Makefile: do not rely on a shell

... and on Make's behavior of not updating `$PWD` for recursive make calls.
cp2k · Dec 6, 2018 · 60c80ff · 60c80ff
1 parent 9eb4201
commit 60c80ff
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/Makefile b/Makefile
@@ -6,7 +6,10 @@
 SHELL = /bin/sh
 #
 # the home dir is taken from the current directory.
-CP2KHOME     := $(abspath $(PWD))
+ifeq ($(CP2KHOME),)
+CP2KHOME     := $(abspath $(shell pwd))
+export CP2KHOME
+endif
 ARCH         := local
 export VERSION=sopt