Merge remote-tracking branch 'origin/maint'

* origin/maint:
  tests: do not output m4 set up.
  tests: use the generic yyerror function.
  tests: use assert instead of plain abort.
  tests: improve the generic yylex implementation.
  tests: generalize the compilation macros.
  tests: fix confusion between api.prefix and name-prefix.
  maint: gitignores.
  yacc: work around the ylwrap limitation.

Conflicts:
	NEWS
	tests/local.at

data/yacc.c

@@ -229,6 +229,8 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
 
 # b4_declare_yyparse_push_
 # ------------------------
+# Declaration of yyparse (and dependencies) when using the push parser
+# (including in pull mode).
 m4_define([b4_declare_yyparse_push_],
 [[typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
 enum { YYPUSH_MORE = 4 };
@@ -274,12 +276,14 @@ m4_define([b4_declare_yyparse],
 # Declaration that might either go into the header (if --defines)
 # or open coded in the parser body.
 m4_define([b4_shared_declarations],
-[b4_declare_yydebug[
+[b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_declare_yydebug[
 ]b4_percent_code_get([[requires]])[
 ]b4_token_enums_defines(b4_tokens)[
 ]b4_declare_yylstype[
 ]b4_declare_yyparse[
-]b4_percent_code_get([[provides]])[]dnl
+]b4_percent_code_get([[provides]])[
+]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
 ])
 
 ## -------------- ##
@@ -338,8 +342,9 @@ m4_if(b4_prefix, [yy], [],
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif
 
-]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
-               [b4_shared_declarations])[
+/* In a future release of Bison, this section will be replaced
+   by #include "@basename(]b4_spec_defines_file[@)".  */
+]b4_shared_declarations[
 
 /* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
@@ -1997,9 +2002,7 @@ b4_defines_if(
 [@output(b4_spec_defines_file@)@
 b4_copyright([Bison interface for Yacc-like parsers in C])[
 
-]b4_cpp_guard_open([b4_spec_defines_file])[
 ]b4_shared_declarations[
-]b4_cpp_guard_close([b4_spec_defines_file])[
 ]])dnl b4_defines_if
 m4_divert_pop(0)
 m4_popdef([b4_copyright_years])