Re: [MacPorts] #70866: gcc14 doesn’t build for x86_64 on macOS 15 (Xcode 16): “Undefined symbols for architecture x86_64” while linking libgcc_s.1.dylib

[MacPorts]

#70866: gcc14 doesn’t build for x86_64 on macOS 15 (Xcode 16): “Undefined symbols
for architecture x86_64” while linking libgcc_s.1.dylib
---------------------------+-----------------------------------
  Reporter:  markmentovai  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  sonoma sequoia x86_64
      Port:  gcc14         |
---------------------------+-----------------------------------

Comment (by dbl001):

 I also tried building from branch:
 https://github.com/iains/gcc-14-branch/releases/tag/gcc-14.2-darwin-r1 on
 an Intel 2021 iMac 27" running macOS Sequoia.
 There are there patch files ... they didn't apply cleanly so I manually
 added to libgcc/config.host
 {{{
   x86_64-*-darwin2[0-2]*)
       tmake_file="t-darwin-min-11 t-darwin-libgccs1 $tmake_file"
       ;;
 }}}
 Then,
 {{{
 $ mkdir build
 $ cd build
 $ ../configure --with-
 sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
 $ make -j4
 }}}
 Finally,
 {{{
 ...
 rm libgcc_s.1.1.dylib_T*
 MLIBS=`/Users/davidlaxer/Downloads/gcc-14-branch-
 gcc-14.2-darwin-r1/build/./gcc/xgcc -B/Users/davidlaxer/Downloads/gcc-14
 -branch-gcc-14.2-darwin-r1/build/./gcc/ -B/usr/local/x86_64-apple-
 darwin24.0.0/bin/ -B/usr/local/x86_64-apple-darwin24.0.0/lib/ -isystem
 /usr/local/x86_64-apple-darwin24.0.0/include -isystem /usr/local/x86_64
 -apple-darwin24.0.0/sys-include   -fno-checking --print-multi-lib | sed -e
 's/;.*$//'` ; \
         for mlib in $MLIBS ; do \
           cp ../${mlib}/libgcc/${mlib}/libgcc_s.dylib  \
             ./libgcc_s.1.1.dylib_T_${mlib} || exit 1 ; \
           arch=`lipo -info libgcc_s.1.1.dylib_T_${mlib} | sed -e 's/.*:\
 //'` ; \
           /Users/davidlaxer/Downloads/gcc-14-branch-
 gcc-14.2-darwin-r1/build/./gcc/xgcc -B/Users/davidlaxer/Downloads/gcc-14
 -branch-gcc-14.2-darwin-r1/build/./gcc/ -B/usr/local/x86_64-apple-
 darwin24.0.0/bin/ -B/usr/local/x86_64-apple-darwin24.0.0/lib/ -isystem
 /usr/local/x86_64-apple-darwin24.0.0/include -isystem /usr/local/x86_64
 -apple-darwin24.0.0/sys-include   -fno-checking -arch ${arch}
 -nodefaultlibs -dynamiclib -nodefaultrpaths \
             -o libgcc_s.1.dylib_T_${mlib} \
             -Wl,-reexport_library,libgcc_s.1.1.dylib_T_${mlib} \
             -lSystem \
             -Wl,-reexported_symbols_list,../../../libgcc/config/darwin-
 unwind.ver \
             -install_name @rpath/libgcc_s.1.dylib \
             -compatibility_version 1 -current_version 1.1 ; \
         done
 Undefined symbols for architecture x86_64:
   "___deregister_frame_info", referenced from:
       <initial-undefines>
   "___deregister_frame_info_bases", referenced from:
       <initial-undefines>
   "___register_frame_info", referenced from:
       <initial-undefines>
   "___register_frame_info_bases", referenced from:
       <initial-undefines>
   "___register_frame_info_table", referenced from:
       <initial-undefines>
   "___register_frame_info_table_bases", referenced from:
       <initial-undefines>
   "___register_frame_table", referenced from:
       <initial-undefines>
 ld: symbol(s) not found for architecture x86_64
 collect2: error: ld returned 1 exit status
 make[3]: *** [libgcc_s.1.dylib] Error 1
 make[2]: *** [all-stage1-target-libgcc] Error 2
 make[1]: *** [stage1-bubble] Error 2
 make: *** [all] Error 2
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/70866#comment:18>
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