How do you check if a directory exists in a Makefile?

Check if a directory exists in a Makefile You can check if a directory exists by using the wildcard function.

How do you check if a directory does not exists in bash?

1. One can check if a directory exists in a Linux shell script using the following syntax: [ -d “/path/dir/” ] && echo “Directory /path/dir/ exists.”
2. You can use ! to check if a directory does not exists on Unix: [ ! -d “/dir1/” ] && echo “Directory /dir1/ DOES NOT exists.”

How can I get PWD in Makefile?

You can use shell function: current_dir = $(shell pwd) . Or shell in combination with notdir , if you need not absolute path: current_dir = $(notdir $(shell pwd)) .

What is in Makefile?

A makefile is a special file, containing shell commands, that you create and name makefile (or Makefile depending upon the system). A makefile that works well in one shell may not execute properly in another shell. The makefile contains a list of rules. These rules tell the system what commands you want to be executed.

How to check if a directory exists in a makefile?

Check if a directory exists in a Makefile You can check if a directory exists by using the wildcard function. Let’s look at a simple example where we only want to run a download of a very large directory if it is not already present.

Is there a way to check if a file exists?

‘rm –help’ will show you the options. (I think that ‘rm -f *.o’ will do the job.) and put rm text11.o in true part not in else part. it is always giving empty string if the file text11.o is present there or not or in other words it is always executing else part.

Can a makefile be moved to another directory?

Er, no. The path must be relative to the project directory (what happens if the Makefile is moved to another directory?) The problem is that make assumes each line is a separate command. If you want a command to span multiple lines, you need to backslash escape them (except for the last one, of course), like so:

What’s the difference between false and mkdir in make?

The | indicates that make shouldn’t care about the timestamp (it’s an order-only-prerequisite ). Rather than write mkdir -p $@, you can write false to exit, or solve your case differently. If you also need to run a particular series of instructions upon the existence of a directory, you cannot use the above. In other words, it is equivalent to: