litex

ifeq ($(TRIPLE),--native--)
TARGET_PREFIX=
else
TARGET_PREFIX=$(TRIPLE)-
endif

RM ?= rm -f
PYTHON ?= python3
CCACHE ?=

ifeq ($(CLANG),1)
CC_normal      := $(CCACHE) clang -target $(TRIPLE) -integrated-as
CX_normal      := $(CCACHE) clang++ -target $(TRIPLE) -integrated-as
else
CC_normal      := $(CCACHE) $(TARGET_PREFIX)gcc -std=gnu99
CX_normal      := $(CCACHE) $(TARGET_PREFIX)g++
endif
AR_normal      := $(TARGET_PREFIX)gcc-ar
LD_normal      := $(TARGET_PREFIX)ld
OBJCOPY_normal := $(TARGET_PREFIX)objcopy
OBJDUMP_normal := $(TARGET_PREFIX)objdump

CC_quiet      = @echo " CC      " $@ && $(CC_normal)
CX_quiet      = @echo " CX      " $@ && $(CX_normal)
AR_quiet      = @echo " AR      " $@ && $(AR_normal)
LD_quiet      = @echo " LD      " $@ && $(LD_normal)
OBJCOPY_quiet = @echo " OBJCOPY " $@ && $(OBJCOPY_normal)
OBJDUMP_quiet = @echo " OBJDUMP " $@ && $(OBJDUMP_normal)

ifeq ($(V),1)
	CC = $(CC_normal)
	CX = $(CX_normal)
	AR = $(AR_normal)
	LD = $(LD_normal)
	OBJCOPY = $(OBJCOPY_normal)
	OBJDUMP = $(OBJDUMP_normal)
else
	CC = $(CC_quiet)
	CX = $(CX_quiet)
	AR = $(AR_quiet)
	LD = $(LD_quiet)
	OBJCOPY = $(OBJCOPY_quiet)
	OBJDUMP = $(OBJDUMP_quiet)
endif

# http://scottmcpeak.com/autodepend/autodepend.html
# Generate *.d Makefile dependencies fragments, include using;
# -include $(OBJECTS:.o=.d)
DEPFLAGS += -MD -MP

# Toolchain options
#
INCLUDES = -I$(PICOLIBC_DIRECTORY)/libc/include \
           -I$(LIBBASE_DIRECTORY) \
           -I$(SOC_DIRECTORY)/software/include \
           -I$(SOC_DIRECTORY)/software \
           -I$(BUILDINC_DIRECTORY) \
           -I$(BUILDINC_DIRECTORY)/../libc \
           -I$(CPU_DIRECTORY)
# Keep C++ standard headers before picolibc headers so libstdc++'s include_next
# wrappers resolve C headers to picolibc instead of the toolchain's newlib.
CXX_STANDARD_INCLUDE_DIRS := $(shell $(CX_normal) $(CPUFLAGS) -E -x c++ - -v < /dev/null 2>&1 | sed -n '/search starts here:/,/End of search list./{s,^ ,,; /\/include\/c++\//p;}')
CXX_STANDARD_INCLUDES = $(addprefix -isystem ,$(CXX_STANDARD_INCLUDE_DIRS))
CXX_INCLUDES = -I$(LIBBASE_DIRECTORY) \
               -I$(SOC_DIRECTORY)/software/include \
               -I$(SOC_DIRECTORY)/software \
               -I$(BUILDINC_DIRECTORY) \
               -I$(BUILDINC_DIRECTORY)/../libc \
               -I$(CPU_DIRECTORY) \
               $(CXX_STANDARD_INCLUDES) \
               -isystem $(PICOLIBC_DIRECTORY)/libc/include
BASEFLAGS = $(DEPFLAGS) -Os $(CPUFLAGS) -g3 -no-pie -fomit-frame-pointer -Wall \
            -fno-builtin -fno-stack-protector -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 \
            -ffunction-sections -fdata-sections
COMMONFLAGS = $(BASEFLAGS) $(INCLUDES)
CXXCOMMONFLAGS = $(BASEFLAGS) $(CXX_INCLUDES)
ifeq ($(LTO), 1)
COMMONFLAGS += -flto
CXXCOMMONFLAGS += -flto
endif
ifneq ($(CPUFAMILY), arm)
COMMONFLAGS += -fexceptions
CXXCOMMONFLAGS += -fexceptions
endif
CFLAGS = $(COMMONFLAGS) -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes
ifneq ($(strip $(CXX_STANDARD_INCLUDES)),)
CXXFLAGS = -nostdinc++ $(CXXCOMMONFLAGS) -std=c++11 -I$(SOC_DIRECTORY)/software/include/basec++ -fno-rtti -ffreestanding
else
CXXFLAGS = $(COMMONFLAGS) -std=c++11 -I$(SOC_DIRECTORY)/software/include/basec++ -fno-rtti -ffreestanding
endif
LDFLAGS = -nostdlib -nodefaultlibs -Wl,--no-dynamic-linker -Wl,--build-id=none $(CFLAGS) -L$(BUILDINC_DIRECTORY)

define compilexx
$(CX) -c $(CXXFLAGS) $(1) $< -o $@
endef

define compile
$(CC) -c $(CFLAGS) $(1) $< -o $@
endef

define assemble
$(CC) -c $(CFLAGS) -o $@ $<
endef