From 317d2c6384839f43d8dd472dc1961fcf21ec181d Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Sun, 21 Dec 2008 17:37:22 +0100
Subject: maint.mk: enforce the "include <config.h> first" rule

* maint.mk (sc_require_config_h_first): New rule.
* .x-sc_require_config_h_first: New file.
---
 maint.mk | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'maint.mk')

diff --git a/maint.mk b/maint.mk
index cb3c6a56d..7a9649e10 100644
--- a/maint.mk
+++ b/maint.mk
@@ -191,6 +191,21 @@ sc_require_config_h:
 	else :;								\
 	fi
 
+# You must include <config.h> before including any other header file.
+sc_require_config_h_first:
+	@if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then		\
+	  fail=0;							\
+	  for i in $$($(VC_LIST_EXCEPT) | grep '\.c$$'); do		\
+	    grep '^# *include\>' $$i | sed 1q				\
+		| grep '^# *include <config\.h>' > /dev/null		\
+	      || { echo $$i; fail=1; };					\
+	  done;								\
+	  test $$fail = 1 &&						\
+	    { echo '$(ME): the above files include some other header'	\
+		'before <config.h>' 1>&2; exit 1; } || :;		\
+	else :;								\
+	fi
+
 # To use this "command" macro, you must first define two shell variables:
 # h: the header, enclosed in <> or ""
 # re: a regular expression that matches IFF something provided by $h is used.
-- 
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