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-rw-r--r--shared.mak8
1 files changed, 8 insertions, 0 deletions
diff --git a/shared.mak b/shared.mak
index 1dda948df0..934bf42893 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)