#############################
# Default Compiler Settings #
#############################
#
# This module applies compiler flags that are commonly used on Embedded Artistry projects.

include(${CMAKE_CURRENT_LIST_DIR}/CheckAndApplyFlags.cmake)

if(CMAKE_CROSSCOMPILING AND (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"))
	# We know who we are, and can just apply supported flags
	add_compile_options(
		# Base Warnings
		-Wall
		-Wextra
		# Diagnostics
		-fdiagnostics-show-option
		# Disabled Warnings
		-Wno-padded
		# Desired Warnings
		-Wfloat-equal
		-Wconversion
		-Wlogical-op
		-Wundef
		-Wredundant-decls
		-Wshadow
		-Wstrict-overflow=2
		-Wwrite-strings
		-Wpointer-arith
		-Wcast-qual
		-Wformat=2
		-Wformat-truncation
		-Wmissing-include-dirs
		-Wcast-align
		-Wswitch-enum
		-Wsign-conversion
		-Wdisabled-optimization
		-Winline
		-Winvalid-pch
		-Wmissing-declarations
		-Wdouble-promotion
		-Wshadow
		-Wtrampolines
		-Wvector-operation-performance
		-Wshift-overflow=2
		-Wnull-dereference
		-Wduplicated-cond
		-Wshift-overflow=2
		-Wnull-dereference
		-Wduplicated-cond
		-Wcast-align=strict
		-Wno-psabi
		# C++ Flags
		$<$<COMPILE_LANGUAGE:CXX>:-Wold-style-cast>
		$<$<COMPILE_LANGUAGE:CXX>:-Wnon-virtual-dtor>
		$<$<COMPILE_LANGUAGE:CXX>:-Wctor-dtor-privacy>
		$<$<COMPILE_LANGUAGE:CXX>:-Woverloaded-virtual>
		$<$<COMPILE_LANGUAGE:CXX>:-Wnoexcept>
		$<$<COMPILE_LANGUAGE:CXX>:-Wstrict-null-sentinel>
		$<$<COMPILE_LANGUAGE:CXX>:-Wuseless-cast>
		$<$<COMPILE_LANGUAGE:CXX>:-Wzero-as-null-pointer-constant>
		$<$<COMPILE_LANGUAGE:CXX>:-Wextra-semi>
		# Compiler optimization flags
		-ffunction-sections # Place each function in its own section (ELF Only)
		-fdata-sections # Place each data in its own section (ELF Only)
		$<$<COMPILE_LANGUAGE:CXX>:-fdevirtualize> # Attempt to convert calls to virtual functions to direct calls
	)

	return()
endif()

# These are warning/diagnostic settings that we want to apply on our projects
set(desired_common_warning_flags
	# Base Warnings
	-Wall
	-Wextra
	# Diagnostics
	-fdiagnostics-show-option
	-fcolor-diagnostics
	# Disabled Warnings
	-Wno-padded
	# Desired Warnings
	-Wfloat-equal
	-Wconversion
	-Wlogical-op
	-Wundef
	-Wredundant-decls
	-Wshadow
	-Wstrict-overflow=2
	-Wwrite-strings
	-Wpointer-arith
	-Wcast-qual
	-Wformat=2
	-Wformat-truncation
	-Wmissing-include-dirs
	-Wcast-align
	-Wswitch-enum
	-Wsign-conversion
	-Wdisabled-optimization
	-Winline
	-Winvalid-pch
	-Wmissing-declarations
	-Wdouble-promotion
	-Wshadow
	-Wtrampolines
	-Wvector-operation-performance
	-Wshift-overflow=2
	-Wnull-dereference
	-Wduplicated-cond
	-Wshift-overflow=2
	-Wnull-dereference
	-Wduplicated-cond
	-Wcast-align=strict
	-Werror=return-type
)

set(desired_cpp_warning_flags
	-Wold-style-cast
	-Wnon-virtual-dtor
	-Wctor-dtor-privacy
	-Woverloaded-virtual
	-Wnoexcept
	-Wstrict-null-sentinel
	-Wuseless-cast
	-Wzero-as-null-pointer-constant
	-Wextra-semi
)

set(desired_common_compiler_optimization_flags
	-ffunction-sections # Place each function in its own section (ELF Only)
	-fdata-sections # Place each data in its own section (ELF Only)
	-fdevirtualize # Attempt to convert calls to virtual functions to direct calls
)

####################################################
# Settings enforced when we're the primary project #
####################################################

if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
  apply_supported_compiler_flags_globally(C desired_common_warning_flags)
  apply_supported_compiler_flags_globally(CXX desired_common_warning_flags)
  apply_supported_compiler_flags_globally(CXX desired_cpp_warning_flags)
  apply_supported_compiler_flags_globally(C desired_common_compiler_optimization_flags)
  apply_supported_compiler_flags_globally(CXX desired_common_compiler_optimization_flags)
endif()

####################################
# Settings enforced no matter what #
####################################

apply_supported_compiler_flags_globally(C "-Wno-unknown-pragmas")
apply_supported_compiler_flags_globally(CXX "-Wno-unknown-pragmas")