Makefile: add ADD_IMAGE helper

- libam-riscv32-nemu is working.
- libam on platforms other than riscv32-nemu has not been worked on yet.
- klib has not been worked on yet.

Makefile

@@ -1,4 +1,5 @@
 # Makefile for AbstractMachine Kernels and Libraries
+include scripts/helpers/rules.mk
 
 ### *Get a more readable version of this Makefile* by `make html` (requires python-markdown)
 html:
@@ -17,9 +18,6 @@ endif
 ### Override checks when `make clean/clean-all/html`
 ifeq ($(findstring $(MAKECMDGOALS),clean|clean-all|html),)
 
-### Print build info message
-$(info # Building $(NAME)-$(MAKECMDGOALS) [$(ARCH)])
-
 ### Check: environment variable `$AM_HOME` looks sane
 ifeq ($(wildcard $(AM_HOME)/am/include/am.h),)
   $(error $$AM_HOME must be an AbstractMachine repo)
@@ -36,33 +34,18 @@ ARCH_SPLIT = $(subst -, ,$(ARCH))
 ISA        = $(word 1,$(ARCH_SPLIT))
 PLATFORM   = $(word 2,$(ARCH_SPLIT))
 
-### Check if there is something to build
-ifeq ($(flavor SRCS), undefined)
-  $(error Nothing to build)
-endif
-
 ### Checks end here
 endif
 
 ## 2. General Compilation Targets
 
 ### Create the destination directory (`build/$ARCH`)
-WORK_DIR  = $(shell pwd)
-DST_DIR   = $(WORK_DIR)/build/$(ARCH)
-$(shell mkdir -p $(DST_DIR))
-
-### Compilation targets (a binary image or archive)
-IMAGE_REL = build/$(NAME)-$(ARCH)
-IMAGE     = $(abspath $(IMAGE_REL))
-ARCHIVE   = $(WORK_DIR)/build/$(NAME)-$(ARCH).a
-
-### Collect the files to be linked: object files (`.o`) and libraries (`.a`)
-OBJS      = $(addprefix $(DST_DIR)/, $(addsuffix .o, $(basename $(SRCS))))
-LIBS     := $(sort $(LIBS) am klib) # lazy evaluation ("=") causes infinite recursions
-LINKAGE   = $(OBJS) \
-  $(addsuffix -$(ARCH).a, $(join \
-    $(addsuffix /build/, $(addprefix $(AM_HOME)/, $(LIBS))), \
-    $(LIBS) ))
+WORK_DIR  ?= $(shell pwd)
+DST_DIR   ?= $(WORK_DIR)/build/$(ARCH)
+LIB_BUILDDIR ?= $(DST_DIR)/lib
+INSTALLDIR ?= $(WORK_DIR)/build/install/$(ARCH)
+LIB_INSTALLDIR ?= $(INSTALLDIR)/lib
+INC_INSTALLDIR ?= $(INSTALLDIR)/include
 
 ## 3. General Compilation Flags
 
@@ -76,27 +59,12 @@ OBJDUMP   ?= $(CROSS_COMPILE)objdump
 OBJCOPY   ?= $(CROSS_COMPILE)objcopy
 READELF   ?= $(CROSS_COMPILE)readelf
 
-### Compilation flags
-INC_PATH += $(WORK_DIR)/include $(addsuffix /include/, $(addprefix $(AM_HOME)/, $(LIBS)))
-INCFLAGS += $(addprefix -I, $(INC_PATH))
-
-ARCH_H := arch/$(ARCH).h
-CFLAGS   += -lm -g -O3 -MMD -Wall $(INCFLAGS) \
-            -D__ISA__=\"$(ISA)\" -D__ISA_$(shell echo $(ISA) | tr a-z A-Z)__ \
-            -D__ARCH__=$(ARCH) -D__ARCH_$(shell echo $(ARCH) | tr a-z A-Z | tr - _) \
-            -D__PLATFORM__=$(PLATFORM) -D__PLATFORM_$(shell echo $(PLATFORM) | tr a-z A-Z | tr - _) \
-            -DARCH_H=\"$(ARCH_H)\" \
-            -fno-asynchronous-unwind-tables -fno-builtin -fno-stack-protector \
-            -Wno-main -U_FORTIFY_SOURCE -fvisibility=hidden
 CXXFLAGS +=  $(CFLAGS) -ffreestanding -fno-rtti -fno-exceptions
-ASFLAGS  += $(INCFLAGS)
 LDFLAGS  += -z noexecstack
+INTERFACE_LDFLAGS  += -z noexecstack
 
 ## 4. Arch-Specific Configurations
 
-### Paste in arch-specific configurations (e.g., from `scripts/x86_64-qemu.mk`)
--include $(AM_HOME)/scripts/$(ARCH).mk
-
 ### Fall back to native gcc/binutils if there is no cross compiler
 ifeq ($(wildcard $(shell which $(CC))),)
   $(info #  $(CC) not found; fall back to default gcc and binutils)
@@ -105,43 +73,47 @@ endif
 
 ## 5. Compilation Rules
 
-### Rule (compile): a single `.c` -> `.o` (gcc)
-$(DST_DIR)/%.o: %.c
-	@mkdir -p $(dir $@) && echo + CC $<
-	@$(CC) -std=gnu11 $(CFLAGS) -c -o $@ $(realpath $<)
+BUILDDIR := $(DST_DIR)
+### Build libam
 
-### Rule (compile): a single `.cc` -> `.o` (g++)
-$(DST_DIR)/%.o: %.cc
-	@mkdir -p $(dir $@) && echo + CXX $<
-	@$(CXX) -std=c++17 $(CXXFLAGS) -c -o $@ $(realpath $<)
+#### Include archetecture specific build flags
+include $(AM_HOME)/scripts/$(ARCH).mk
 
-### Rule (compile): a single `.cpp` -> `.o` (g++)
-$(DST_DIR)/%.o: %.cpp
-	@mkdir -p $(dir $@) && echo + CXX $<
-	@$(CXX) -std=c++17 $(CXXFLAGS) -c -o $@ $(realpath $<)
+#### Generating build rules with ADD_LIBRARY call. Target specific build flags can be tuned via changing prefixed variables (AM_ here)
+AM_INCPATH += $(AM_HOME)/am/include $(AM_HOME)/am/src $(AM_HOME)/klib/include
+AM_CFLAGS  += -lm -g -O3 -MMD -Wall $(addprefix -I, $(AM_INCPATH)) \
+              -D__ISA__=\"$(ISA)\" -D__ISA_$(shell echo $(ISA) | tr a-z A-Z)__ \
+              -D__ARCH__=$(ARCH) -D__ARCH_$(shell echo $(ARCH) | tr a-z A-Z | tr - _) \
+              -D__PLATFORM__=$(PLATFORM) -D__PLATFORM_$(shell echo $(PLATFORM) | tr a-z A-Z | tr - _) \
+              -DARCH_H=\"$(ARCH_H)\"
+AM_INTERFACE_INCPATH += $(AM_HOME)/am/include $(AM_HOME)/klib/include
+AM_INTERFACE_CFLAGS += $(addprefix -I, $(AM_INTERFACE_INCPATH)) \
+                       -lm -DARCH_H=\"$(ARCH_H)\" -fno-asynchronous-unwind-tables -fno-builtin -fno-stack-protector \
+                       -Wno-main -U_FORTIFY_SOURCE -fvisibility=hidden
 
-### Rule (compile): a single `.S` -> `.o` (gcc, which preprocesses and calls as)
-$(DST_DIR)/%.o: %.S
-	@mkdir -p $(dir $@) && echo + AS $<
-	@$(AS) $(ASFLAGS) -c -o $@ $(realpath $<)
+$(eval $(call ADD_LIBRARY,$(LIB_BUILDDIR)/libam-$(ARCH).a,AM_))
 
-### Rule (recursive make): build a dependent library (am, klib, ...)
-$(LIBS): %:
-	@$(MAKE) -s -C $(AM_HOME)/$* archive
+### Build klib
+
+KLIB_SRCS := $(shell find klib/src/ -name "*.c")
+
+KLIB_INCPATH += $(AM_HOME)/am/include $(AM_HOME)/klib/include
+KLIB_CFLAGS += -MMD -Wall $(addprefix -I, $(KLIB_INCPATH)) \
+               -DARCH_H=\"$(ARCH_H)\"
+KLIB_INTERFACE_INCPATH += $(AM_HOME)/am/include $(AM_HOME)/klib/include
+KLIB_INTERFACE_CFLAGS += -DARCH_H=\"$(ARCH_H)\" $(addprefix -I, $(KLIB_INTERFACE_INCPATH))
+
+$(eval $(call ADD_LIBRARY,$(LIB_BUILDDIR)/libklib-$(ARCH).a,KLIB_))
+
+LIBS := am klib
+libs: $(addsuffix -$(ARCH).a, $(addprefix $(LIB_BUILDDIR)/lib, $(ALL)))
+$(LIBS): %: $(addsuffix -$(ARCH).a, $(addprefix $(LIB_BUILDDIR)/lib, %))
 
 ### Rule (link): objects (`*.o`) and libraries (`*.a`) -> `IMAGE.elf`, the final ELF binary to be packed into image (ld)
 $(IMAGE).elf: $(OBJS) $(LIBS)
 	@echo + LD "->" $(IMAGE_REL).elf
 	@$(LD) $(LDFLAGS) -o $(IMAGE).elf --start-group $(LINKAGE) --end-group
 
-### Rule (archive): objects (`*.o`) -> `ARCHIVE.a` (ar)
-$(ARCHIVE): $(OBJS)
-	@echo + AR "->" $(shell realpath $@ --relative-to .)
-	@$(AR) rcs $(ARCHIVE) $(OBJS)
-
-### Rule (`#include` dependencies): paste in `.d` files generated by gcc on `-MMD`
--include $(addprefix $(DST_DIR)/, $(addsuffix .d, $(basename $(SRCS))))
-
 ## 6. Miscellaneous
 
 ### Build order control
@@ -149,7 +121,47 @@ image: image-dep
 archive: $(ARCHIVE)
 image-dep: $(OBJS) $(LIBS)
 	@echo \# Creating image [$(ARCH)]
-.PHONY: image image-dep archive run $(LIBS)
+.PHONY: image image-dep archive run libs $(LIBS) install
+
+### Install rules
+
+INTERFACE_INCPATH += $(sort $(KLIB_INTERFACE_INCPATH) $(AM_INTERFACE_INCPATH))
+INTERFACE_CFLAGS += $(sort $(KLIB_INTERFACE_CFLAGS) $(AM_INTERFACE_CFLAGS))
+INTERFACE_LDFLAGS += $(sort $(KLIB_LDFLAGS) $(AM_LDFLAGS))
+
+EXPORT_FLAGS_FILE := $(LIB_INSTALLDIR)/make/flags-$(ARCH).mk
+EXPORT_FLAGS_TEMPLATE := $(file < $(AM_HOME)/scripts/templates/flags.tmpl)
+HELPERS := $(wildcard find scripts/helpers/*.mk)
+EXPORT_HELPERS := $(HELPERS:scripts/helpers/%=$(LIB_INSTALLDIR)/make/%)
+
+test:
+	@echo $(EXPORT_HELPERS)
+	@echo $(LIB_INSTALLDIR)
+
+EXPORTS := $(EXPORT_FLAGS_FILE) $(EXPORT_HELPERS)
+
+$(EXPORT_HELPERS): $(LIB_INSTALLDIR)/make/%: scripts/helpers/%
+	@echo + INSTALL $(patsubst $(INSTALLDIR)/%,%,$@)
+	@install -dm755 $(dir $@)
+	@install -Dm644 $< $(dir $@)
+
+export INTERFACE_CFLAGS INTERFACE_INCPATH INTERFACE_LDFLAGS
+$(EXPORT_FLAGS_FILE):
+	@echo + INSTALL $(patsubst $(INSTALLDIR)/%,%,$@)
+	@install -Dm644 <(printf $(EXPORT_FLAGS_TEMPLATE)) $(EXPORT_FLAGS_FILE)
+
+install-libs: $(LIBS)
+	@echo + INSTALL LIBS: $(LIBS) 
+	@install -dm755 $(LIB_INSTALLDIR)
+	@install -Dm644 $(addsuffix -$(ARCH).a, $(addprefix $(LIB_BUILDDIR)/lib, $(LIBS))) $(LIB_INSTALLDIR)
+
+install-headers: HEADERS := $(shell find $(INTERFACE_INCPATH) -name '*.h')
+install-headers:
+	@echo + INSTALL HEADERS: $(patsubst $(AM_HOME)/%,%,$(HEADERS)) 
+	@install -dm755 $(INC_INSTALLDIR)
+	@install -Dm644 $(HEADERS) $(INC_INSTALLDIR)
+
+install: $(EXPORTS) install-libs install-headers
 
 ### Clean a single project (remove `build/`)
 clean:

am/src/platform/nemu/ioe/ioe.c

@@ -18,42 +18,44 @@ void __am_disk_config(AM_DISK_CONFIG_T *cfg);
 void __am_disk_status(AM_DISK_STATUS_T *stat);
 void __am_disk_blkio(AM_DISK_BLKIO_T *io);
 
-static void __am_timer_config(AM_TIMER_CONFIG_T *cfg) { cfg->present = true; cfg->has_rtc = true; }
-static void __am_input_config(AM_INPUT_CONFIG_T *cfg) { cfg->present = true;  }
-static void __am_uart_config(AM_UART_CONFIG_T *cfg)   { cfg->present = false; }
-static void __am_net_config (AM_NET_CONFIG_T *cfg)    { cfg->present = false; }
+static void __am_timer_config(AM_TIMER_CONFIG_T *cfg) {
+  cfg->present = true;
+  cfg->has_rtc = true;
+}
+static void __am_input_config(AM_INPUT_CONFIG_T *cfg) { cfg->present = true; }
+static void __am_uart_config(AM_UART_CONFIG_T *cfg) { cfg->present = false; }
+static void __am_net_config(AM_NET_CONFIG_T *cfg) { cfg->present = false; }
 
 typedef void (*handler_t)(void *buf);
 static void *lut[128] = {
-  [AM_TIMER_CONFIG] = __am_timer_config,
-  [AM_TIMER_RTC   ] = __am_timer_rtc,
-  [AM_TIMER_UPTIME] = __am_timer_uptime,
-  [AM_INPUT_CONFIG] = __am_input_config,
-  [AM_INPUT_KEYBRD] = __am_input_keybrd,
-  [AM_GPU_CONFIG  ] = __am_gpu_config,
-  [AM_GPU_FBDRAW  ] = __am_gpu_fbdraw,
-  [AM_GPU_STATUS  ] = __am_gpu_status,
-  [AM_UART_CONFIG ] = __am_uart_config,
-  [AM_AUDIO_CONFIG] = __am_audio_config,
-  [AM_AUDIO_CTRL  ] = __am_audio_ctrl,
-  [AM_AUDIO_STATUS] = __am_audio_status,
-  [AM_AUDIO_PLAY  ] = __am_audio_play,
-  [AM_DISK_CONFIG ] = __am_disk_config,
-  [AM_DISK_STATUS ] = __am_disk_status,
-  [AM_DISK_BLKIO  ] = __am_disk_blkio,
-  [AM_NET_CONFIG  ] = __am_net_config,
+    [AM_TIMER_CONFIG] = __am_timer_config,
+    [AM_TIMER_RTC] = __am_timer_rtc,
+    [AM_TIMER_UPTIME] = __am_timer_uptime,
+    [AM_INPUT_CONFIG] = __am_input_config,
+    [AM_INPUT_KEYBRD] = __am_input_keybrd,
+    [AM_GPU_CONFIG] = __am_gpu_config,
+    [AM_GPU_FBDRAW] = __am_gpu_fbdraw,
+    [AM_GPU_STATUS] = __am_gpu_status,
+    [AM_UART_CONFIG] = __am_uart_config,
+    [AM_AUDIO_CONFIG] = __am_audio_config,
+    [AM_AUDIO_CTRL] = __am_audio_ctrl,
+    [AM_AUDIO_STATUS] = __am_audio_status,
+    [AM_AUDIO_PLAY] = __am_audio_play,
+    [AM_DISK_CONFIG] = __am_disk_config,
+    [AM_DISK_STATUS] = __am_disk_status,
+    [AM_DISK_BLKIO] = __am_disk_blkio,
+    [AM_NET_CONFIG] = __am_net_config,
 };
 
 static void fail(void *buf) { panic("access nonexist register"); }
 
 bool ioe_init() {
   for (int i = 0; i < LENGTH(lut); i++)
-    if (!lut[i]) lut[i] = fail;
-  __am_gpu_init();
+    if (!lut[i])
+      lut[i] = fail;
   __am_timer_init();
-  __am_audio_init();
   return true;
 }
 
-void ioe_read (int reg, void *buf) { ((handler_t)lut[reg])(buf); }
+void ioe_read(int reg, void *buf) { ((handler_t)lut[reg])(buf); }
 void ioe_write(int reg, void *buf) { ((handler_t)lut[reg])(buf); }

scripts/helpers/rules.mk

@@ -0,0 +1,64 @@
+
+# Usage:
+# $(1): Target prefix
+#
+# Generate build rules for files in variable <PREFIX>_SRCS. Use <PREFIX>_CFLAGS,
+# <PREFIX>_CXXFLAGS, <PREFIX>_ASFLAGS to control build flags.
+# Object files will be put into $BUILDDIR
+# E.g: 
+# $(eval $(call COMPILE_RULES,AM_))
+define COMPILE_RULES
+$(1)OBJS := $$(addprefix $$(BUILDDIR)/, $$(addsuffix .o, $$($(1)SRCS)))
+### Rule (compile): a single `.c` -> `.c.o` (gcc)
+$$(filter %.c.o, $$($(1)OBJS)): $$(BUILDDIR)/%.c.o: %.c
+	@mkdir -p $$(dir $$@) && echo + CC $$<
+	@$$(CC) $$($(1)CFLAGS) -c -o $$@ $$(realpath $$<)
+
+### Rule (compile): a single `.cc` -> `.cc.o` (g++)
+$$(filter %.cc.o, $$($(1)OBJS)): $$(BUILDDIR)/%.cc.o: %.cc
+	@mkdir -p $$(dir $$@) && echo + CXX $$<
+	@$$(CXX) $$($(1)CXXFLAGS) -c -o $$@ $$(realpath $$<)
+
+### Rule (compile): a single `.cpp` -> `.cpp.o` (g++)
+$$(filter %.cpp.o, $$($(1)OBJS)): $$(BUILDDIR)/%.cpp.o: %.cpp
+	@mkdir -p $$(dir $$@) && echo + CXX $$<
+	@$$(CXX) $$($(1)CXXFLAGS) -c -o $$@ $$(realpath $$<)
+
+### Rule (compile): a single `.S` -> `.S.o` (gcc, which preprocesses and calls as)
+$$(filter %.S.o, $$($(1)OBJS)): $$(BUILDDIR)/%.S.o: %.S
+	@mkdir -p $$(dir $$@) && echo + AS $$<
+	@$$(AS) $$($(1)ASFLAGS) -c -o $$@ $$(realpath $$<)
+
+### Rule (`#include` dependencies): paste in `.d` files generated by gcc on `-MMD`
+-include $$(addprefix $$(BUILDDIR)/, $$(addsuffix .d, $$(filter %.c %.cc, $$($(1)SRCS))))
+endef
+
+# Usage:
+# $(1): Library build path
+# $(2): Library variable prefix
+# E.g: 
+# $(eval $(call ADD_LIBRARY,am-riscv,AM_))
+define ADD_LIBRARY
+$(eval $(call COMPILE_RULES,$(2)))
+$(1): $$($(2)OBJS) 
+	@mkdir -p $$(dir $$@)
+	@echo + AR "->" $$(patsubst $$(CURDIR)/%,%,$(1))
+	@$$(AR) rcs $$@ $$($(2)OBJS)
+endef
+
+# Usage:
+# $(1): Image build path
+# $(2): Image variable prefix
+# E.g: 
+# $(eval $(call ADD_IMAGE,dummy,DUMMY_))
+define ADD_IMAGE
+$(eval $(call COMPILE_RULES,$(2)))
+$(1).elf: $$($(2)OBJS) 
+	@mkdir -p $$(dir $$@)
+	@echo + LD "->" $$(patsubst $$(CURDIR)/%,%,$(1).elf)
+	@$$(LD) $$($(2)_LDFLAGS) -o $$@ --start-group $$($(2)OBJS) --end-group
+$(1).bin: $(1).elf
+	@echo + OBJCOPY "->" $$(patsubst $$(CURDIR)/%,%,$(1))
+	@$$(OBJCOPY) -S --set-section-flags .bss=alloc,contents -O binary $(1).elf $(1).bin
+endef
+

scripts/isa/riscv.mk

@@ -1,8 +1,7 @@
 CROSS_COMPILE := riscv64-linux-gnu-
-COMMON_CFLAGS := -fno-pic -march=rv64g -mcmodel=medany  -mstrict-align
-CFLAGS        += $(COMMON_CFLAGS) -static
-ASFLAGS       += $(COMMON_CFLAGS) -O0
-LDFLAGS       += -melf64lriscv -O2
+AM_CFLAGS        += -static -fno-pic -march=rv64g -mcmodel=medany  -mstrict-align
+AM_ASFLAGS       += -static -fno-pic -march=rv32g_zicsr -mcmodel=medany -O0
+AM_LDFLAGS       += -melf64lriscv -O2
 
 # overwrite ARCH_H defined in $(AM_HOME)/Makefile
 ARCH_H := arch/riscv.h

scripts/platform/nemu.mk

@@ -1,21 +1,19 @@
-AM_SRCS := platform/nemu/trm.c \
-           platform/nemu/ioe/ioe.c \
-           platform/nemu/ioe/timer.c \
-           platform/nemu/ioe/input.c \
-           platform/nemu/ioe/gpu.c \
-           platform/nemu/ioe/audio.c \
-           platform/nemu/ioe/disk.c \
-           platform/nemu/mpe.c
+AM_SRCS := am/src/platform/nemu/trm.c \
+           am/src/platform/nemu/ioe/ioe.c \
+           am/src/platform/nemu/ioe/timer.c \
+           am/src/platform/nemu/ioe/input.c \
+           am/src/platform/nemu/ioe/gpu.c \
+           am/src/platform/nemu/ioe/audio.c \
+           am/src/platform/nemu/ioe/disk.c \
+           am/src/platform/nemu/mpe.c
 
-CFLAGS    += -fdata-sections -ffunction-sections
-LDFLAGS   += -T $(AM_HOME)/scripts/linker.ld \
+AM_CFLAGS    += -fdata-sections -ffunction-sections
+AM_LDFLAGS   += -T $(AM_HOME)/scripts/linker.ld \
              --defsym=_pmem_start=0x80000000 --defsym=_entry_offset=0x0
-LDFLAGS   += --gc-sections -e _start
-NEMUFLAGS += -b 
-#-l $(shell dirname $(IMAGE).elf)/nemu-log.txt 
+AM_LDFLAGS   += --gc-sections -e _start
 
-CFLAGS += -DMAINARGS=\"$(mainargs)\"
-CFLAGS += -I$(AM_HOME)/am/src/platform/nemu/include
+AM_CFLAGS += -DMAINARGS=\"$(mainargs)\"
+AM_INCPATH += $(AM_HOME)/am/src/platform/nemu/include
 .PHONY: $(AM_HOME)/am/src/platform/nemu/trm.c
 
 image: $(IMAGE).elf
@@ -23,6 +21,9 @@ image: $(IMAGE).elf
 	@echo + OBJCOPY "->" $(IMAGE_REL).bin
 	@$(OBJCOPY) -S --set-section-flags .bss=alloc,contents -O binary $(IMAGE).elf $(IMAGE).bin
 
+NEMUFLAGS += -b 
+#-l $(shell dirname $(IMAGE).elf)/nemu-log.txt 
+
 run: image
 	$(MAKE) -C $(NEMU_HOME) ISA=$(ISA) run ARGS="$(NEMUFLAGS)" IMG=$(IMAGE).bin
 

scripts/riscv32-nemu.mk

@@ -1,10 +1,9 @@
 include $(AM_HOME)/scripts/isa/riscv.mk
 include $(AM_HOME)/scripts/platform/nemu.mk
-CFLAGS  += -DISA_H=\"riscv/riscv.h\"
-COMMON_CFLAGS += -march=rv32im_zicsr -mabi=ilp32  # overwrite
-LDFLAGS       +=  -melf32lriscv                   # overwrite
+AM_CFLAGS  += -DISA_H=\"riscv/riscv.h\" -march=rv32im_zicsr -mabi=ilp32  # overwrite
+AM_LDFLAGS += -melf32lriscv                   # overwrite
 
-AM_SRCS += riscv/nemu/start.S \
-           riscv/nemu/cte.c \
-           riscv/nemu/trap.S \
-           riscv/nemu/vme.c
+AM_SRCS += am/src/riscv/nemu/start.S \
+           am/src/riscv/nemu/cte.c \
+           am/src/riscv/nemu/trap.S \
+           am/src/riscv/nemu/vme.c

scripts/templates/flags.tmpl

@@ -0,0 +1,4 @@
+"AM_CFLAGS += %s \n\
+AM_LDFLAGS += %s" \
+"$INTERFACE_CFLAGS" \
+"$INTERFACE_LDFLAGS"