building llvm compiler-rt(?) fails when compiler using fortify headers

[nekopsykose]

FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/eprintf.c.o 
/builddir/llvm-bootstrap-17.0.6/build/./bin/clang --target=x86_64-chimera-linux-musl -DVISIBILITY_HIDDEN  -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -O2 -pipe -ffile-prefix-map=/builddir/llvm-bootstrap-17.0.6=. -fPIC -O3 -DNDEBUG -m32 -fno-lto -std=c11 -fno-builtin -fvisibility=hidden -fomit-frame-pointer -DCOMPILER_RT_HAS_FLOAT16 -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/eprintf.c.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/eprintf.c.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/eprintf.c.o -c /builddir/llvm-bootstrap-17.0.6/compiler-rt/lib/builtins/eprintf.c
In file included from /builddir/llvm-bootstrap-17.0.6/compiler-rt/lib/builtins/eprintf.c:10:
/usr/include/fortify/stdio.h:150:47: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 2 of function '__orig_vsnprintf' has type 'size_t' (aka 'unsigned long'), but parameter 2 of function '__builtin_vsnprintf' has type 'unsigned int'
  150 | __diagnose_as_builtin(__builtin_vsnprintf, 1, 2, 3, 4)
      |                                               ^
1 error generated.
[105/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/udivsi3.c.o
[106/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/udivti3.c.o
[107/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/clear_cache.c.o
[108/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/i386/fp_mode.c.o
[109/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/umodsi3.c.o
[110/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/enable_execute_stack.c.o
[111/310] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/emutls.c.o
FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/emutls.c.o 
/builddir/llvm-bootstrap-17.0.6/build/./bin/clang --target=x86_64-chimera-linux-musl -DVISIBILITY_HIDDEN  -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -O2 -pipe -ffile-prefix-map=/builddir/llvm-bootstrap-17.0.6=. -fPIC -O3 -DNDEBUG -m32 -fno-lto -std=c11 -fno-builtin -fvisibility=hidden -fomit-frame-pointer -DCOMPILER_RT_HAS_FLOAT16 -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/emutls.c.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/emutls.c.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-i386.dir/emutls.c.o -c /builddir/llvm-bootstrap-17.0.6/compiler-rt/lib/builtins/emutls.c
In file included from /builddir/llvm-bootstrap-17.0.6/compiler-rt/lib/builtins/emutls.c:11:
/usr/include/fortify/string.h:45:47: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_memcpy' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_memcpy' has type 'unsigned int'
   45 | __diagnose_as_builtin(__builtin_memcpy, 1, 2, 3)
      |                                               ^
/usr/include/fortify/string.h:70:48: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_memmove' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_memmove' has type 'unsigned int'
   70 | __diagnose_as_builtin(__builtin_memmove, 1, 2, 3)
      |                                                ^
/usr/include/fortify/string.h:89:47: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_memset' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_memset' has type 'unsigned int'
   89 | __diagnose_as_builtin(__builtin_memset, 1, 2, 3)
      |                                               ^
/usr/include/fortify/string.h:107:47: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_memchr' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_memchr' has type 'unsigned int'
  107 | __diagnose_as_builtin(__builtin_memchr, 1, 2, 3)
      |                                               ^
/usr/include/fortify/string.h:262:48: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_strncat' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_strncat' has type 'unsigned int'
  262 | __diagnose_as_builtin(__builtin_strncat, 1, 2, 3)
      |                                                ^
/usr/include/fortify/string.h:285:48: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 3 of function '__orig_strncpy' has type 'size_t' (aka 'unsigned long'), but parameter 3 of function '__builtin_strncpy' has type 'unsigned int'
  285 | __diagnose_as_builtin(__builtin_strncpy, 1, 2, 3)
      |                                                ^
6 errors generated.

trying to reproduce normally with -fno-builtin or similar doesn't repro, so there is probably something funny in the compiler-rt build

[nekopsykose]

ah, a repro:

copypaste online example:

/* vsnprintf example */
#include <stdio.h>
#include <stdarg.h>

void PrintFError ( const char * format, ... )
{
  char buffer[256];
  va_list args;
  va_start (args, format);
  vsnprintf (buffer,256,format, args);
  perror (buffer);
  va_end (args);
}

int main ()
{
   FILE * pFile;
   char szFileName[]="myfile.txt";

   pFile = fopen (szFileName,"r");
   if (pFile == NULL)
     PrintFError ("Error opening '%s'",szFileName);
   else
   {
     // file successfully open
     fclose (pFile);
   }
   return 0;
}

then:

$ cc main.c -m32 -c -O1                                                                                                            
In file included from /tmp/mytemp.ADnlpp/main.c:2:
/usr/include/fortify/stdio.h:150:47: error: 'diagnose_as_builtin' attribute parameter types do not match: parameter 2 of function '__orig_vsnprintf' has type 'size_t' (aka 'unsigned long'), but parameter 2 of function '__builtin_vsnprintf' has type 'unsigned int'
  150 | __diagnose_as_builtin(__builtin_vsnprintf, 1, 2, 3, 4)
      |                                               ^
1 error generated.

removing either optimisation (-O0 or no arg) or -m32 doesn't reproduce

[nekopsykose]

you can use a chimeralinux/chimera container and apk add clang to repro this manually if you need