libobjc2 2.2.1 segfaulting on aarch64 on Debian 13

Hello

I am porting my code to Debian13 after running sucessfully running for 
years under Debian 11 and 12.

So I compiled the whole gnustep stack with not much hassle. When I try 
to compile my own code however, it fails already at ./configure

And it seems to be that ./configure runs a simple test to see if its 
cross compiling or not where it fails.

It boils down to this command line

clang -o conftest -fPIC -DLINUX -D_XOPEN_SOURCE=700 -D_POSIX_SOURCE 
-D_DEFAULT_SOURCE -fobjc-arc -MMD -MP -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 
-DGNU_GUI_LIBRARY=1 -DGNUSTEP_RUNTIME=1 -D_NONFRAGILE_ABI=1 
-DGNUSTEP_BASE_LIBRARY=1 -fno-strict-aliasing -fexceptions 
-fobjc-exceptions -D_NATIVE_OBJC_EXCEPTIONS -pthread -fPIC -Wall 
-DGSWARN -DGSDIAGNOSE -Wno-import -I //include -fblocks 
-fobjc-runtime=gnustep-2.2 -fblocks 
-fconstant-string-class=NSConstantString -I. 
-I/Users/afink/GNUstep/Library/Headers -I/usr/local/include 
-I/usr/include  -DHAVE_OPENSSL=1   -pthread -fexceptions -rdynamic 
-fobjc-runtime=gnustep-2.2 -fblocks 
-L/Users/afink/GNUstep/Library/Libraries -L/usr/local/lib -L/usr/lib 
-lgnustep-base -lpthread -l:libobjc.so.4.6 -lm -lssl -lcrypto  
conftest.c -ldl -ldl

a simple program in conftest.c:

int main() { return 0; }

compiling works but running produces a SIGSEGV.

LLDB points to this line in the code

(lldb) run
Process 99524 launched: '/Users/afink/development/git/ulib/conftest' 
(aarch64)
Process 99524 stopped
* thread #1, name = 'conftest', stop reason = signal SIGSEGV: address 
not mapped to object (fault address: 0x0)
     frame #0: 0x0000fffff7859088 
libobjc.so.4.6`upgradePropertyList(l=0x0000fffff6e80402) at legacy.c:328:11
    325         }
    326         size_t data_size = l->count * sizeof(struct objc_property);
    327         struct objc_property_list *n = calloc(1, sizeof(struct 
objc_property_list) + data_size);
-> 328         n->count = l->count;
    329         n->size = sizeof(struct objc_property);
    330         for (int i=0 ; i<l->count ; i++)
    331         {


sizeof(struct objc_property_list) = 16

sizeof(struct objc_property) = 40;

(lldb) print *l
(objc_property_list_gsv1) {
   count = 712114218
   next = 0x304036314900383a
   properties = {}
}

so calloc fails with 712114218 * 40 * 16 bytes = 455GB...

something is clearly not initialized

Backtrace is this:

     frame #0: 0x0000fffff7859088 
libobjc.so.4.6`upgradePropertyList(l=0x0000fffff6e80402) at legacy.c:328:11
     frame #1: 0x0000fffff7858ecc 
libobjc.so.4.6`objc_upgrade_class(oldClass=<unavailable>) at legacy.c:357:20
   * frame #2: 0x0000fffff78528cc 
libobjc.so.4.6`__objc_exec_class(module=<unavailable>) at loader.c:352:19
     frame #3: 0x0000fffff7fc1b4c 
ld-linux-aarch64.so.1`___lldb_unnamed_symbol61 + 236
     frame #4: 0x0000fffff7fc1c60 
ld-linux-aarch64.so.1`___lldb_unnamed_symbol62 + 120
     frame #5: 0x0000fffff7fd8360 
ld-linux-aarch64.so.1`___lldb_unnamed_symbol236 + 96

    349         // Load the classes from this module
    350         for (unsigned short i=0 ; i<symbols->class_count ; i++)
    351         {
-> 352  objc_load_class(objc_upgrade_class(symbols->definitions[defs++]));
    353         }


These is what ccmake reports

  BUILD_STATIC_LIBOBJC             ON
  CMAKE_BUILD_TYPE                 RelWithDebInfo
  CMAKE_INSTALL_PREFIX             /usr
  CPACK_GENERATOR                  TGZ
  CPACK_STRIP_FILES                ON
  DEBUG_ARC_COMPAT                 OFF
  EMBEDDED_BLOCKS_RUNTIME          ON
  ENABLE_OBJCXX                    ON
  ENABLE_TRACING                   OFF
  FETCHCONTENT_BASE_DIR 
/Users/afink/development/gnustep_build/libobjc2/build/_deps
  FETCHCONTENT_FULLY_DISCONNECTE   OFF
  FETCHCONTENT_QUIET               ON
  FETCHCONTENT_UPDATES_DISCONNEC   OFF
  GNUSTEP_CONFIG                   /usr/bin/gnustep-config
  GNUSTEP_INSTALL_TYPE             SYSTEM
  INCLUDE_DIRECTORY                objc
  LEGACY_COMPAT                    OFF
  LIBOBJC_NAME                     objc
  M_LIBRARY /usr/lib/aarch64-linux-gnu/libm.so
  OLDABI_COMPAT                    ON
  STRICT_APPLE_COMPATIBILITY       OFF
  TESTS                            OFF
  TYPE_DEPENDENT_DISPATCH          ON
  tsl-robin-map_DIR                /usr/share/cmake/tsl-robin-map

I tried with OLDABI_COMPAT OFF and then it breaks at

* thread #1, name = 'conftest', stop reason = signal SIGSEGV: address 
not mapped to object (fault address: 0x0)
     frame #0: 0x0000fffff785e774 libobjc.so.4.6`selector_lookup(char 
const*, char const*) [inlined] 
tsl::rh::power_of_two_growth_policy<2ul>::bucket_for_hash(this=0x0000000000000000, 
hash=18399730721004063734) const at robin_growth_policy.h:125:19
    122        * If bucket_count() is 0, it must always return 0.
    123        */
    124       std::size_t bucket_for_hash(std::size_t hash) const noexcept {
-> 125         return hash & m_mask;
    126       }
    127
    128       /**


libobjc was built with the following command line

         export CC="/usr/bin/clang"
         export CXX="/usr/bin/clang++"
         export PREFIX="/"
         export 
PATH="/usr/GNUstep/System/Tools:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin"
         export 
PKG_CONFIG_PATH="/usr/lib/pkgconfig/:/usr/local/lib/pkgconfig/"
         export RUNTIME_VERSION="gnustep-2.0"
         export OBJCFLAGS="-fblocks"
         export CFLAGS="-I ${PREFIX}/include"
         export GNUSTEP_INSTALLATION_DOMAIN="SYSTEM"

     cmake  .. -DCMAKE_BUILD_TYPE=RelWithDebInfo 
-DBUILD_STATIC_LIBOBJC=1 -DCMAKE_C_COMPILER=${CC} 
-DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_INSTALL_PREFIX=/usr

I tried with clang17,18,19 with same results

anyone have an idea whats going rouge here?