commit eefdd367c91d7a378cf452dda92455400b79d1a7
Author: Brian Swetland <swetland@frotz.net>
Date: Fri, 22 Apr 2022 11:08:02 -0700
a simple build system
Diffstat:
| A | .gitignore | | | 1 | + |
| A | Makefile | | | 50 | ++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | make/app.mk | | | 68 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
3 files changed, 119 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+out/
diff --git a/Makefile b/Makefile
@@ -0,0 +1,50 @@
+## Copyright 2022, Brian Swetland <swetland@frotz.net>
+## Licensed under the Apache License, Version 2.0
+
+all:: build-all
+
+-include local.mk
+
+V := @
+
+XTOOLCHAIN ?= /toolchain/riscv32-11.2.0/bin/riscv32-elf-
+QEMU ?= /work/app/qemu/bin/qemu-system-riscv32
+
+QFLAGS := -machine virt -bios none -nographic
+QFLAGS.GDB := $(QFLAGS) -gdb tcp::7777 -S
+
+ifeq ($(wildcard $(XTOOLCHAIN)gcc),)
+$(warning Cannot find toolchain $(XTOOLCHAIN))
+$(error Please set XTOOLCHAIN in local.mk)
+endif
+
+ifeq ($(wildcard $(QEMU)),)
+$(warning Cannot find qemu-system-riscv32)
+$(error Please set QEMU in local.mk)
+endif
+
+XGCC := $(XTOOLCHAIN)gcc
+XOBJDUMP := $(XTOOLCHAIN)objdump
+XOBJCOPY := $(XTOOLCHAIN)objcopy
+
+ARCHFLAGS := -march=rv32im -mabi=ilp32 -mcmodel=medany
+ARCHFLAGS += -static -nostdlib -nostartfiles -ffreestanding
+ARCHFLAGS += -ffunction-sections -fdata-sections
+ARCHFLAGS += -fno-builtin -fno-strict-aliasing
+
+LDSCRIPT := hw/simple.ld
+
+BUILD := out
+
+CFLAGS := -g -Wall -Ilibc/inc -Ihw/inc
+
+ALL :=
+
+LIBC_SRC := libc/src/printf.c $(wildcard libc/src/string/*.c)
+
+include $(wildcard project/*.mk)
+
+build-all: $(ALL)
+
+clean::
+ rm -rf $(BUILD)
diff --git a/make/app.mk b/make/app.mk
@@ -0,0 +1,68 @@
+## Copyright 2022, Brian Swetland <swetland@frotz.net>
+## Licensed under the Apache License, Version 2.0
+
+APPDIR := $(BUILD)/$(APP)
+APPELF := $(BUILD)/$(APP).elf
+APPLST := $(BUILD)/$(APP).lst
+
+ALL += $(APPELF) $(APPLST)
+
+# Generate objects from sources.
+APPOBJ := $(patsubst %.c,$(APPDIR)/%.o,$(SRC))
+APPOBJ := $(patsubst %.S,$(APPDIR)/%.o,$(APPOBJ))
+
+# Assemble compile and link flags.
+APPCFLAGS := $(ARCHFLAGS) $(CFLAGS) $(patsubst %,-I%,$(APPINC))
+APPLDFLAGS := $(ARCHFLAGS) -Wl,--gc-sections
+
+$(shell mkdir -p $(APPDIR))
+
+# Track flags in a build.opts file so we can depend on it.
+# Write the file only if it does not already contain the
+# same options as currently defined.
+$(APPOBJ): $(APPDIR)/build.opts
+$(APPELF): $(APPDIR)/build.opts
+
+OPTS.A := $(APPCFLAGS) $(APPLDFLAGS)
+OPTS.B := $(file <$(APPDIR)/build.opts)
+
+ifneq ($(OPTS.A),$(OPTS.B))
+$(file >$(APPDIR)/build.opts,$(OPTS.A))
+endif
+
+$(APPELF): _OBJ := $(APPOBJ)
+$(APPELF): _LDFLAGS := $(APPLDFLAGS) -T $(LDSCRIPT)
+$(APPLIB): _LIB := -lgcc
+$(APPELF): $(APPOBJ) $(LDSCRIPT) $(APPDIR)/build.opts
+ @$(info linking $@)
+ $(V)$(XGCC) $(_LDFLAGS) -o $@ $(_OBJ) $(_LIB)
+
+$(APPLST): $(APPELF)
+ $(V)$(XOBJDUMP) -D $< > $@
+
+$(APPDIR)/%.o: _CFLAGS := $(APPCFLAGS)
+
+$(APPDIR)/%.o: %.c
+ @mkdir -p $(dir $@)
+ @$(info compiling $<)
+ $(V)$(XGCC) -c -o $@ $< $(_CFLAGS) -MD -MP -MT $@ -MF $(@:%o=%d)
+
+$(APPDIR)/%.o: %.S
+ @mkdir -p $(dir $@)
+ @$(info compiling $<)
+ $(V)$(XGCC) -c -o $@ $< $(_CFLAGS) -MD -MP -MT $@ -MF $(@:%o=%d)
+
+-include $(patsubst %.o,%.d,$(APPOBJ))
+
+run.$(APP):: _BIN := $(APPELF)
+run.$(APP):: $(APPELF)
+ $(QEMU) $(QFLAGS) -kernel $(_BIN)
+
+debug.$(APP):: _BIN := $(APPELF)
+debug.$(APP):: $(APPELF)
+ $(QEMU) $(QFLAGS.GDB) -kernel $(_BIN)
+
+APP :=
+INC :=
+SRC :=
+
