1# Copyright 2023 Nordic Semiconductor ASA
2# SPDX-License-Identifier: Apache-2.0
3
4# Native Simulator (NSI) Makefile.
5# It builds the simulator runner itself, and produces the final
6# Linux executable by linking it to the the embedded cpu library
7
8# By default all the build output is placed under the _build folder, but the user can override it
9# setting the NSI_BUILD_PATH
10#
11# The caller can provide an optional configuration file and point to it with NSI_CONFIG_FILE
12# See "Configurable/user overridible variables" below.
13#
14# By default only the core of the runner will be built, but the caller can set NSI_NATIVE
15# to also build the components in native/src/
16
17NSI_CONFIG_FILE?=nsi_config
18-include ${NSI_CONFIG_FILE}
19#If the file does not exist, we don't use it as a build dependency
20NSI_CONFIG_FILE:=$(wildcard ${NSI_CONFIG_FILE})
21
22# Configurable/user overridible variables:
23#  Path to the native_simulator (this folder):
24NSI_PATH?=./
25#  Folder where the build output will be placed
26NSI_BUILD_PATH?=$(abspath _build/)
27EXE_NAME?=native_simulator.exe
28#  Final executable path/file_name which will be produced
29NSI_EXE?=${NSI_BUILD_PATH}/${EXE_NAME}
30# Number of embedded CPUs/MCUs
31NSI_N_CPUS?=1
32# Path to all CPUs embedded SW which will be linked with the final executable
33NSI_EMBEDDED_CPU_SW?=
34#  Host architecture configuration switch
35NSI_ARCH?=-m32
36#  Coverage switch (GCOV coverage is enabled by default)
37NSI_COVERAGE?=--coverage
38NSI_LOCALIZE_OPTIONS?=
39NSI_BUILD_OPTIONS?=${NSI_ARCH} ${NSI_COVERAGE}
40NSI_LINK_OPTIONS?=${NSI_ARCH} ${NSI_COVERAGE}
41#  Extra source files to be built in the runner context
42NSI_EXTRA_SRCS?=
43#  Extra include directories to be used while building in the runner context
44NSI_EXTRA_INCLUDES?=
45#  Extra libraries to be linked to the final executable
46NSI_EXTRA_LIBS?=
47
48SHELL?=bash
49#  Compiler
50NSI_CC?=gcc
51#  Archive program (it is unlikely you'll need to change this)
52NSI_AR?=ar
53#  Objcopy program (it is unlikely you'll need to change this)
54NSI_OBJCOPY?=objcopy
55
56#  Build debug switch (by default enabled)
57NSI_DEBUG?=-g
58#  Build optimization level (by default disabled to ease debugging)
59NSI_OPT?=-O0
60#  Warnings switches (for the runner itself)
61NSI_WARNINGS?=-Wall -Wpedantic
62#  Preprocessor flags
63NSI_CPPFLAGS?=-D_POSIX_C_SOURCE=200809 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED
64
65NO_PIE_CO:=-fno-pie -fno-pic
66DEPENDFLAGS:=-MMD -MP
67CFLAGS:=${NSI_DEBUG} ${NSI_WARNINGS} ${NSI_OPT} ${NO_PIE_CO} -DNSI_N_CPUS=${NSI_N_CPUS} \
68  -ffunction-sections -fdata-sections ${DEPENDFLAGS} -std=c11 ${NSI_BUILD_OPTIONS}
69FINALLINK_FLAGS:=${NO_PIE_CO} -no-pie  ${NSI_WARNINGS} \
70  -Wl,--gc-sections -ldl -pthread \
71  ${NSI_LINK_OPTIONS} -lm
72
73no_default:
74	@echo "There is no default rule, please specify what you want to build,\
75 or run make help for more info"
76
77RUNNER_LIB:=runner.a
78
79SRCS:=$(shell ls ${NSI_PATH}common/src/*.c)
80ifdef NSI_NATIVE
81  SRCS+=$(shell ls ${NSI_PATH}native/src/*.c)
82endif
83
84INCLUDES:=-I${NSI_PATH}common/src/include/ \
85 -I${NSI_PATH}common/src \
86 ${NSI_EXTRA_INCLUDES}
87
88ifdef NSI_NATIVE
89  INCLUDES+=-I${NSI_PATH}native/src/include/
90endif
91
92EXTRA_OBJS:=$(abspath $(addprefix $(NSI_BUILD_PATH)/,$(sort ${NSI_EXTRA_SRCS:%.c=%.o})))
93OBJS:=$(abspath $(addprefix $(NSI_BUILD_PATH)/,${SRCS:${NSI_PATH}%.c=%.o})) ${EXTRA_OBJS}
94
95DEPENDFILES:=$(addsuffix .d,$(basename ${OBJS}))
96
97-include ${DEPENDFILES}
98
99LOCALIZED_EMBSW:=$(abspath $(addprefix $(NSI_BUILD_PATH)/,$(addsuffix .loc_cpusw.o,${NSI_EMBEDDED_CPU_SW})))
100
101${NSI_BUILD_PATH}:
102	@if [ ! -d ${NSI_BUILD_PATH} ]; then mkdir -p ${NSI_BUILD_PATH}; fi
103
104#Extra sources build:
105${NSI_BUILD_PATH}/%.o: /%.c ${NSI_PATH}Makefile ${NSI_CONFIG_FILE}
106	@if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
107	${NSI_CC} ${NSI_CPPFLAGS} ${INCLUDES} ${CFLAGS} -c $< -o $@
108
109${NSI_BUILD_PATH}/%.o: ${NSI_PATH}/%.c ${NSI_PATH}Makefile ${NSI_CONFIG_FILE}
110	@if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
111	${NSI_CC} ${NSI_CPPFLAGS} ${INCLUDES} ${CFLAGS} -c $< -o $@
112
113${NSI_BUILD_PATH}/linker_script.ld : ${NSI_PATH}/common/other/linker_script.pre.ld | ${NSI_BUILD_PATH}
114	${NSI_CC} -x c -E -P $< -o $@  ${DEPENDFLAGS}
115
116${NSI_BUILD_PATH}/${RUNNER_LIB}: ${OBJS}
117	if [ -f $@ ]; then rm $@ ; fi
118	${NSI_AR} -cr $@ ${OBJS}
119
120${NSI_BUILD_PATH}/%.loc_cpusw.o: /% ${NSI_CONFIG_FILE}
121	@if [ -z $< ] || [ ! -f $< ]; then \
122	  echo "Error: Input embedded CPU SW ($<) not found \
123(NSI_EMBEDDED_CPU_SW=${NSI_EMBEDDED_CPU_SW} )"; \
124	  false; \
125	fi
126	@if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
127	${NSI_OBJCOPY} --localize-hidden $< $@ -w --localize-symbol=_* ${NSI_LOCALIZE_OPTIONS}
128
129${NSI_EXE}: ${NSI_BUILD_PATH}/${RUNNER_LIB} ${LOCALIZED_EMBSW} ${NSI_EXTRA_LIBS} \
130 ${NSI_BUILD_PATH}/linker_script.ld
131	${NSI_CC} -Wl,--whole-archive ${LOCALIZED_EMBSW} ${NSI_BUILD_PATH}/${RUNNER_LIB} \
132	  ${NSI_EXTRA_LIBS} -Wl,--no-whole-archive \
133	  -o $@ ${FINALLINK_FLAGS} -T ${NSI_BUILD_PATH}/linker_script.ld
134
135Makefile: ;
136
137link_with_esw: ${NSI_EXE};
138
139runner_lib: ${NSI_BUILD_PATH}/${RUNNER_LIB}
140
141all: link_with_esw
142
143clean:
144	@echo "Deleting intermediate compilation results + libraries + executables (*.d .o .a .exe)"
145	find $(NSI_BUILD_PATH) -name "*.o" -or -name "*.exe" -or -name "*.a" -or -name "*.d" | xargs rm -f
146
147clean_coverage:
148	find $(NSI_BUILD_PATH) -name "*.gcda" -or -name "*.gcno" | xargs rm -f ; true
149
150clean_all: clean clean_coverage ;
151
152.PHONY: clean clean_coverage clean_all link_with_esw runner_lib no_default all ${DEPENDFILES}
153
154ifndef NSI_BUILD_VERBOSE
155.SILENT:
156endif
157
158help:
159	@echo "*******************************"
160	@echo "* Native Simulator makefile *"
161	@echo "*******************************"
162	@echo "Provided rules:"
163	@echo " clean           : clean all build output"
164	@echo " clean_coverage  : clean all coverage files"
165	@echo " clean_all       : clean + clean_coverage"
166	@echo " link_with_esw   : Link the runner with the CPU embedded sw"
167	@echo " runner_lib      : Build the runner itself (pending the embedded SW)"
168	@echo " all             : link_with_esw"
169	@echo "Note that you can use TAB to autocomplete rules in the command line in modern OSs"
170