Use "%option prefix" to set API names in ecpg's lexer.

Back-patch commit 92fb64983 into the pre-9.6 branches.

Without this, ecpg fails to build with the latest version of flex.
It's not unreasonable that people would want to compile our old branches
with recent tools.  Per report from Дилян Палаузов.

Discussion: https://postgr.es/m/d845c1af-e18d-6651-178f-9f08cdf37e10@aegee.org

9 files changed, 136 insertions, 141 deletions

diff --git a/src/interfaces/ecpg/preproc/descriptor.c b/src/interfaces/ecpg/preproc/descriptor.c
index 22ee6bf204..2f3799fdf0 100644
--- a/src/interfaces/ecpg/preproc/descriptor.c
+++ b/src/interfaces/ecpg/preproc/descriptor.c
@@ -58,7 +58,7 @@ ECPGnumeric_lvalue(char *name)
 		case ECPGt_unsigned_long:
 		case ECPGt_unsigned_long_long:
 		case ECPGt_const:
-			fputs(name, yyout);
+			fputs(name, base_yyout);
 			break;
 		default:
 			mmerror(PARSE_ERROR, ET_ERROR, "variable \"%s\" must have a numeric type", name);
@@ -152,7 +152,7 @@ output_get_descr_header(char *desc_name)
 {
 	struct assignment *results;
 
-	fprintf(yyout, "{ ECPGget_desc_header(__LINE__, %s, &(", desc_name);
+	fprintf(base_yyout, "{ ECPGget_desc_header(__LINE__, %s, &(", desc_name);
 	for (results = assignments; results != NULL; results = results->next)
 	{
 		if (results->value == ECPGd_count)
@@ -162,7 +162,7 @@ output_get_descr_header(char *desc_name)
 	}
 
 	drop_assignments();
-	fprintf(yyout, "));\n");
+	fprintf(base_yyout, "));\n");
 	whenever_action(3);
 }
 
@@ -171,7 +171,7 @@ output_get_descr(char *desc_name, char *index)
 {
 	struct assignment *results;
 
-	fprintf(yyout, "{ ECPGget_desc(__LINE__, %s, %s,", desc_name, index);
+	fprintf(base_yyout, "{ ECPGget_desc(__LINE__, %s, %s,", desc_name, index);
 	for (results = assignments; results != NULL; results = results->next)
 	{
 		const struct variable *v = find_variable(results->variable);
@@ -188,12 +188,13 @@ output_get_descr(char *desc_name, char *index)
 			default:
 				break;
 		}
-		fprintf(yyout, "%s,", get_dtype(results->value));
-		ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
+		fprintf(base_yyout, "%s,", get_dtype(results->value));
+		ECPGdump_a_type(base_yyout, v->name, v->type, v->brace_level,
+						NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
 		free(str_zero);
 	}
 	drop_assignments();
-	fputs("ECPGd_EODT);\n", yyout);
+	fputs("ECPGd_EODT);\n", base_yyout);
 
 	whenever_action(2 | 1);
 }
@@ -203,7 +204,7 @@ output_set_descr_header(char *desc_name)
 {
 	struct assignment *results;
 
-	fprintf(yyout, "{ ECPGset_desc_header(__LINE__, %s, (int)(", desc_name);
+	fprintf(base_yyout, "{ ECPGset_desc_header(__LINE__, %s, (int)(", desc_name);
 	for (results = assignments; results != NULL; results = results->next)
 	{
 		if (results->value == ECPGd_count)
@@ -213,7 +214,7 @@ output_set_descr_header(char *desc_name)
 	}
 
 	drop_assignments();
-	fprintf(yyout, "));\n");
+	fprintf(base_yyout, "));\n");
 	whenever_action(3);
 }
 
@@ -264,7 +265,7 @@ output_set_descr(char *desc_name, char *index)
 {
 	struct assignment *results;
 
-	fprintf(yyout, "{ ECPGset_desc(__LINE__, %s, %s,", desc_name, index);
+	fprintf(base_yyout, "{ ECPGset_desc(__LINE__, %s, %s,", desc_name, index);
 	for (results = assignments; results != NULL; results = results->next)
 	{
 		const struct variable *v = find_variable(results->variable);
@@ -295,9 +296,11 @@ output_set_descr(char *desc_name, char *index)
 			case ECPGd_length:
 			case ECPGd_type:
 				{
-					char *str_zero = mm_strdup("0");
-					fprintf(yyout, "%s,", get_dtype(results->value));
-					ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
+					char	   *str_zero = mm_strdup("0");
+
+					fprintf(base_yyout, "%s,", get_dtype(results->value));
+					ECPGdump_a_type(base_yyout, v->name, v->type, v->brace_level,
+						   NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
 					free(str_zero);
 				}
 				break;
@@ -307,7 +310,7 @@ output_set_descr(char *desc_name, char *index)
 		}
 	}
 	drop_assignments();
-	fputs("ECPGd_EODT);\n", yyout);
+	fputs("ECPGd_EODT);\n", base_yyout);
 
 	whenever_action(2 | 1);
 }
diff --git a/src/interfaces/ecpg/preproc/ecpg.addons b/src/interfaces/ecpg/preproc/ecpg.addons
index 5559863ff6..3513139ae7 100644
--- a/src/interfaces/ecpg/preproc/ecpg.addons
+++ b/src/interfaces/ecpg/preproc/ecpg.addons
@@ -8,7 +8,7 @@ ECPG: stmtClosePortalStmt block
 				if (connection)
 					mmerror(PARSE_ERROR, ET_ERROR, "AT option not allowed in CLOSE DATABASE statement");
 
-				fprintf(yyout, "{ ECPGdisconnect(__LINE__, \"CURRENT\");");
+				fprintf(base_yyout, "{ ECPGdisconnect(__LINE__, \"CURRENT\");");
 				whenever_action(2);
 				free($1);
 				break;
@@ -42,14 +42,14 @@ ECPG: stmtPrepareStmt block
 	}
 ECPG: stmtTransactionStmt block
 	{
-		fprintf(yyout, "{ ECPGtrans(__LINE__, %s, \"%s\");", connection ? connection : "NULL", $1);
+		fprintf(base_yyout, "{ ECPGtrans(__LINE__, %s, \"%s\");", connection ? connection : "NULL", $1);
 		whenever_action(2);
 		free($1);
 	}
 ECPG: stmtViewStmt rule
 	| ECPGAllocateDescr
 	{
-		fprintf(yyout,"ECPGallocate_desc(__LINE__, %s);",$1);
+		fprintf(base_yyout,"ECPGallocate_desc(__LINE__, %s);",$1);
 		whenever_action(0);
 		free($1);
 	}
@@ -58,7 +58,7 @@ ECPG: stmtViewStmt rule
 		if (connection)
 			mmerror(PARSE_ERROR, ET_ERROR, "AT option not allowed in CONNECT statement");
 
-		fprintf(yyout, "{ ECPGconnect(__LINE__, %d, %s, %d); ", compat, $1, autocommit);
+		fprintf(base_yyout, "{ ECPGconnect(__LINE__, %d, %s, %d); ", compat, $1, autocommit);
 		reset_variables();
 		whenever_action(2);
 		free($1);
@@ -69,7 +69,7 @@ ECPG: stmtViewStmt rule
 	}
 	| ECPGDeallocateDescr
 	{
-		fprintf(yyout,"ECPGdeallocate_desc(__LINE__, %s);",$1);
+		fprintf(base_yyout,"ECPGdeallocate_desc(__LINE__, %s);",$1);
 		whenever_action(0);
 		free($1);
 	}
@@ -79,10 +79,10 @@ ECPG: stmtViewStmt rule
 	}
 	| ECPGDescribe
 	{
-		fprintf(yyout, "{ ECPGdescribe(__LINE__, %d, %s,", compat, $1);
+		fprintf(base_yyout, "{ ECPGdescribe(__LINE__, %d, %s,", compat, $1);
 		dump_variables(argsresult, 1);
-		fputs("ECPGt_EORT);", yyout);
-		fprintf(yyout, "}");
+		fputs("ECPGt_EORT);", base_yyout);
+		fprintf(base_yyout, "}");
 		output_line_number();
 
 		free($1);
@@ -92,7 +92,7 @@ ECPG: stmtViewStmt rule
 		if (connection)
 			mmerror(PARSE_ERROR, ET_ERROR, "AT option not allowed in DISCONNECT statement");
 
-		fprintf(yyout, "{ ECPGdisconnect(__LINE__, %s);",
+		fprintf(base_yyout, "{ ECPGdisconnect(__LINE__, %s);",
 				$1 ? $1 : "\"CURRENT\"");
 		whenever_action(2);
 		free($1);
@@ -103,11 +103,11 @@ ECPG: stmtViewStmt rule
 		const char *con = connection ? connection : "NULL";
 
 		if (strcmp($1, "all") == 0)
-			fprintf(yyout, "{ ECPGdeallocate_all(__LINE__, %d, %s);", compat, con);
+			fprintf(base_yyout, "{ ECPGdeallocate_all(__LINE__, %d, %s);", compat, con);
 		else if ($1[0] == ':')
-			fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, %s);", compat, con, $1+1);
+			fprintf(base_yyout, "{ ECPGdeallocate(__LINE__, %d, %s, %s);", compat, con, $1+1);
 		else
-			fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, \"%s\");", compat, con, $1);
+			fprintf(base_yyout, "{ ECPGdeallocate(__LINE__, %d, %s, \"%s\");", compat, con, $1);
 
 		whenever_action(2);
 		free($1);
@@ -138,7 +138,7 @@ ECPG: stmtViewStmt rule
 	}
 	| ECPGSetAutocommit
 	{
-		fprintf(yyout, "{ ECPGsetcommit(__LINE__, \"%s\", %s);", $1, connection ? connection : "NULL");
+		fprintf(base_yyout, "{ ECPGsetcommit(__LINE__, \"%s\", %s);", $1, connection ? connection : "NULL");
 		whenever_action(2);
 		free($1);
 	}
@@ -147,7 +147,7 @@ ECPG: stmtViewStmt rule
 		if (connection)
 			mmerror(PARSE_ERROR, ET_ERROR, "AT option not allowed in SET CONNECTION statement");
 
-		fprintf(yyout, "{ ECPGsetconn(__LINE__, %s);", $1);
+		fprintf(base_yyout, "{ ECPGsetconn(__LINE__, %s);", $1);
 		whenever_action(2);
 		free($1);
 	}
@@ -169,7 +169,7 @@ ECPG: stmtViewStmt rule
 		if (connection)
 			mmerror(PARSE_ERROR, ET_ERROR, "AT option not allowed in TYPE statement");
 
-		fprintf(yyout, "%s", $1);
+		fprintf(base_yyout, "%s", $1);
 		free($1);
 		output_line_number();
 	}
diff --git a/src/interfaces/ecpg/preproc/ecpg.c b/src/interfaces/ecpg/preproc/ecpg.c
index 3a72ba9692..d09dc48ef4 100644
--- a/src/interfaces/ecpg/preproc/ecpg.c
+++ b/src/interfaces/ecpg/preproc/ecpg.c
@@ -162,11 +162,11 @@ main(int argc, char *const argv[])
 			case 'o':
 				output_filename = optarg;
 				if (strcmp(output_filename, "-") == 0)
-					yyout = stdout;
+					base_yyout = stdout;
 				else
-					yyout = fopen(output_filename, PG_BINARY_W);
+					base_yyout = fopen(output_filename, PG_BINARY_W);
 
-				if (yyout == NULL)
+				if (base_yyout == NULL)
 				{
 					fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
 							progname, output_filename, strerror(errno));
@@ -229,7 +229,7 @@ main(int argc, char *const argv[])
 				break;
 			case 'd':
 #ifdef YYDEBUG
-				yydebug = 1;
+				base_yydebug = 1;
 #else
 				fprintf(stderr, _("%s: parser debug support (-d) not available\n"),
 						progname);
@@ -276,7 +276,7 @@ main(int argc, char *const argv[])
 			{
 				input_filename = mm_alloc(strlen("stdin") + 1);
 				strcpy(input_filename, "stdin");
-				yyin = stdin;
+				base_yyin = stdin;
 			}
 			else
 			{
@@ -300,13 +300,13 @@ main(int argc, char *const argv[])
 					ptr2ext[4] = '\0';
 				}
 
-				yyin = fopen(input_filename, PG_BINARY_R);
+				base_yyin = fopen(input_filename, PG_BINARY_R);
 			}
 
 			if (out_option == 0)	/* calculate the output name */
 			{
 				if (strcmp(input_filename, "stdin") == 0)
-					yyout = stdout;
+					base_yyout = stdout;
 				else
 				{
 					output_filename = strdup(input_filename);
@@ -316,8 +316,8 @@ main(int argc, char *const argv[])
 					ptr2ext[1] = (header_mode == true) ? 'h' : 'c';
 					ptr2ext[2] = '\0';
 
-					yyout = fopen(output_filename, PG_BINARY_W);
-					if (yyout == NULL)
+					base_yyout = fopen(output_filename, PG_BINARY_W);
+					if (base_yyout == NULL)
 					{
 						fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
 								progname, output_filename, strerror(errno));
@@ -328,7 +328,7 @@ main(int argc, char *const argv[])
 				}
 			}
 
-			if (yyin == NULL)
+			if (base_yyin == NULL)
 				fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
 						progname, argv[fnr], strerror(errno));
 			else
@@ -423,23 +423,23 @@ main(int argc, char *const argv[])
 				/* we need several includes */
 				/* but not if we are in header mode */
 				if (regression_mode)
-					fprintf(yyout, "/* Processed by ecpg (regression mode) */\n");
+					fprintf(base_yyout, "/* Processed by ecpg (regression mode) */\n");
 				else
-					fprintf(yyout, "/* Processed by ecpg (%d.%d.%d) */\n", MAJOR_VERSION, MINOR_VERSION, PATCHLEVEL);
+					fprintf(base_yyout, "/* Processed by ecpg (%d.%d.%d) */\n", MAJOR_VERSION, MINOR_VERSION, PATCHLEVEL);
 
 				if (header_mode == false)
 				{
-					fprintf(yyout, "/* These include files are added by the preprocessor */\n#include <ecpglib.h>\n#include <ecpgerrno.h>\n#include <sqlca.h>\n");
+					fprintf(base_yyout, "/* These include files are added by the preprocessor */\n#include <ecpglib.h>\n#include <ecpgerrno.h>\n#include <sqlca.h>\n");
 
 					/* add some compatibility headers */
 					if (INFORMIX_MODE)
-						fprintf(yyout, "/* Needed for informix compatibility */\n#include <ecpg_informix.h>\n");
+						fprintf(base_yyout, "/* Needed for informix compatibility */\n#include <ecpg_informix.h>\n");
 
-					fprintf(yyout, "/* End of automatic include section */\n");
+					fprintf(base_yyout, "/* End of automatic include section */\n");
 				}
 
 				if (regression_mode)
-					fprintf(yyout, "#define ECPGdebug(X,Y) ECPGdebug((X)+100,(Y))\n");
+					fprintf(base_yyout, "#define ECPGdebug(X,Y) ECPGdebug((X)+100,(Y))\n");
 
 				output_line_number();
 
@@ -454,10 +454,10 @@ main(int argc, char *const argv[])
 					if (!(ptr->opened))
 						mmerror(PARSE_ERROR, ET_WARNING, "cursor \"%s\" has been declared but not opened", ptr->name);
 
-				if (yyin != NULL && yyin != stdin)
-					fclose(yyin);
-				if (out_option == 0 && yyout != stdout)
-					fclose(yyout);
+				if (base_yyin != NULL && base_yyin != stdin)
+					fclose(base_yyin);
+				if (out_option == 0 && base_yyout != stdout)
+					fclose(base_yyout);
 
 				/*
 				 * If there was an error, delete the output file.
diff --git a/src/interfaces/ecpg/preproc/ecpg.header b/src/interfaces/ecpg/preproc/ecpg.header
index 75538e3bd9..6f08aeb3b7 100644
--- a/src/interfaces/ecpg/preproc/ecpg.header
+++ b/src/interfaces/ecpg/preproc/ecpg.header
@@ -72,7 +72,7 @@ mmerror(int error_code, enum errortype type, const char *error, ...)
 	/* internationalize the error message string */
 	error = _(error);
 
-	fprintf(stderr, "%s:%d: ", input_filename, yylineno);
+	fprintf(stderr, "%s:%d: ", input_filename, base_yylineno);
 
 	switch(type)
 	{
@@ -99,10 +99,10 @@ mmerror(int error_code, enum errortype type, const char *error, ...)
 			ret_value = error_code;
 			break;
 		case ET_FATAL:
-			if (yyin)
-				fclose(yyin);
-			if (yyout)
-				fclose(yyout);
+			if (base_yyin)
+				fclose(base_yyin);
+			if (base_yyout)
+				fclose(base_yyout);
 
 			if (strcmp(output_filename, "-") != 0 && unlink(output_filename) != 0)
 				fprintf(stderr, _("could not remove output file \"%s\"\n"), output_filename);
@@ -178,7 +178,7 @@ make3_str(char *str1, char *str2, char *str3)
 static char *
 make_name(void)
 {
-	return mm_strdup(yytext);
+	return mm_strdup(base_yytext);
 }
 
 static char *
diff --git a/src/interfaces/ecpg/preproc/ecpg.trailer b/src/interfaces/ecpg/preproc/ecpg.trailer
index 8ed2eb4861..42c2f3901e 100644
--- a/src/interfaces/ecpg/preproc/ecpg.trailer
+++ b/src/interfaces/ecpg/preproc/ecpg.trailer
@@ -8,14 +8,14 @@ statement: ecpgstart at stmt ';' { connection = NULL; }
 				| ecpgstart stmt ';'
 				| ecpgstart ECPGVarDeclaration
 				{
-					fprintf(yyout, "%s", $2);
+					fprintf(base_yyout, "%s", $2);
 					free($2);
 					output_line_number();
 				}
 				| ECPGDeclaration
-				| c_thing               { fprintf(yyout, "%s", $1); free($1); }
-				| CPP_LINE              { fprintf(yyout, "%s", $1); free($1); }
-				| '{'                   { braces_open++; fputs("{", yyout); }
+				| c_thing               { fprintf(base_yyout, "%s", $1); free($1); }
+				| CPP_LINE              { fprintf(base_yyout, "%s", $1); free($1); }
+				| '{'                   { braces_open++; fputs("{", base_yyout); }
 				| '}'
 		{
 			remove_typedefs(braces_open);
@@ -25,7 +25,7 @@ statement: ecpgstart at stmt ';' { connection = NULL; }
 				free(current_function);
 				current_function = NULL;
 			}
-			fputs("}", yyout);
+			fputs("}", base_yyout);
 		}
 		;
 
@@ -380,10 +380,10 @@ ecpg_interval:	opt_interval	{ $$ = $1; }
  * variable declaration inside exec sql declare block
  */
 ECPGDeclaration: sql_startdeclare
-		{ fputs("/* exec sql begin declare section */", yyout); }
+		{ fputs("/* exec sql begin declare section */", base_yyout); }
 		var_type_declarations sql_enddeclare
 		{
-			fprintf(yyout, "%s/* exec sql end declare section */", $3);
+			fprintf(base_yyout, "%s/* exec sql end declare section */", $3);
 			free($3);
 			output_line_number();
 		}
@@ -417,7 +417,7 @@ type_declaration: S_TYPEDEF
 	{
 		add_typedef($5, $6.index1, $6.index2, $3.type_enum, $3.type_dimension, $3.type_index, initializer, *$4 ? 1 : 0);
 
-		fprintf(yyout, "typedef %s %s %s %s;\n", $3.type_str, *$4 ? "*" : "", $5, $6.str);
+		fprintf(base_yyout, "typedef %s %s %s %s;\n", $3.type_str, *$4 ? "*" : "", $5, $6.str);
 		output_line_number();
 		$$ = mm_strdup("");
 	};
@@ -1905,7 +1905,7 @@ void base_yyerror(const char *error)
 {
 	/* translator: %s is typically the translation of "syntax error" */
 	mmerror(PARSE_ERROR, ET_ERROR, "%s at or near \"%s\"",
-			_(error), token_start ? token_start : yytext);
+			_(error), token_start ? token_start : base_yytext);
 }
 
 void parser_init(void)
diff --git a/src/interfaces/ecpg/preproc/extern.h b/src/interfaces/ecpg/preproc/extern.h
index ccf5548f57..04af864aa1 100644
--- a/src/interfaces/ecpg/preproc/extern.h
+++ b/src/interfaces/ecpg/preproc/extern.h
@@ -34,15 +34,15 @@ extern char *descriptor_index;
 extern char *descriptor_name;
 extern char *connection;
 extern char *input_filename;
-extern char *yytext,
+extern char *base_yytext,
 		   *token_start;
 
 #ifdef YYDEBUG
-extern int	yydebug;
+extern int	base_yydebug;
 #endif
-extern int	yylineno;
-extern FILE *yyin,
-		   *yyout;
+extern int	base_yylineno;
+extern FILE *base_yyin,
+		   *base_yyout;
 extern char *output_filename;
 
 extern struct _include_path *include_paths;
diff --git a/src/interfaces/ecpg/preproc/output.c b/src/interfaces/ecpg/preproc/output.c
index 007c07c034..fffcda7cde 100644
--- a/src/interfaces/ecpg/preproc/output.c
+++ b/src/interfaces/ecpg/preproc/output.c
@@ -11,7 +11,7 @@ output_line_number(void)
 {
 	char	   *line = hashline_number();
 
-	fprintf(yyout, "%s", line);
+	fprintf(base_yyout, "%s", line);
 	free(line);
 }
 
@@ -37,22 +37,22 @@ print_action(struct when * w)
 	switch (w->code)
 	{
 		case W_SQLPRINT:
-			fprintf(yyout, "sqlprint();");
+			fprintf(base_yyout, "sqlprint();");
 			break;
 		case W_GOTO:
-			fprintf(yyout, "goto %s;", w->command);
+			fprintf(base_yyout, "goto %s;", w->command);
 			break;
 		case W_DO:
-			fprintf(yyout, "%s;", w->command);
+			fprintf(base_yyout, "%s;", w->command);
 			break;
 		case W_STOP:
-			fprintf(yyout, "exit (1);");
+			fprintf(base_yyout, "exit (1);");
 			break;
 		case W_BREAK:
-			fprintf(yyout, "break;");
+			fprintf(base_yyout, "break;");
 			break;
 		default:
-			fprintf(yyout, "{/* %d not implemented yet */}", w->code);
+			fprintf(base_yyout, "{/* %d not implemented yet */}", w->code);
 			break;
 	}
 }
@@ -63,24 +63,24 @@ whenever_action(int mode)
 	if ((mode & 1) == 1 && when_nf.code != W_NOTHING)
 	{
 		output_line_number();
-		fprintf(yyout, "\nif (sqlca.sqlcode == ECPG_NOT_FOUND) ");
+		fprintf(base_yyout, "\nif (sqlca.sqlcode == ECPG_NOT_FOUND) ");
 		print_action(&when_nf);
 	}
 	if (when_warn.code != W_NOTHING)
 	{
 		output_line_number();
-		fprintf(yyout, "\nif (sqlca.sqlwarn[0] == 'W') ");
+		fprintf(base_yyout, "\nif (sqlca.sqlwarn[0] == 'W') ");
 		print_action(&when_warn);
 	}
 	if (when_error.code != W_NOTHING)
 	{
 		output_line_number();
-		fprintf(yyout, "\nif (sqlca.sqlcode < 0) ");
+		fprintf(base_yyout, "\nif (sqlca.sqlcode < 0) ");
 		print_action(&when_error);
 	}
 
 	if ((mode & 2) == 2)
-		fputc('}', yyout);
+		fputc('}', base_yyout);
 
 	output_line_number();
 }
@@ -91,7 +91,7 @@ hashline_number(void)
 	/* do not print line numbers if we are in debug mode */
 	if (input_filename
 #ifdef YYDEBUG
-		&& !yydebug
+		&& !base_yydebug
 #endif
 		)
 	{
@@ -100,7 +100,7 @@ hashline_number(void)
 		char	   *src,
 				   *dest;
 
-		sprintf(line, "\n#line %d \"", yylineno);
+		sprintf(line, "\n#line %d \"", base_yylineno);
 		src = input_filename;
 		dest = line + strlen(line);
 		while (*src)
@@ -128,27 +128,27 @@ static char *ecpg_statement_type_name[] = {
 void
 output_statement(char *stmt, int whenever_mode, enum ECPG_statement_type st)
 {
-	fprintf(yyout, "{ ECPGdo(__LINE__, %d, %d, %s, %d, ", compat, force_indicator, connection ? connection : "NULL", questionmarks);
+	fprintf(base_yyout, "{ ECPGdo(__LINE__, %d, %d, %s, %d, ", compat, force_indicator, connection ? connection : "NULL", questionmarks);
 	if (st == ECPGst_execute || st == ECPGst_exec_immediate)
 	{
-		fprintf(yyout, "%s, %s, ", ecpg_statement_type_name[st], stmt);
+		fprintf(base_yyout, "%s, %s, ", ecpg_statement_type_name[st], stmt);
 	}
 	else
 	{
 		if (st == ECPGst_prepnormal && auto_prepare)
-			fputs("ECPGst_prepnormal, \"", yyout);
+			fputs("ECPGst_prepnormal, \"", base_yyout);
 		else
-			fputs("ECPGst_normal, \"", yyout);
+			fputs("ECPGst_normal, \"", base_yyout);
 
 		output_escaped_str(stmt, false);
-		fputs("\", ", yyout);
+		fputs("\", ", base_yyout);
 	}
 
 	/* dump variables to C file */
 	dump_variables(argsinsert, 1);
-	fputs("ECPGt_EOIT, ", yyout);
+	fputs("ECPGt_EOIT, ", base_yyout);
 	dump_variables(argsresult, 1);
-	fputs("ECPGt_EORT);", yyout);
+	fputs("ECPGt_EORT);", base_yyout);
 	reset_variables();
 
 	whenever_action(whenever_mode | 2);
@@ -160,11 +160,11 @@ output_statement(char *stmt, int whenever_mode, enum ECPG_statement_type st)
 void
 output_prepare_statement(char *name, char *stmt)
 {
-	fprintf(yyout, "{ ECPGprepare(__LINE__, %s, %d, ", connection ? connection : "NULL", questionmarks);
+	fprintf(base_yyout, "{ ECPGprepare(__LINE__, %s, %d, ", connection ? connection : "NULL", questionmarks);
 	output_escaped_str(name, true);
-	fputs(", ", yyout);
+	fputs(", ", base_yyout);
 	output_escaped_str(stmt, true);
-	fputs(");", yyout);
+	fputs(");", base_yyout);
 	whenever_action(2);
 	free(name);
 	if (connection != NULL)
@@ -178,12 +178,12 @@ output_deallocate_prepare_statement(char *name)
 
 	if (strcmp(name, "all") != 0)
 	{
-		fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, ", compat, con);
+		fprintf(base_yyout, "{ ECPGdeallocate(__LINE__, %d, %s, ", compat, con);
 		output_escaped_str(name, true);
-		fputs(");", yyout);
+		fputs(");", base_yyout);
 	}
 	else
-		fprintf(yyout, "{ ECPGdeallocate_all(__LINE__, %d, %s);", compat, con);
+		fprintf(base_yyout, "{ ECPGdeallocate_all(__LINE__, %d, %s);", compat, con);
 
 	whenever_action(2);
 	free(name);
@@ -203,16 +203,16 @@ output_escaped_str(char *str, bool quoted)
 	{
 		i = 1;
 		len--;
-		fputs("\"", yyout);
+		fputs("\"", base_yyout);
 	}
 
 	/* output this char by char as we have to filter " and \n */
 	for (; i < len; i++)
 	{
 		if (str[i] == '"')
-			fputs("\\\"", yyout);
+			fputs("\\\"", base_yyout);
 		else if (str[i] == '\n')
-			fputs("\\\n", yyout);
+			fputs("\\\n", base_yyout);
 		else if (str[i] == '\\')
 		{
 			int			j = i;
@@ -230,17 +230,17 @@ output_escaped_str(char *str, bool quoted)
 
 			if ((str[j] != '\n') && (str[j] != '\r' || str[j + 1] != '\n'))		/* not followed by a
 																				 * newline */
-				fputs("\\\\", yyout);
+				fputs("\\\\", base_yyout);
 		}
 		else if (str[i] == '\r' && str[i + 1] == '\n')
 		{
-			fputs("\\\r\n", yyout);
+			fputs("\\\r\n", base_yyout);
 			i++;
 		}
 		else
-			fputc(str[i], yyout);
+			fputc(str[i], base_yyout);
 	}
 
 	if (quoted && str[0] == '\"' && str[len] == '\"')
-		fputs("\"", yyout);
+		fputs("\"", base_yyout);
 }
diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index c8455b88d8..a0a2d4a003 100644
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -24,19 +24,10 @@
 
 #include "extern.h"
 #include "preproc.h"
-
-/*
- * Change symbol names as expected by preproc.y.  It'd be better to do this
- * with %option prefix="base_yy", but that affects some other names that
- * various files expect *not* to be prefixed with "base_".  Cleaning it up
- * is not worth the trouble right now.
- */
-#define yylex           base_yylex
-#define yylval          base_yylval
 }
 
 %{
-extern YYSTYPE yylval;
+extern YYSTYPE base_yylval;
 
 static int		xcdepth = 0;	/* depth of nesting in slash-star comments */
 static char	   *dolqstart = NULL;	/* current $foo$ quote start string */
@@ -97,6 +88,7 @@ static struct _if_value
 %option noinput
 %option noyywrap
 %option warn
+%option prefix="base_yy"
 
 %option yylineno
 
@@ -426,7 +418,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 					BEGIN(SQL);
 					if (literalbuf[strspn(literalbuf, "01") + 1] != '\0')
 						mmerror(PARSE_ERROR, ET_ERROR, "invalid bit string literal");
-					yylval.str = mm_strdup(literalbuf);
+					base_yylval.str = mm_strdup(literalbuf);
 					return BCONST;
 				}
 
@@ -446,7 +438,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 <xh>{quotefail}	{
 				yyless(1);
 				BEGIN(SQL);
-				yylval.str = mm_strdup(literalbuf);
+				base_yylval.str = mm_strdup(literalbuf);
 				return XCONST;
 			}
 
@@ -489,27 +481,27 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 <xq,xqc>{quotefail} {
 				yyless(1);
 				BEGIN(state_before);
-				yylval.str = mm_strdup(literalbuf);
+				base_yylval.str = mm_strdup(literalbuf);
 				return SCONST;
 			}
 <xe>{quotestop} |
 <xe>{quotefail} {
 				yyless(1);
 				BEGIN(state_before);
-				yylval.str = mm_strdup(literalbuf);
+				base_yylval.str = mm_strdup(literalbuf);
 				return ECONST;
 			}
 <xn>{quotestop} |
 <xn>{quotefail} {
 				yyless(1);
 				BEGIN(state_before);
-				yylval.str = mm_strdup(literalbuf);
+				base_yylval.str = mm_strdup(literalbuf);
 				return NCONST;
 			}
 <xus>{xusstop} {
 				addlit(yytext, yyleng);
 				BEGIN(state_before);
-				yylval.str = mm_strdup(literalbuf);
+				base_yylval.str = mm_strdup(literalbuf);
 				return UCONST;
 			}
 <xq,xe,xn,xus>{xqdouble}	{ addlitchar('\''); }
@@ -550,7 +542,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 					addlit(yytext, yyleng);
 					free(dolqstart);
 					BEGIN(SQL);
-					yylval.str = mm_strdup(literalbuf);
+					base_yylval.str = mm_strdup(literalbuf);
 					return DOLCONST;
 				}
 				else
@@ -587,12 +579,12 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 						if (literallen == 0)
 							mmerror(PARSE_ERROR, ET_ERROR, "zero-length delimited identifier");
 						/* The backend will truncate the identifier here. We do not as it does not change the result. */
-						yylval.str = mm_strdup(literalbuf);
+						base_yylval.str = mm_strdup(literalbuf);
 						return CSTRING;
 					}
 <xdc>{xdstop}		{
 						BEGIN(state_before);
-						yylval.str = mm_strdup(literalbuf);
+						base_yylval.str = mm_strdup(literalbuf);
 						return CSTRING;
 					}
 <xui>{xuistop}		{
@@ -601,7 +593,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 							mmerror(PARSE_ERROR, ET_ERROR, "zero-length delimited identifier");
 						/* The backend will truncate the identifier here. We do not as it does not change the result. */
 						addlit(yytext, yyleng);
-						yylval.str = mm_strdup(literalbuf);
+						base_yylval.str = mm_strdup(literalbuf);
 						return UIDENT;
 					}
 <xd,xui>{xddouble}		{ addlitchar('"'); }
@@ -697,13 +689,13 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 
 						/* Convert "!=" operator to "<>" for compatibility */
 						if (strcmp(yytext, "!=") == 0)
-							yylval.str = mm_strdup("<>");
+							base_yylval.str = mm_strdup("<>");
 						else
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 						return Op;
 					}
 <SQL>{param}		{
-						yylval.ival = atol(yytext+1);
+						base_yylval.ival = atol(yytext+1);
 						return PARAM;
 					}
 <C,SQL>{integer}	{
@@ -720,36 +712,36 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 							)
 						{
 							errno = 0;
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 							return FCONST;
 						}
-						yylval.ival = val;
+						base_yylval.ival = val;
 						return ICONST;
 					}
 <SQL>{ip}			{
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return IP;
 				}
 <C,SQL>{decimal}	{
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return FCONST;
 			}
 <C,SQL>{real}		{
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return FCONST;
 			}
 <SQL>{realfail1}	{
 						yyless(yyleng-1);
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return FCONST;
 					}
 <SQL>{realfail2}	{
 						yyless(yyleng-2);
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return FCONST;
 					}
 <SQL>:{identifier}((("->"|\.){identifier})|(\[{array}\]))*	{
-						yylval.str = mm_strdup(yytext+1);
+						base_yylval.str = mm_strdup(yytext+1);
 						return(CVARIABLE);
 					}
 <SQL>{identifier}	{
@@ -775,7 +767,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 							 * to do so; that's just another way that ecpg could get
 							 * out of step with the backend.
 							 */
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 							return IDENT;
 						}
 					}
@@ -796,11 +788,11 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 						char* endptr;
 
 						errno = 0;
-						yylval.ival = strtoul((char *)yytext,&endptr,16);
+						base_yylval.ival = strtoul((char *)yytext,&endptr,16);
 						if (*endptr != '\0' || errno == ERANGE)
 						{
 							errno = 0;
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 							return SCONST;
 						}
 						return ICONST;
@@ -813,7 +805,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 						}
 						else
 						{
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 							return(CPP_LINE);
 						}
 					}
@@ -825,12 +817,12 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 						}
 						else
 						{
-							yylval.str = mm_strdup(yytext);
+							base_yylval.str = mm_strdup(yytext);
 							return(CPP_LINE);
 						}
 					}
 <C,SQL>{cppline}	{
-						yylval.str = mm_strdup(yytext);
+						base_yylval.str = mm_strdup(yytext);
 						return(CPP_LINE);
 					}
 <C>{identifier}		{
@@ -855,7 +847,7 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 								return keyword->value;
 							else
 							{
-								yylval.str = mm_strdup(yytext);
+								base_yylval.str = mm_strdup(yytext);
 								return IDENT;
 							}
 						}
diff --git a/src/interfaces/ecpg/preproc/variable.c b/src/interfaces/ecpg/preproc/variable.c
index 1b181b9dd4..8e66e4122b 100644
--- a/src/interfaces/ecpg/preproc/variable.c
+++ b/src/interfaces/ecpg/preproc/variable.c
@@ -452,7 +452,7 @@ dump_variables(struct arguments * list, int mode)
 	dump_variables(list->next, mode);
 
 	/* Then the current element and its indicator */
-	ECPGdump_a_type(yyout, list->variable->name, list->variable->type, list->variable->brace_level,
+	ECPGdump_a_type(base_yyout, list->variable->name, list->variable->type, list->variable->brace_level,
 					list->indicator->name, list->indicator->type, list->indicator->brace_level,
 					NULL, NULL, str_zero, NULL, NULL);