maint.mk: also prohibit lower-case @var@

* top/maint.mk (sc_makefile_at_at_check): Enhance check to cover
lower case, like @top_srcdir@.

Signed-off-by: Eric Blake <eblake@redhat.com>

diff --git a/ChangeLog b/ChangeLog
index 210bd10..acc2e4f 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-02-07  Eric Blake  <eblake@redhat.com>
+
+       maint.mk: also prohibit lower-case @var@
+       * top/maint.mk (sc_makefile_at_at_check): Enhance check to cover
+       lower case, like @top_srcdir@.
+
 2012-02-04  Eric Blake  <eblake@redhat.com>
 
        canonicalize: avoid uninitialized memory use

diff --git a/top/maint.mk b/top/maint.mk
index be7ba49..1dd6493 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -1015,8 +1015,8 @@ update-NEWS-hash: NEWS
 # setting this to ' && !/PRAGMA_SYSTEM_HEADER/'.
 _makefile_at_at_check_exceptions ?=
 sc_makefile_at_at_check:
-       @perl -ne '/\@[A-Z_0-9]+\@/'                                    \
-          -e ' && !/([A-Z_0-9]+)\s+=.*\@\1\@$$/'                       \
+       @perl -ne '/\@\w+\@/'                                           \
+          -e ' && !/(\w+)\s+=.*\@\1\@$$/'                              \
           -e ''$(_makefile_at_at_check_exceptions)                     \
          -e 'and (print "$$ARGV:$$.: $$_"), $$m=1; END {exit !$$m}'    \
            $$($(VC_LIST_EXCEPT) | grep -E '(^|/)(Makefile\.am|[^/]+\.mk)$$') \