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-rw-r--r--doc/make.texi5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/make.texi b/doc/make.texi
index cc5f061..62ad82e 100644
--- a/doc/make.texi
+++ b/doc/make.texi
@@ -1390,6 +1390,11 @@ Supports the @code{-L} (@code{--check-symlink-times}) flag.
@end table
+@vindex .INCLUDE_DIRS @r{(list of include directories)}
+@item .INCLUDE_DIRS
+Expands to a list of directories that @code{make} searches for
+included makefiles (@pxref{Include, , Including Other Makefiles}).
+
@end table
@node Remaking Makefiles, Overriding Makefiles, Special Variables, Makefiles