On Mon, 22 Mar 2021 at 21:33, Richard Forst <sterbl...@tutanota.com> wrote:
> I have a Makefile used to check whether svn command existing or not. The > content is below > > all: > $(eval svnbin=$(shell basename $(shell which svn))) > $(info X$(svnbin)Y) > $(echo X$(svnbin)Y) > ifneq ($(strip $(svnbin)),svn) > @echo "$(svnbin)=/=svn" > endif > > However, `make` command prints following to the console > > XsvnY > svn=/=svn > What might cause this printout to console? Or anywhere I should check for > debugging? Hi, it might become clearer if you keep in mind that a makefile is not a script that executes from top to bottom. I suggest you read the below reference [1] carefully, especially the first two paragraphs, note: "GNU make does its work in two distinct phases." Simplified version: - Phase 1 sets up all the variables and dependencies. - Phase 2 runs any recipes requires to update targets. Your 'ifneq' directive is actioned during phase 1. Your 'echo' commands are run later, in phase 2. [1] https://www.gnu.org/software/make/manual/html_node/Reading-Makefiles.html#Reading-Makefiles
