Setting (GNU make)
To set a variable from the makefile, write a line starting with the variable name followed by one of the assignment operators ‘ = ’, ‘:= ’, ‘::= ’, or ‘:::= ’. Whatever follows the operator and any initial whitespace on the line becomes the value. For example, defines a variable named objects to contain the value ‘ main.o foo.o bar.o utils.o ’.
GNU make - How to Use Variables
Variables in make can come from the environment in which make is run. Every environment variable that make sees when it starts up is transformed into a make variable with the same name and value. But an explicit assignment in the makefile, or with a …
Makefile基础学习_make-setting -march-CSDN博客
2019年6月26日 · make运行时的系统环境变量可以在make开始运行时被载入到Makefile文件中，但是如果Makefile中已经定义了这个变量，或者这个变量由make命令行带入，那么系统的环境变 …
Setting make options in a makefile - Stack Overflow
2011年11月30日 · As far as I know it's not possible to modify e.g. the -j value or add the behaviour of -d run-time in a Makefile. However, one nice workaround is adding a target like this: make -d debugtarget. Now make debug works just like make -d debugtarget. You can even make "debug" your default target and get the same effect with just make.
GNU Make - Setting Variables - 简体中文 - Runebook.dev
Setting Variables. 要从 makefile 设置变量，请编写一行，以变量名开头，后跟赋值运算符之一 ' = ’, ‘:= ’, ‘::= '， 或者 ':::= '。运算符后面的任何内容以及行上的任何初始空格都将成为值。例如，
Using Variables (GNU make) - chiark
How to set a variable in the makefile. How to append more text to the old value of a variable. How to set a variable in the makefile even if the user has set it with a command argument. An alternate way to set a variable to a multi-line string. How to undefine a variable so that it …
Passing additional variables from command line to make
2010年5月13日 · You have several options to set up variables from outside your makefile: From environment - each environment variable is transformed into a makefile variable with the same name and value. You may also want to set -e option (aka --environments-override ) on, and your environment variables will override assignments made into makefile (unless ...
Quick Reference (GNU make)
You can set this in the environment or a makefile to set make command-line flags. GNU make never sets this variable itself. This variable is only needed if you’d like to set GNU make -specific flags in a POSIX-compliant makefile.
Setting Variables - GNU Make - W3cubDocs
Setting Variables. To set a variable from the makefile, write a line starting with the variable name followed by ‘=’, ‘:=’, or ‘::=’. Whatever follows the ‘=’, ‘:=’, or ‘::=’ on the line becomes the value. For example,
Special Variables (GNU make)
GNU make supports some variables that have special properties. Contains the name of each makefile that is parsed by make, in the order in which it was parsed. The name is appended just before make begins to parse the makefile.