Makefile assign string to variable. ) Variables and functions in all part...
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Makefile assign string to variable. ) Variables and functions in all parts of a makefile are expanded when read, except for the shell commands in Apr 26, 2010 · 0 To override on the command line try something like: make prefix=<path to new dir> install This won't change Makefile, but will alter the variable. Simple Assignment (GNU make) Simply expanded variables generally make complicated makefile programming more predictable because they work like variables in most programming languages. Let’s define a user variable and initialize it with the output of the whoami command by using the assignment (=) operator: user= $(shell whoami) We Variables in a makefile work much the same as variables in a shell script. And for many other tasks. When you put b = $(subst 12345, foo, $(a)) the string "$ (subst 12345, foo, $ (a))" is actually saved in the b variable. For example, A variable is a name defined in a makefile to represent a string of text, called the variable's value. Target-specific variables have the same priority as any other makefile variable. Oct 7, 2013 · When you assign variables with the = sign the right-hand side is not evaluated at the time the variable is read. 6. Mar 16, 2009 · Another approach to 'getting your multi-line variable back out of the makefile' (noted by Eric Melski as 'the tricky part'), is to plan to use the subst function to replace the newlines introduced with define in your multi-line string with \n.
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