How to assign a makefile variable to a command result?
I’m trying to assign the output of this command ( that is in my makefile ) to the makefile HEADER var like in this following line of code: And if I run this command directly in the console, and directly where my makefile is:
How to set shell variables in a recipe?
Please note: this implies that setting shell variables and invoking shell commands such as cd that set a context local to each process will not affect the following lines in the recipe.2 If you want to use cd to affect the next statement, put both statements in a single recipe line
Where do I find VAR1 and var2 in makefile?
I would like environment variables var1 and var2 to be visible in task1.csh and task2.csh, but I haven’t been able to do so unless I change the makefile to: Why the first method doesn’t work and how can I fix it?
Why does make not assign a variable to a Bash command result?
The problem here is that make will try to expand $f as a variable, and since it doesn’t find anything, it simply replaces it with “”. That leaves your shell command with nothing but echo ile, which it faithfully does.
What does adding$$ do to Makefile in shell?
Adding $$ tells make to place a single $ at that position, which results in the shell command looking exactly the way you want it to. The makefile tutorial suggested to use wildcard to get list of files in a directory. In your case, it means this :
Why are$ signs interpreted as variable in makefile?
$ signs are notorious in makefiles for causing trouble because they are interpreted as variable markers. Here just doubling the one in the first line should do the trick: Also have a look at other posts to learn more about makefile escaping issues.
How to pass variables from one script to another in Bash?
Source the 2nd script, i.e. . test2.shand it will run in the same shell. This would let you share more complex variables like arrays easily, but also means that the other script could modify variables in the source shell. UPDATE: To use exportto set an environment variable, you can either use an existing variable: