bug#52455: 28.0.90; on macOS High Sierra, Version 10.13.6, and macOS Monterey, Version 12.0.1, unexec fails

[Peter Dyballa]

Hello!

Configuring GNU Emacs 28.0.90 on both Macs à la

        env LANG=C 
PATH=/usr/bin:/opt/local/bin:/bin:/usr/local/texlive/2021/bin/universal-darwin:/usr/local/gnupg-2.2/bin:/usr/local/bin:/sbin:/usr/sbin:/opt/local/sbin:/usr/local/sbin:/opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin:/opt/X11/bin
 ./configure --without-libsystemd --without-pop --without-sound --without-gpm 
--without-dbus --without-selinux --without-imagemagick --without-ns --with-x 
--with-dumping=unexec --disable-ns-self-contained --with-x-toolkit=athena 
--x-libraries=/opt/X11/lib --x-includes=/opt/local/include 
--enable-locallisppath=/Library/Application\ 
Support/Emacs/calendar28:/Library/Application\ Support/Emacs 
--with-file-notification=yes CPPFLAGS=-I/opt/local/include CFLAGS="-g -H -pipe 
-fPIC -fno-common -Os -arch x86_64 -fomit-frame-pointer" LDFLAGS="-v -arch 
x86_64 -Wl,-bind_at_load -Wl,-t -L /opt/local/lib" 
PKG_CONFIG_PATH=/opt/local/libexec/openssl3/lib/pkgconfig:/opt/local/lib/pkgconfig:/opt/local/share/pkgconfig:/opt/X11/lib/pkgconfig:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig
 CC=clang CXX=clang++

or

        env LANG=C 
PATH=/usr/bin:/opt/local/bin:/bin:/usr/local/texlive/2021/bin/universal-darwin:/usr/local/gnupg-2.2/bin:/usr/local/bin:/sbin:/usr/sbin:/opt/local/sbin:/usr/local/sbin:/opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin:/opt/X11/bin
 ./configure --without-libsystemd --without-pop --without-sound --without-gpm 
--without-dbus --without-selinux --without-imagemagick --with-ns 
--with-dumping=unexec --disable-ns-self-contained --with-x-toolkit=athena 
--x-libraries=/opt/X11/lib --x-includes=/opt/local/include 
--enable-locallisppath=/Library/Application\ 
Support/Emacs/calendar28:/Library/Application\ Support/Emacs 
--with-file-notification=yes CPPFLAGS=-I/opt/local/include CFLAGS="-g -H -pipe 
-fPIC -fno-common -Os -arch x86_64 -fomit-frame-pointer" LDFLAGS="-v -arch 
x86_64 -Wl,-bind_at_load -Wl,-t -L /opt/local/lib" 
PKG_CONFIG_PATH=/usr/lib/pkgconfig:/opt/local/libexec/openssl3/lib/pkgconfig:/opt/local/lib/pkgconfig:/opt/local/share/pkgconfig:/opt/X11/lib/pkgconfig
 CC=clang CXX=clang++

and setting CC or CXX also as gcc/g++ and rearranging PATH that Apple's/Xcode's 
Clang compiler is used, all compilations finish in a temacs crash à la:

        ./temacs --batch  -l loadup --temacs=bootstrap
        Loading loadup.el (source)...
        Dump mode: bootstrap
        Using load-path (/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/emacs-lisp 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/progmodes 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/language 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/international 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/textmodes 
/Users/pete/Quellen/Emacs_CVS/emacs-28.0.90/lisp/vc)
        Loading emacs-lisp/byte-run...
        Loading emacs-lisp/backquote...
        Loading subr...
        Loading version...
        Loading widget...
        Loading custom...
        Loading emacs-lisp/map-ynp...
        Loading international/mule...
        Loading international/mule-conf...
        temacs(39512,0x10fc71600) malloc: Non-aligned pointer 0x1078175f8 being 
freed
        temacs(39512,0x10fc71600) malloc: *** set a breakpoint in 
malloc_error_break to debug
        gmake[1]: *** [Makefile:852: bootstrap-emacs] Abort trap: 6

On macOS Monterey only Apple's/Xcode Clang 13 is available (GCC10 and GCC11 are 
not yet prepared), on macOS High Sierra MacPorts compiled GCC9, GCC10 and GCC11 
as well as Clang 11 and 13 + Apple's/Xcode's Clang 10 are available. All these 
compilers fail building src/emacs when configured --with-dumping=unexec – and I 
need to different methods of dumping when I want to used X11 version and the NS 
variant with --disable-ns-self-contained.

Retrying with LDFLAGS="-v -arch x86_64 -Wl,-t -L /opt/local/lib" makes no 
difference.

--
Greetings

  Pete

Remember, "Advance too fast, you catch up with death. But advance too slow, 
death catches up with *you*."