[PATCH] maint.mk: add three prohibit-header-without-use rules

[Jim Meyering]

This was prompted by Pádraig's coreutils patch:
  http://thread.gmane.org/gmane.comp.gnu.coreutils.general/1282

>From 1b20f727196f5f3361c2edf5ca28ac0032425706 Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Fri, 3 Jun 2011 17:35:07 +0200
Subject: [PATCH] maint.mk: add three prohibit-header-without-use rules

Prohibit use of cloexec.h, posixver.h, same.h without use.
* top/maint.mk (sc_prohibit_cloexec_without_use): New rule.
(sc_prohibit_posixver_without_use): Likewise.
(sc_prohibit_same_without_use): Likewise.
---
 ChangeLog    |    8 ++++++++
 top/maint.mk |   10 ++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 561ff83..fbd5ccd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-06-03  Jim Meyering  <address@hidden>
+
+       maint: three new prohibit-header-without-use rules
+       Prohibit use of cloexec.h, posixver.h, same.h without use.
+       * top/maint.mk (sc_prohibit_cloexec_without_use): New rule.
+       (sc_prohibit_posixver_without_use): Likewise.
+       (sc_prohibit_same_without_use): Likewise.
+
 2011-06-02  Paul Eggert  <address@hidden>

        allocator: 'die' routine is now given requested size
diff --git a/top/maint.mk b/top/maint.mk
index 9f20900..c55571c 100644
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -495,6 +495,16 @@ sc_prohibit_hash_without_use:
        re='$(_hash_fn)|$(_hash_struct)'\
          $(_sc_header_without_use)

+sc_prohibit_cloexec_without_use:
+       @h='"cloexec.h"' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
+         $(_sc_header_without_use)
+
+sc_prohibit_posixver_without_use:
+       @h='"posixver.h"' re='\<posix2_version *\(' $(_sc_header_without_use)
+
+sc_prohibit_same_without_use:
+       @h='"same.h"' re='\<same_name *\(' $(_sc_header_without_use)
+
 sc_prohibit_hash_pjw_without_use:
        @h='"hash-pjw.h"' \
        re='\<hash_pjw *\(' \
--
1.7.6.rc0.254.gf37de