dnl support is rapidly evolving, let's keep that information to be careful.
dnl However, we don't do diffs for canonical LR(1) because the diff is huge.
m4_pushdef([AT_LALR1_DIFF_CHECK],
-[AT_CHECK([[sed 's/^%define lr.type .*$//' input.y > input-lalr.y]])
+[dnl We need diff -u, which is not portable.
+AT_CHECK([diff -u /dev/null /dev/null || exit 77], [0], [ignore])
+
+AT_CHECK([[sed 's/^%define lr.type .*$//' input.y > input-lalr.y]])
AT_BISON_CHECK([[--report=all input-lalr.y]], [[0]], [ignore], [ignore])
AT_CHECK([[diff -u input-lalr.output input.output \
| sed -n '/^@@/,$p' | sed 's/^ $//']],
dnl BISON-STDERR
[AT_COND_CASE([[canonical LR]],
-[[input.y: conflicts: 265 shift/reduce]],
-[[input.y: conflicts: 65 shift/reduce]])[
+[[input.y: warning: 265 shift/reduce conflicts [-Wconflicts-sr]]],
+[[input.y: warning: 65 shift/reduce conflicts [-Wconflicts-sr]]])[
]],
dnl LAST-STATE
dnl BISON-STDERR
[AT_COND_CASE([[canonical LR]],
-[[input.y: conflicts: 1876 shift/reduce, 144 reduce/reduce]],
-[[input.y: conflicts: 78 shift/reduce, 10 reduce/reduce]])[
+[[input.y: warning: 1876 shift/reduce conflicts [-Wconflicts-sr]
+input.y: warning: 144 reduce/reduce conflicts [-Wconflicts-rr]]],
+[[input.y: warning: 78 shift/reduce conflicts [-Wconflicts-sr]
+input.y: warning: 10 reduce/reduce conflicts [-Wconflicts-rr]]])[
]],
dnl LAST-STATE
[[VARIABLE, '=', LABEL, LEFT, DOT_X]],
dnl BISON-STDERR
-[[input.y:470.11-48: warning: rule useless in parser due to conflicts: path: ORDINAL LAST object_type relative_path
+[[input.y:470.11-48: warning: rule useless in parser due to conflicts: path: ORDINAL LAST object_type relative_path [-Wother]
]],
dnl LAST-STATE