maint.mk: exempt ENODATA from a syntax-check rule

* top/maint.mk (gl_extract_significant_defines_): Also exempt ENODATA
from the sc_prohibit_always-defined_macros syntax-check rule.
Add a comment.  See this for more details:
http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/28739/focus=28795

diff --git a/ChangeLog b/ChangeLog
index a4ac818..337cd03 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-10-25  Jim Meyering  <meyering@redhat.com>
+
+       maint.mk: exempt ENODATA from a syntax-check rule
+       * top/maint.mk (gl_extract_significant_defines_): Also exempt ENODATA
+       from the sc_prohibit_always-defined_macros syntax-check rule.
+       Add a comment.  See this for more details:
+       http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/28739/focus=28795
+
 2011-10-23  Jim Meyering  <meyering@redhat.com>
 
        fts: close parent dir FD before returning from post-traversal fts_read

diff --git a/top/maint.mk b/top/maint.mk
index d51fec6..be348dd 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -749,10 +749,12 @@ gl_other_headers_ ?= \
 
 # Perl -lne code to extract "significant" cpp-defined symbols from a
 # gnulib header file, eliminating a few common false-positives.
+# The exempted names below are defined only conditionally in gnulib,
+# and hence sometimes must/may be defined in application code.
 gl_extract_significant_defines_ = \
   /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
     && $$2 !~ /(?:rpl_|_used_without_)/\
-    && $$1 !~ /^(?:NSIG)$$/\
+    && $$1 !~ /^(?:NSIG|ENODATA)$$/\
     && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
     and print $$1