GNU bug report logs - #43878
emacs fails to build on recent macOS 11.0 ARM betas

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From: Itai Seggev <is+apple <at> cs.hmc.edu>
To: Alan Third <alan <at> idiocy.org>, Lars Ingebrigtsen <larsi <at> gnus.org>, 43878 <at> debbugs.gnu.org
Subject: bug#43878: patch for 43878
Date: Fri, 20 Nov 2020 14:19:09 -0600

On Wed, Nov 18, 2020 at 11:34:15PM +0000, Alan Third wrote:
> On Tue, Nov 17, 2020 at 12:36:10PM -0600, Itai Seggev wrote:
> > +ifeq ($(shell uname),Darwin)
> 
> Is $DARWIN_OS available in the Makefile?

Not as far as I can tell.  But here's a revised patch that is both more
targeted and only using autoconf variables:

diff --git a/src/Makefile.in b/src/Makefile.in
index c5fb2ea3ab..02d50bb7ca 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -336,6 +336,10 @@ DUMPING=
 CHECK_STRUCTS = @CHECK_STRUCTS@
 HAVE_PDUMPER = @HAVE_PDUMPER@
 
+## ARM Macs require that all code have a valid signature.  Since pump
+## invalidates the signature, we must re-sign to fix it.
+DO_CODESIGN=$(patsubst @configuration@,aarch64-apple-darwin%,yes)
+
 # 'make' verbosity.
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 
@@ -653,6 +657,9 @@ temacs$(EXEEXT):
 	  $(ALLOBJS) $(LIBEGNU_ARCHIVE) $(W32_RES_LINK) $(LIBES)
 ifeq ($(HAVE_PDUMPER),yes)
 	$(AM_V_at)$(MAKE_PDUMPER_FINGERPRINT) $@.tmp
+ifeq ($(DO_CODESIGN),yes)
+	codesign -s - -f $@.tmp
+endif
 endif
 	$(AM_V_at)mv $@.tmp $@
 	$(MKDIR_P) $(etc)


--
Itai

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