From 86ec753e258edb7755be7cb827e09b7fb9763827 Mon Sep 17 00:00:00 2001
From: Ned Deily <nad@python.org>
Date: Tue, 6 Sep 2016 15:09:20 -0700
Subject: [PATCH 02/16] Issue #21122: Fix LTO builds on OS X. Patch by Brett
 Cannon.

---
 configure    | 13 ++++++++++---
 configure.ac | 13 ++++++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index 5640c2dc12..191425c1b8 100755
--- a/configure
+++ b/configure
@@ -6582,13 +6582,20 @@ fi
 if test "$Py_LTO" = 'true' ; then
   case $CC in
     *clang*)
-      # Any changes made here should be reflected in the GCC+Darwin case below
-      LTOFLAGS="-flto"
+      case $ac_sys_system in
+        Darwin*)
+          # Any changes made here should be reflected in the GCC+Darwin case below
+          LTOFLAGS="-flto -Wl,-export_dynamic"
+          ;;
+        *)
+          LTOFLAGS="-flto"
+          ;;
+      esac
       ;;
     *gcc*)
       case $ac_sys_system in
         Darwin*)
-          LTOFLAGS="-flto"
+          LTOFLAGS="-flto -Wl,-export_dynamic"
           ;;
         *)
           LTOFLAGS="-flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none"
diff --git a/configure.ac b/configure.ac
index c9b755f0f4..4d7ed101a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1268,13 +1268,20 @@ fi],
 if test "$Py_LTO" = 'true' ; then
   case $CC in
     *clang*)
-      # Any changes made here should be reflected in the GCC+Darwin case below
-      LTOFLAGS="-flto"
+      case $ac_sys_system in
+        Darwin*)
+          # Any changes made here should be reflected in the GCC+Darwin case below
+          LTOFLAGS="-flto -Wl,-export_dynamic"
+          ;;
+        *)
+          LTOFLAGS="-flto"
+          ;;
+      esac
       ;;
     *gcc*)
       case $ac_sys_system in
         Darwin*)
-          LTOFLAGS="-flto"
+          LTOFLAGS="-flto -Wl,-export_dynamic"
           ;;
         *)
           LTOFLAGS="-flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none"
-- 
2.14.3 (Apple Git-98)