From 1c3aa54502dd7d2ced0c4e51de40aa4d61bfc04c Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Fri, 2 Sep 2022 17:56:14 +0200
Subject: [PATCH] Fix PL/Perl build on Cygwin

This was broken by b4e936859dc441102eb0b6fb7a104f3948c90490.  The
reason why this fixes it are not entirely clear, but it seemed the
best way to get it working again.

Discussion: https://www.postgresql.org/message-id/flat/8c4fcb72-2574-ff7c-4c25-1f032d4a2a57%40enterprisedb.com
---
 src/pl/plperl/GNUmakefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 1ebf3c9ba2b..51f8890d15d 100644
--- a/src/pl/plperl/GNUmakefile
+++ b/src/pl/plperl/GNUmakefile
@@ -55,6 +55,11 @@ endif # win32
 
 SHLIB_LINK = $(perl_embed_ldflags)
 
+# see https://www.postgresql.org/message-id/flat/8c4fcb72-2574-ff7c-4c25-1f032d4a2a57%40enterprisedb.com
+ifeq ($(PORTNAME), cygwin)
+SHLIB_LINK += -Wl,--export-all-symbols
+endif
+
 REGRESS_OPTS = --dbname=$(PL_TESTDB)
 REGRESS = plperl_setup plperl plperl_lc plperl_trigger plperl_shared \
 	plperl_elog plperl_util plperl_init plperlu plperl_array \