Ævar Arnfjörð Bjarmason [off-list ref] writes:
Move these variables over to the shared.max, we'll make use of them in
max?
a subsequent commit. There was no reason for these to be "simply
expanded variables", so let's use the normal lazy "=" assignment here.
Seems to do unrelated things "while at it" which is a common pattern
that slows the reviews down.
quoted hunk
diff --git a/shared.mak b/shared.mak
index 1dda948df09..f6b589ffd8f 100644
--- a/shared.mak
+++ b/shared.mak
@@ -23,3 +23,11 @@
#
# info make --index-search=.DELETE_ON_ERROR
.DELETE_ON_ERROR:
+
+### Global variables
+
+## comma, empty, space: handy variables as these tokens are either
+## special or can be hard to spot among other Makefile syntax.
+comma = ,
+empty =
+space = $(empty) $(empty)
In any case, wanting to have a $(space) is not specific to the
top-level Makefile, and it is a good idea to move them to the shared
file.