From 47521693eda3066fc1569a2e8f53a8d33f50eeb5 Mon Sep 17 00:00:00 2001
From: Konstantin Knizhnik <knizhnik@garret.ru>
Date: Tue, 2 May 2023 22:28:21 +0300
Subject: [PATCH] Fix file_cache build warnings (#4118)

## Describe your changes

## Issue ticket number and link

## Checklist before requesting a review

- [ ] I have performed a self-review of my code.
- [ ] If it is a core feature, I have added thorough tests.
- [ ] Do we need to implement analytics? if so did you add the relevant
metrics to the dashboard?
- [ ] If this PR requires public announcement, mark it with
/release-notes label and add several sentences in this section.

## Checklist before merging

- [ ] Do not forget to reformat commit message to not include the above
checklist
---
 pgxn/neon/file_cache.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pgxn/neon/file_cache.c b/pgxn/neon/file_cache.c
index cc46fb5a25..1ab2ae668a 100644
--- a/pgxn/neon/file_cache.c
+++ b/pgxn/neon/file_cache.c
@@ -96,6 +96,8 @@ static shmem_request_hook_type prev_shmem_request_hook;
 #endif
 static int   lfc_shrinking_factor; /* power of two by which local cache size will be shrinked when lfc_free_space_watermark is reached */
 
+void FileCacheMonitorMain(Datum main_arg);
+
 static void
 lfc_shmem_startup(void)
 {
@@ -378,7 +380,6 @@ lfc_evict(RelFileNode rnode, ForkNumber forkNum, BlockNumber blkno)
 {
 	BufferTag tag;
 	FileCacheEntry* entry;
-	ssize_t rc;
 	bool found;
 	int chunk_offs = blkno & (BLOCKS_PER_CHUNK-1);
 	uint32 hash;