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From: JRR <juergen.reuter@HIDDEN>
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Hi all,
it seems that the setup in
lines 1065-1083 in m4/libtool.m4
(cf. below) do not work for macOS Big Sur because they changed the major 
development version
of the macOS. When I am linking my programs, I need
-Wl,-undefined, -Wl,-dynamic_lookup
but I end up with
-Wl,-flat_namespace -Wl,-suppress
When I run my own configure with
MACOSX_DEPLOYMOMENT_TARGET='10.16' everything works again.
I provided a potential patch below, with two changes, the first assumes
the MACOSX_DEPLOYMENT_TARGET that libtool seems to default to,
namely 10.0, where now we have to take care of the fact that macOS
changed from darwin19.x -> darwin20.1
The second change accounts for a correct setting if someone sets
MACOSX_DEPLOYMENT_TARGET='11.0'
Probably someone else has already reported that issue.
Cheers,
     JRR (Juergen Reuter)

$ git diff
diff --git a/m4/libtool.m4 b/m4/libtool.m4
index f2d1f398..be9d50f3 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1072,11 +1072,11 @@ _LT_EOF
        # 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]]*)
+    10.0,*86*-darwin8*|10.0,*-darwin[[912]]*)
        _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
      10.[[012]][[,.]]*)
        _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined 
${wl}suppress' ;;
-    10.*)
+    10.*|11.*)
        _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
        esac
      ;;





-- 
--
---------------------------------
Juergen Reuter
DESY Theory Group, Bldg. 2a
Notkestr. 85
22607 Hamburg, GERMANY
Tel +49 (0)40 8998 3895
Fax +49 (0)40 8998 2777
skype: jr_reuter
---------------------------------

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: JRR <juergen.reuter@HIDDEN>
Subject: bug#44684: Acknowledgement (libtool.m4 linker flag selection does
 not work for macOS Big Sur)
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Date: Mon, 16 Nov 2020 13:52:01 +0000

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Duplicate of #44605.

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On 11/16/20, Ryan Schmidt <libtool@HIDDEN> wrote:
> Duplicate of #44605.

Be that as it may, but this #44684 has, as it seems, a sensible
patch.  Shall no one review it?

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The fix proposed here is undesirable because the same problem will =
happen again next year when Apple releases macOS 12.

I suggest using the fix I proposed in #44605 instead.

Message sent to bug-libtool@HIDDEN:


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Subject: bug#44684: libtool.m4 linker flag selection does not work for macOS Big Sur
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On 1/8/21, Ryan Schmidt <libtool@HIDDEN> wrote:
> The fix proposed here is undesirable because the same problem will happen
> again next year when Apple releases macOS 12.
>
> I suggest using the fix I proposed in #44605 instead.

Is there an agreed-upon and final version of a patch from #44605?
Last modified: Fri, 8 Jan 2021 17:15:01 UTC

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