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

diff --git a/src/pl/plperl/GNUmakefile b/src/pl/plperl/GNUmakefile
index 1ebf3c9ba2bb9a723f90963ad7dde6cb6b0735e6..51f8890d15d982811dafd12f099cc88658632b76 100644 (file)
--- 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 \