[PATCH 3/3] tests: fix AT_BISON_CHECK_WARNINGS_ stderr rewriting

[Theophile Ranquet]

* tests/input.at (Deprecated directives): Avoid spurious error.
* tests/locat.at (AT_BISON_CHECK_WARNINGS): Adjust for recent changes.
---
 tests/local.at | 35 ++++-------------------------------
 1 file changed, 4 insertions(+), 31 deletions(-)

diff --git a/tests/local.at b/tests/local.at
index f457d9a..b619338 100644
--- a/tests/local.at
+++ b/tests/local.at
@@ -445,10 +445,6 @@ m4_define([AT_BISON_CHECK],
 [m4_null_if([$2], [AT_BISON_CHECK_XML($@)])
 AT_BISON_CHECK_NO_XML($@)])
 
-m4_define([AT_BISON_WERROR_MSG],
-          [[bison: warnings being treated as errors]])
-
-
 # AT_BISON_CHECK_(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
 # --------------------------------------------------
 # Low-level macro to run bison once.
@@ -483,33 +479,10 @@ if env | grep '^POSIXLY_CORRECT=' >/dev/null; then :; else
 
   # Build expected stderr up to and including the "warnings being
   # treated as errors" message.
-  ]AT_DATA([[at-bison-check-warnings]], [$4])[
-  at_bison_check_first=`sed -n \
-    '/: warning: /{=;q;}' at-bison-check-warnings`
-  : ${at_bison_check_first:=1}
-  at_bison_check_first_tmp=`sed -n \
-    '/conflicts: [0-9].*reduce$/{=;q;}' at-bison-check-warnings`
-  : ${at_bison_check_first_tmp:=1}
-  if test $at_bison_check_first_tmp -lt $at_bison_check_first; then
-    at_bison_check_first=$at_bison_check_first_tmp
-  fi
-  if test $at_bison_check_first -gt 1; then
-    sed -n "1,`expr $at_bison_check_first - 1`"p \
-      at-bison-check-warnings > experr
-  fi
-  echo ']AT_BISON_WERROR_MSG[' >> experr
-
-  # Finish building expected stderr and check.  Unlike warnings,
-  # complaints cause bison to exit early.  Thus, with -Werror, bison
-  # does not necessarily report all warnings that it does without
-  # -Werror, but it at least reports one.
-  at_bison_check_last=`sed -n '$=' stderr`
-  : ${at_bison_check_last:=1}
-  at_bison_check_last=`expr $at_bison_check_last - 1`
-  sed -n "$at_bison_check_first,$at_bison_check_last"p \
-    at-bison-check-warnings >> experr
-  ]AT_CHECK([[sed 's,.*/\(]AT_BISON_WERROR_MSG[\)$,\1,' \
-              stderr 1>&2]], [[0]], [[]], [experr])[
+  ]AT_DATA([[experr]], [$4])[
+  $PERL -pi -e 's{(.*): warning: (.*)\[-W(.*)\]$}
+                 {$][1: error: $][2\@<:@-Werror=$][3@:>@}' experr
+  ]AT_CHECK([[sed 's,.*/$,,' stderr 1>&2]], [[0]], [[]], [experr])[
 
   # Now check --warnings=error.
   cp stderr experr
-- 
1.7.11.4