From 9fb855fe1ae04a147bd4cdaa571a1c9de5f03682 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Fri, 2 Aug 2024 09:59:35 +0200
Subject: [PATCH] Include bison header files into implementation files

Before Bison 3.4, the generated parser implementation files run afoul
of -Wmissing-variable-declarations (in spite of commit ab61c40bfa2)
because declarations for yylval and possibly yylloc are missing.  The
generated header files contain an extern declaration, but the
implementation files don't include the header files.  Since Bison 3.4,
the generated implementation files automatically include the generated
header files, so then it works.

To make this work with older Bison versions as well, include the
generated header file from the .y file.

(With older Bison versions, the generated implementation file contains
effectively a copy of the header file pasted in, so including the
header file is redundant.  But we know this works anyway because the
core grammar uses this arrangement already.)

Discussion: https://www.postgresql.org/message-id/flat/e0a62134-83da-4ba4-8cdb-ceb0111c95ce@eisentraut.org
---
 contrib/cube/cubeparse.y                | 8 +++++---
 contrib/seg/segparse.y                  | 1 +
 src/backend/bootstrap/bootparse.y       | 1 +
 src/backend/replication/repl_gram.y     | 1 +
 src/backend/replication/syncrep_gram.y  | 2 ++
 src/interfaces/ecpg/preproc/ecpg.header | 1 +
 src/pl/plpgsql/src/pl_gram.y            | 1 +
 src/test/isolation/specparse.y          | 1 +
 8 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/contrib/cube/cubeparse.y b/contrib/cube/cubeparse.y
index fd56d0e1628..52622875cbb 100644
--- a/contrib/cube/cubeparse.y
+++ b/contrib/cube/cubeparse.y
@@ -11,13 +11,15 @@
 #include "utils/float.h"
 #include "varatt.h"
 
+/* All grammar constructs return strings */
+#define YYSTYPE char *
+
+#include "cubeparse.h"
+
 /* silence -Wmissing-variable-declarations */
 extern int cube_yychar;
 extern int cube_yynerrs;
 
-/* All grammar constructs return strings */
-#define YYSTYPE char *
-
 /*
  * Bison doesn't allocate anything that needs to live across parser calls,
  * so we can easily have it use palloc instead of malloc.  This prevents
diff --git a/contrib/seg/segparse.y b/contrib/seg/segparse.y
index 9635c3af6e6..3e4aa31cada 100644
--- a/contrib/seg/segparse.y
+++ b/contrib/seg/segparse.y
@@ -12,6 +12,7 @@
 #include "utils/float.h"
 
 #include "segdata.h"
+#include "segparse.h"
 
 /* silence -Wmissing-variable-declarations */
 extern int seg_yychar;
diff --git a/src/backend/bootstrap/bootparse.y b/src/backend/bootstrap/bootparse.y
index 58e0878dc8d..73a7592fb71 100644
--- a/src/backend/bootstrap/bootparse.y
+++ b/src/backend/bootstrap/bootparse.y
@@ -32,6 +32,7 @@
 #include "nodes/makefuncs.h"
 #include "utils/memutils.h"
 
+#include "bootparse.h"
 
 /* silence -Wmissing-variable-declarations */
 extern int boot_yychar;
diff --git a/src/backend/replication/repl_gram.y b/src/backend/replication/repl_gram.y
index c46ca395263..06daa954813 100644
--- a/src/backend/replication/repl_gram.y
+++ b/src/backend/replication/repl_gram.y
@@ -22,6 +22,7 @@
 #include "replication/walsender.h"
 #include "replication/walsender_private.h"
 
+#include "repl_gram.h"
 
 /* silence -Wmissing-variable-declarations */
 extern int replication_yychar;
diff --git a/src/backend/replication/syncrep_gram.y b/src/backend/replication/syncrep_gram.y
index 5ce4f1bfe73..e4d9962226c 100644
--- a/src/backend/replication/syncrep_gram.y
+++ b/src/backend/replication/syncrep_gram.y
@@ -17,6 +17,8 @@
 #include "nodes/pg_list.h"
 #include "replication/syncrep.h"
 
+#include "syncrep_gram.h"
+
 /* Result of parsing is returned in one of these two variables */
 SyncRepConfigData *syncrep_parse_result;
 char	   *syncrep_parse_error_msg;
diff --git a/src/interfaces/ecpg/preproc/ecpg.header b/src/interfaces/ecpg/preproc/ecpg.header
index 571b92f6434..3790a601d1a 100644
--- a/src/interfaces/ecpg/preproc/ecpg.header
+++ b/src/interfaces/ecpg/preproc/ecpg.header
@@ -5,6 +5,7 @@
 #include "postgres_fe.h"
 
 #include "preproc_extern.h"
+#include "preproc.h"
 #include "ecpg_config.h"
 #include <unistd.h>
 
diff --git a/src/pl/plpgsql/src/pl_gram.y b/src/pl/plpgsql/src/pl_gram.y
index 0671ff78722..8182ce28aa1 100644
--- a/src/pl/plpgsql/src/pl_gram.y
+++ b/src/pl/plpgsql/src/pl_gram.y
@@ -26,6 +26,7 @@
 
 #include "plpgsql.h"
 
+#include "pl_gram.h"
 
 /* silence -Wmissing-variable-declarations */
 extern int plpgsql_yychar;
diff --git a/src/test/isolation/specparse.y b/src/test/isolation/specparse.y
index 282a7504556..788069d1ba5 100644
--- a/src/test/isolation/specparse.y
+++ b/src/test/isolation/specparse.y
@@ -13,6 +13,7 @@
 #include "postgres_fe.h"
 
 #include "isolationtester.h"
+#include "specparse.h"
 
 /* silence -Wmissing-variable-declarations */
 extern int spec_yychar;