From 65c0203bac3abf127a5900f1a0025b7a62a52d70 Mon Sep 17 00:00:00 2001
From: John Naylor <john.naylor@postgresql.org>
Date: Thu, 11 Aug 2022 19:38:37 +0700
Subject: [PATCH v4 03/11] Build guc-file.c standalone

The proposed Meson build system will need a way to ignore certain
generated files in order to coexist with the autoconf build system,
and #include'd C files generated by Flex make this more difficult.
Build guc-file.c separately from guc.c, as was done in 72b1e3a21.

Reviewed by Andres Freund
Discussion: https://www.postgresql.org/message-id/20220810171935.7k5zgnjwqzalzmtm%40awork3.anarazel.de
---
 src/backend/utils/misc/Makefile   | 5 +----
 src/backend/utils/misc/guc-file.l | 9 +++++----
 src/backend/utils/misc/guc.c      | 2 --
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile
index 1d5327cf64..cf7ce9bc83 100644
--- a/src/backend/utils/misc/Makefile
+++ b/src/backend/utils/misc/Makefile
@@ -16,6 +16,7 @@ override CPPFLAGS := -I. -I$(srcdir) $(CPPFLAGS)
 
 OBJS = \
 	guc.o \
+	guc-file.o \
 	help_config.o \
 	pg_config.o \
 	pg_controldata.o \
@@ -37,10 +38,6 @@ endif
 
 include $(top_srcdir)/src/backend/common.mk
 
-# guc-file is compiled as part of guc
-guc.o: guc-file.c
-
 # Note: guc-file.c is not deleted by 'make clean',
 # since we want to ship it in distribution tarballs.
 clean:
-	@rm -f lex.yy.c
diff --git a/src/backend/utils/misc/guc-file.l b/src/backend/utils/misc/guc-file.l
index 843838b1df..9aa3abe1ba 100644
--- a/src/backend/utils/misc/guc-file.l
+++ b/src/backend/utils/misc/guc-file.l
@@ -1,4 +1,4 @@
-/* -*-pgsql-c-*- */
+%top{
 /*
  * Scanner for the configuration file
  *
@@ -7,8 +7,6 @@
  * src/backend/utils/misc/guc-file.l
  */
 
-%{
-
 #include "postgres.h"
 
 #include <ctype.h>
@@ -17,10 +15,13 @@
 #include "mb/pg_wchar.h"
 #include "miscadmin.h"
 #include "storage/fd.h"
+#include <sys/stat.h>
 #include "utils/guc.h"
 #include "utils/guc_internal.h"
+#include "utils/memutils.h"
+}
 
-
+%{
 /*
  * flex emits a yy_fatal_error() function that it calls in response to
  * critical errors like malloc failure, file I/O errors, and detection of
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 293834fc13..92b5b18c8f 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -13333,5 +13333,3 @@ check_default_with_oids(bool *newval, void **extra, GucSource source)
 
 	return true;
 }
-
-#include "guc-file.c"
-- 
2.36.1