5.3.2 Choosing the Shell The program used as the shell is taken from the variable SHELL. If this variable is not set in your makefile, the program /bin/sh is used as the shell. The argument(s) passed to the shell are taken from the variable .SHELLFLAGS. The default value of .SHELL...
files.o : files.c defs.h buffer.h command.h cc -c files.c utils.o : utils.c defs.h cc -c utils.c clean : rm edit main.o kbd.o command.o display.o / insert.o search.o files.o utils.o 反 斜杠(/)是换行符的意思。这样比较便于Makefile的易读。我们可以把这个内容保存在文件为“M...
# Makefile learn by lcdSRCS=main.cSRCS+=command.cSRCS+=display.cSRCS+=files.cSRCS+=insert.cSRCS+=kbd.cSRCS+=search.cSRCS+=utils.c # 语法替换OBJS=$(SRCS:.c=.o)DEPS=$(SRCS:.c=.d)# 第一个目标 all,终极目标all:editedit:$(OBJS)$(CC)-o edit$(OBJS)-include$(DEPS)# 包含触发下面的D...
1.1.3 命令(Command) 命令(Command)是CMake的基本操作单位,每个命令都有一个名字和一组参数。CMake提供了大量的内置命令,这些命令可以用来定义目标、设置变量、控制流程等。用户也可以定义自己的命令,这就是我们今天主要讨论的 add_custom_command。 1.1.4 变量(Variable) 变量(Variable)是CMake中的一个重要概念,...
command*,是make需要执行的命令,任意的Shell命令。 2. 命令前提目标 order-only prerequisites 在makefile中,有时会在依赖关系中看到竖线“|”管道符,它是作用是用来指示命令前提目标 order-only prerequisites。 事实上make工具能理解两种类型的前提目标:
-n 选项, 只运行,不执行, -d 选项,相当于--debug=a, b(basic),v(verbose),i(implicity),j(innvocation of command),m(remake files) 这里着重解释一下 -p make -p -f /dev/null 可以打印出内置变量和内置规则 变量可以分为3类, 第一类: 环境变量, 比较重要的是PATH, PW...
makefile:8: Right-hand side of a recursive variable makefile:6: In a command script ls makefile 注意,warning函数的求值方式是按照make标准的立即和延后求值算法。虽然对BAZ的赋值动作中包含了一个warning函数,但是直到BAZ在必要条件列表中被求值后,这个信息才会被输出来。
Theexportdirective takes a variable and sets it the environment for all shell commands in all the recipes: shell_env_var=Shell env var, created inside of Makeexportshell_env_varall:echo$(shell_env_var)echo $$shell_env_var As such, when you run themakecommand inside of make, you can us...
# so use a variable for '#' HASH=\# PREFIX ?= /usr/local BIN_PATH = $(PREFIX)/bin HELPER_PATH = $(PREFIX)/lib/afl DOC_PATH = $(PREFIX)/share/doc/afl MISC_PATH = $(PREFIX)/share/afl MAN_PATH = $(PREFIX)/share/man/man8 PROGNAME...
You might have to check, whether theCIRCUITPY_ULABvariable is set to1for the port that you want to compile for. You find this piece of information in themakefragment: circuitpython/ports/port_of_your_choice/mpconfigport.mk After this, you would runmakewith the singleBOARDargument, e.g.:...