Merge branch 'maint'

* maint:
  sync: update files from upstream with "make fetch"
  maintcheck: remove outdated whitelisting
  tar: format 'ustar' cannot support UID/GID longer than 21 bits
  docs: issues with configure substitutions in TESTS
  tests: avoid possible autotools caching issues (automake bug#13832)
  tests: rename some with more descriptive names
  docs: add myself and Ralf Wildenhues as authors
  authors: add myself
  dry-run: don't get confused by '-I' option
  tests: avoid a spurious failure with the Korn Shell
  dry-run: with GNU make, prefer $(MFLAGS) over $(MAKEFLAGS)
  header vars: can determine whether we are running under GNU make
  NEWS: improve wording for automake bug#13514 fix
  NEWS: document fix for automake bug#13514

1 files changed, 8 insertions, 0 deletions

diff --git a/doc/automake.texi b/doc/automake.texi
index ec17160d8..9c46b5c45 100644
--- a/doc/automake.texi
+++ b/doc/automake.texi
@@ -53,6 +53,8 @@ section entitled ``GNU Free Documentation License.''
 @author David MacKenzie
 @author Tom Tromey
 @author Alexandre Duret-Lutz
+@author Ralf Wildenhues
+@author Stefano Lattarini
 @page
 @vskip 0pt plus 1filll
 @insertcopying
@@ -9086,6 +9088,12 @@ followed by any number of alphabetic characters.
 For example, @samp{.sh}, @samp{.T} and @samp{.t1} are valid extensions,
 while @samp{.x-y}, @samp{.6c} and @samp{.t.1} are not.
 
+@cindex Configure substitutions in @code{TESTS}
+It is important to note that, due to current limitations (unlikely to be
+lifted), configure substitutions in the definition of @code{TESTS} can
+only work if they will expand to a list of tests that have a suffix listed
+in @code{TEST_EXTENSIONS}.
+
 @vindex _LOG_COMPILE
 @vindex _LOG_COMPILER
 @vindex _LOG_FLAGS