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##
# By default everything is silent. If you want to change this behavior, simply
# assign V=1 when calling make.
V =
ifeq ($(strip $(V)),)
E = @echo
Q = @
else
E = @\#
Q =
endif
##
# Compile options. You can use CROSS_COMPILE just like on the Linux Kernel. You
# can also determine the ISA to be used, which defaults to my VisionFive2 board.
# I did not go too much into the rabbit hole of platform-specific flags because
# everything is in assembly anyways and everything is statically linked. Hence
# no `-mcpu`, no `-mtune`, no funny business.
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
ISA ?= rv64imafdc_zicntr_zicsr_zifencei_zihpm_zca_zcd_zba_zbb
WARNINGS = -Werror -Wpedantic -Wall -Wextra -Wcast-align -Wcast-qual -Winit-self \
-Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-conversion \
-Wswitch-default -Wundef -Wunreachable-code -Wmissing-noreturn
CCFLAGS = $(WARNINGS) -march=$(ISA) -static
LDFLAGS =
# You can pass an optional `DEBUG` variable to manipulate the build type.
DEBUG =
ifeq ($(strip $(DEBUG)),)
CCFLAGS += -O3
else
CCFLAGS += -g
endif
##
# Paths.
SRC = $(wildcard *.c)
EXES = $(SRC:.c=)
##
# Targets
.PHONY: all
all: clean $(EXES)
.PHONY: build
build: $(EXES)
.c:
$(E) " CC " $(*F)
$(Q) $(CC) $(CCFLAGS) $< -o $@
.PHONY: clean
clean:
$(Q) rm -f $(EXES)
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