while compiling.
set(USE_VERBOSE_COMPILE no)

#
# Build global options
##############################################################################

##############################################################################
# Architecture or project specific options
#

# Enables the use of FPU on Cortex-M4 (no, softfp, hard).
set(USE_FPU no)

#
# Architecture or project specific options
##############################################################################

##############################################################################
# Project, sources and paths
#

# Define linker script file here
set(LDSCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/m4.ld)

# C sources that can be compiled in ARM or THUMB mode depending on the global
# setting.
set(CSRC
	bootstrap.c
)

# C++ sources that can be compiled in ARM or THUMB mode depending on the global
# setting.
set(CPPSRC)

# C sources to be compiled in ARM mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
#       option that results in lower performance and larger code size.
set(ACSRC)

# C++ sources to be compiled in ARM mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
#       option that results in lower performance and larger code size.
set(ACPPSRC)

# C sources to be compiled in THUMB mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
#       option that results in lower performance and larger code size.
set(TCSRC)

# C sources to be compiled in THUMB mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
#       option that results in lower performance and larger code size.
set(TCPPSRC)

# List ASM source files here
set(ASMSRC startup_ARMCM4.S)

set(INCDIR
	${CHIBIOS}/os/ports/common/ARMCMx/CMSIS/include
	${CHIBIOS}/os/ports/common/ARMCMx
	${CHIBIOS_PORTAPACK}/os/hal/platforms/LPC43xx
	${CHIBIOS_PORTAPACK}/os/hal/platforms/LPC43xx_M4
)

#
# Project, sources and paths
##############################################################################

##############################################################################
# Compiler settings
#

set(MCU cortex-m4)

# ARM-specific options here
set(AOPT)

# THUMB-specific options here
set(TOPT "-mthumb -DTHUMB")

# Define C warning options here
set(CWARN "-Wall -Wextra -Wstrict-prototypes")

# Define C++ warning options here
set(CPPWARN "-Wall -Wextra")

#
# Compiler settings
##############################################################################

##############################################################################
# Start of default section
#

# List all default C defines here, like -D_DEBUG=1
# TODO: Switch -DCRT0_INIT_DATA depending on load from RAM or SPIFI?
# NOTE: _RANDOM_TCC to kill a GCC 4.9.3 error with std::max argument types
set(DDEFS -DLPC43XX -DLPC43XX_M4 -D__START=main -DGIT_REVISION=\"${GIT_REVISION}\")

# List all default ASM defines here, like -D_DEBUG=1
set(DADEFS)

# List all default directories to look for include files here
set(DINCDIR)

# List the default directory to look for the libraries here
set(DLIBDIR)

# List all default libraries here
set(DLIBS)

#
# End of default section
##############################################################################

##############################################################################
# Start of user section
#

# List all user C define here, like -D_DEBUG=1
set(UDEFS)

# Define ASM defines here
set(UADEFS)

# List all user directories here
set(UINCDIR)

# List the user directory to look for the libraries here
set(ULIBDIR)

# List all user libraries here
set(ULIBS)

#
# End of user defines
##############################################################################

set(RULESPATH ${CHIBIOS}/os/ports/GCC/ARMCMx)
include(${RULESPATH}/rules.cmake)

##############################################################################

add_executable(${PROJECT_NAME}.elf ${CSRC} ${CPPSRC} ${ASMSRC})
set_target_properties(${PROJECT_NAME}.elf PROPERTIES LINK_DEPENDS ${LDSCRIPT})
add_definitions(${DEFS})
include_directories(. ${INCDIR})
link_directories(${LLIBDIR})
target_link_libraries(${PROJECT_NAME}.elf ${LIBS})

add_custom_command(
	OUTPUT ${PROJECT_NAME}.bin
	COMMAND ${CMAKE_OBJCOPY} -O binary ${PROJECT_NAME}.elf ${PROJECT_NAME}.bin
	DEPENDS ${PROJECT_NAME}.elf
)

add_custom_target(
	bootstrap
	DEPENDS ${PROJECT_NAME}.bin
)