Build: Only sed through an input file if it exists.

diff --git a/stepmake/stepmake/texinfo-vars.make b/stepmake/stepmake/texinfo-vars.make
index d164356555ded29e50d405e3364a554d27f99f4c..c370990413aa65b4da9a4ac74954a80dc9ddb93e 100644 (file)
--- a/stepmake/stepmake/texinfo-vars.make
+++ b/stepmake/stepmake/texinfo-vars.make
@@ -20,7 +20,7 @@ $(firstword \
 # Recursively scan the file $(1) for @include, search for included files
 # within the texinfo include dirs, and return all dependencies.
 scan-texi = \
-$(foreach f, $(shell sed -ne "/^@include[[:space:]]/s/@include//p" $(1)), \
+$(foreach f, $(shell test -f $(1) && sed -ne "/^@include[[:space:]]/s/@include//p" $(1)), \
        $(call find-texi,$(f)) \
        $(call scan-texi,$(call find-texi,$(f))) \
 )