libtool: support macOS 11

Fixes bug#44605

* m4/libtool.m4: '_LT_REQUIRED_DARWIN_CHECKS' sets proper "allow undefined" flag
for particular macOS versions and powerpc.

Copyright-paperwork-exempt: Yes

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 873ebb8bb8d2dd60310e9af88a375cbc86f1695e..8cc0d8dea48fe5f6554e885aee6d385aa1cc6d33 100644 (file)
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1069,17 +1069,12 @@ _LT_EOF
       _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
     darwin1.*)
       _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
-    darwin*) # darwin 5.x on
-      # if running on 10.5 or later, the deployment target defaults
-      # to the OS version, if on x86, and 10.4, the deployment
-      # target defaults to 10.4. Don't you love it?
-      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
-       10.0,*86*-darwin8*|10.0,*-darwin[[91]]*)
-         _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
-       10.[[012]][[,.]]*)
-         _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
-       10.*)
-         _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+    darwin*)
+      case ${MACOSX_DEPLOYMENT_TARGET},$host in
+        10.[[012]],*|,*powerpc*)
+          _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+        *)
+          _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
       esac
     ;;
   esac