# Looks in the PATH if the argument contains no slash, else only considers one
# specific directory. Returns an # empty string if the program doesn't exist
# there.
-find-in-path = $(if $(find-string /, $1), \
+find-in-path = $(if $(findstring /, $1), \
$(wildcard $1), \
$(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))