commit 75040c3388d9a7dd5ad2bee53cbcc8bf3d35cd17
Author: Honza Horak <hhorak@redhat.com>
Date:   Fri Oct 30 20:16:50 2020 +0100

    The libpq package is supposed to be used for all the PostgreSQL modules
    available in RHEL 8, and ABI versioning will guarantee us that modular RPMs will
    depend on appropriate libpq ABI version (picked at build-time).

diff --git a/config/Makefile b/config/Makefile
index 67e7998..86612a4 100644
--- a/config/Makefile
+++ b/config/Makefile
@@ -8,6 +8,7 @@ include $(top_builddir)/src/Makefile.global
 install: all installdirs
 	$(INSTALL_SCRIPT) $(srcdir)/install-sh '$(DESTDIR)$(pgxsdir)/config/install-sh'
 	$(INSTALL_SCRIPT) $(srcdir)/missing '$(DESTDIR)$(pgxsdir)/config/missing'
+	$(INSTALL_SCRIPT) $(srcdir)/build-exports-gnu-ld '$(DESTDIR)$(pgxsdir)/config/build-exports-gnu-ld'
 
 installdirs:
 	$(MKDIR_P) '$(DESTDIR)$(pgxsdir)/config'
diff --git a/config/build-exports-gnu-ld b/config/build-exports-gnu-ld
new file mode 100755
index 0000000000..84c48e3ade
--- /dev/null
+++ b/config/build-exports-gnu-ld
@@ -0,0 +1,41 @@
+#! /bin/sh
+
+# by default use PG_ prefix
+: "${SYMBOL_VERSION_PREFIX=PG_}"
+
+# we started symbol versioning since v10
+: "${SYMBOL_VERSION_START=9.6}"
+
+version=$SYMBOL_VERSION_START
+version_prev=
+first=:
+
+open_block ()
+{
+	$first || echo
+	first=false
+	echo "${SYMBOL_VERSION_PREFIX}$version {"
+	echo "global:"
+}
+
+close_block ()
+{
+	echo "}${version_prev:+ $SYMBOL_VERSION_PREFIX$version_prev};"
+	version_prev=$version
+	version=$1
+}
+
+open_block
+while read -r symbol _ new_version
+do
+	case $symbol in '#'*) continue ;; esac
+	if test -n "$new_version" && test "$new_version" != "$version"; then
+		close_block "$new_version"
+		open_block
+	fi
+	echo "	$symbol;"
+done
+
+echo "local:"
+echo "	*;"
+close_block
diff --git a/src/Makefile.shlib b/src/Makefile.shlib
index 373d73caef..d5bd5468cd 100644
--- a/src/Makefile.shlib
+++ b/src/Makefile.shlib
@@ -231,7 +231,7 @@ ifeq ($(PORTNAME), linux)
   ifdef soname
     LINK.shared		+= -Wl,-soname,$(soname)
   endif
-  BUILD.exports		= ( echo '{ global:'; $(AWK) '/^[^\#]/ {printf "%s;\n",$$1}' $<; echo ' local: *; };' ) >$@
+  BUILD.exports		= $(SHELL) $(top_srcdir)/config/build-exports-gnu-ld < $< > $@
   exports_file		= $(SHLIB_EXPORTS:%.txt=%.list)
   ifneq (,$(exports_file))
     LINK.shared		+= -Wl,--version-script=$(exports_file)
diff --git a/src/interfaces/libpq/exports.txt b/src/interfaces/libpq/exports.txt
index bbc1f90..fc3ef8a 100644
--- a/src/interfaces/libpq/exports.txt
+++ b/src/interfaces/libpq/exports.txt
@@ -171,11 +171,11 @@ PQsslAttributeNames       168
 PQsslAttribute            169
 PQsetErrorContextVisibility 170
 PQresultVerboseErrorMessage 171
-PQencryptPasswordConn     172
+PQencryptPasswordConn     172     10
-PQresultMemorySize        173
+PQresultMemorySize        173     12
 PQhostaddr                174
 PQgssEncInUse             175
 PQgetgssctx               176
-PQsetSSLKeyPassHook_OpenSSL         177
+PQsetSSLKeyPassHook_OpenSSL         177     13
 PQgetSSLKeyPassHook_OpenSSL         178
 PQdefaultSSLKeyPassHook_OpenSSL     179
