c: no longer require stdio.h when locations are enabled

Recent changes (in 2.7) introduced a dependency on both FILE and
fprintf, which are "available" only in %debug mode.  This was to
define yy_location_print_, which is used only in %debug mode by the
parser, but massively used by the test suite to output the locations
in yyerror.

Break this dependency: the test suite should define its own routines
to display the locations.  Eventually Bison will provide the user with
a means to display locations, but not yet.

* data/c.m4 (b4_yy_location_print_define): Use YYFPRINTF instead of
fprintf directly.
* data/yacc.c (b4_yy_location_print_define): Invoke it only in %debug
mode, so that stdio.h is included (needed for FILE*), and YYFPRINTF
is defined.

* tests/local.at (AT_YYERROR_DECLARE, AT_YYERROR_DEFINE): Declare
and define location_print and LOCATION_PRINT.

* tests/actions.at, tests/existing.at, tests/glr-regression.at,
* tests/input.at, tests/named-refs.at, tests/regression.at: Adjust
to use them.
Fix the expected line numbers (as the prologue's length has changed).

1 files changed, 18 insertions, 13 deletions

diff --git a/tests/named-refs.at b/tests/named-refs.at
index ec44e049..1b76c800 100644
--- a/tests/named-refs.at
+++ b/tests/named-refs.at
@@ -188,7 +188,9 @@ AT_CLEANUP
 
 
 
-#######################################################################
+## ------------------------------------ ##
+## Undefined and ambiguous references.  ##
+## ------------------------------------ ##
 
 
 AT_SETUP([Undefined and ambiguous references])
@@ -250,44 +252,47 @@ exp:
 ]])
 
 AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
-[[test.y:50.51-60: error: invalid reference: '$<ival>lo9'
+[[test.y:52.51-60: error: invalid reference: '$<ival>lo9'
  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
                                                    ^^^^^^^^^^
-test.y:50.3-68:      symbol not found in production: lo9
+test.y:52.3-68:      symbol not found in production: lo9
  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-test.y:51.51-60: warning: misleading reference: '$<ival>exp' [-Wother]
+test.y:53.51-60: warning: misleading reference: '$<ival>exp' [-Wother]
  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
                                                    ^^^^^^^^^^
-test.y:42.1-3:       refers to: $exp at $$
+test.y:44.1-3:       refers to: $exp at $$
  exp:
  ^^^
-test.y:51.7:         possibly meant: $x, hiding $exp at $1
+test.y:53.7:         possibly meant: $x, hiding $exp at $1
  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
        ^
-test.y:51.41:        possibly meant: $r, hiding $exp at $4
+test.y:53.41:        possibly meant: $r, hiding $exp at $4
  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
                                          ^
-test.y:52.51-52: error: $l of 'exp' has no declared type
+test.y:54.51-52: error: $l of 'exp' has no declared type
  | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
                                                    ^^
-test.y:55.40-43: error: invalid reference: '$r12'
+test.y:57.40-43: error: invalid reference: '$r12'
  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
                                         ^^^^
-test.y:55.3-47:      symbol not found in production: r12
+test.y:57.3-47:      symbol not found in production: r12
  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-test.y:56.29-33: error: invalid reference: '$expo'
+test.y:58.29-33: error: invalid reference: '$expo'
  | '(' exp ')'        { $$ = $expo;           }
                              ^^^^^
-test.y:56.3-46:      symbol not found in production: expo
+test.y:58.3-46:      symbol not found in production: expo
  | '(' exp ')'        { $$ = $expo;           }
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ]])
 AT_BISON_OPTION_POPDEFS
 AT_CLEANUP
 
-#######################################################################
+
+## ----------------------- ##
+## Misleading references.  ##
+## ----------------------- ##
 
 AT_SETUP([Misleading references])
 AT_DATA_GRAMMAR([test.y],