From cf6d36257b9164ec7a4bcd31a3c56b6163169e02 Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Fri, 6 Jan 2012 16:07:34 -0700
Subject: [PATCH] tests: work around pdwtags 1.9 failure

On rawhide, gcc is new enough to output new DWARF information that
pdwtags has not yet learned, but the resulting 'make check' output
was rather confusing:

$ make -C src check
...
  GEN    virkeepaliveprotocol-structs
die__process_function: DW_TAG_INVALID (0x4109) @ <0x58c> not handled!
WARNING: your pdwtags program is too old
WARNING: skipping the virkeepaliveprotocol-structs test
WARNING: install dwarves-1.3 or newer
...
$ pdwtags --version
v1.9

I've filed the pdwtags deficiency as
https://bugzilla.redhat.com/show_bug.cgi?id=772358

* src/Makefile.am (PDWTAGS): Don't leave -t file behind on version
mismatch.  Soften warning message, since 1.9 is newer than 1.3.
Don't leak stderr from broken version.
---
 src/Makefile.am | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/Makefile.am b/src/Makefile.am
index 93bf54c107..0a1221ac67 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in
 
-## Copyright (C) 2005-2011 Red Hat, Inc.
+## Copyright (C) 2005-2012 Red Hat, Inc.
 ## See COPYING.LIB for the License of this software
 
 # No libraries with the exception of LIBXML should be listed
@@ -248,8 +248,12 @@ struct_prefix = (remote_|qemu_|virNet|keepalive_)
 
 PDWTAGS = \
 	$(AM_V_GEN)if (pdwtags --help) > /dev/null 2>&1; then		\
-	  pdwtags --verbose $(<:.lo=.$(OBJEXT))				\
-	    | perl -0777 -n						\
+	  pdwtags --verbose $(<:.lo=.$(OBJEXT))	> $(@F)-t1 2> $(@F)-t2;	\
+	  if test -s $(@F)-t2; then					\
+	    rm -rf $(@F)-t?;						\
+	    echo 'WARNING: pdwtags appears broken; skipping the $@ test' >&2;\
+	  else								\
+	    perl -0777 -n						\
 		-e 'foreach my $$p (split m!\n*(?:$(r1)|$(r2))\n!) {'	\
 		-e '  if ($$p =~ /^(struct|enum) $(struct_prefix)/ ||'	\
 		-e '      $$p =~ /^enum {/) {'				\
@@ -272,9 +276,10 @@ PDWTAGS = \
 		-e '    exit 8;'					\
 		-e '  }'						\
 		-e '}'							\
-		> $(@F)-t;						\
-	  case $$? in 8) exit 0;; 0) ;; *) exit 1;; esac;		\
-	  diff -u $(@F)-t $@; st=$$?; rm -f $(@F)-t; exit $$st;		\
+		< $(@F)-t1 > $(@F)-t3;					\
+	    case $$? in 8) rm -f $(@F)-t?; exit 0;; 0) ;; *) exit 1;; esac;\
+	    diff -u $(@F)-t3 $@; st=$$?; rm -f $(@F)-t?; exit $$st;	\
+	  fi;								\
 	else								\
 	  echo 'WARNING: you lack pdwtags; skipping the $@ test' >&2;	\
 	  echo 'WARNING: install the dwarves package to get pdwtags' >&2; \