Re: [PATCH] Kconfig:Uses glibc so strscpy has to be manually- added

[kernel test robot <lkp@intel.com>]

Hi Biancaa,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.18-rc2 next-20251022]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Biancaa-Ramesh/Kconfig-Uses-glibc-so-strscpy-has-to-be-manually-added/20251022-011608
base:   linus/master
patch link:    https://lore.kernel.org/r/20251021171446.46942-1-biancaa2210329%40ssn.edu.in
patch subject: [PATCH] Kconfig:Uses glibc so strscpy has to be manually- added
config: arm-randconfig-r071-20251022 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251022/202510221519.nzy5mUJ3-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510221519.nzy5mUJ3-lkp@intel.com/

All errors (new ones prefixed by >>):

   scripts/kconfig/util.c: In function 'str_new':
>> scripts/kconfig/util.c:70:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
      70 |         strscpy(gs.s, "\0");
         |         ^~~~~~~
         |         strlcpy
   scripts/kconfig/symbol.c: In function 'sym_set_string_value':
>> scripts/kconfig/symbol.c:812:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
     812 |         strscpy(val, newval);
         |         ^~~~~~~
         |         strlcpy
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/util.o] Error 1
   scripts/kconfig/confdata.c: In function 'conf_touch_dep':
>> scripts/kconfig/confdata.c:157:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
     157 |         strscpy(depfile_path + depfile_prefix_len, name);
         |         ^~~~~~~
         |         strlcpy
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/confdata.o] Error 1
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/symbol.o] Error 1
   make[3]: Target 'oldconfig' not remade because of errors.
   make[2]: *** [Makefile:742: oldconfig] Error 2
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'oldconfig' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'oldconfig' not remade because of errors.
--
   scripts/kconfig/util.c: In function 'str_new':
>> scripts/kconfig/util.c:70:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
      70 |         strscpy(gs.s, "\0");
         |         ^~~~~~~
         |         strlcpy
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/util.o] Error 1
   scripts/kconfig/confdata.c: In function 'conf_touch_dep':
>> scripts/kconfig/confdata.c:157:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
     157 |         strscpy(depfile_path + depfile_prefix_len, name);
         |         ^~~~~~~
         |         strlcpy
   scripts/kconfig/symbol.c: In function 'sym_set_string_value':
>> scripts/kconfig/symbol.c:812:9: error: implicit declaration of function 'strscpy'; did you mean 'strlcpy'? [-Wimplicit-function-declaration]
     812 |         strscpy(val, newval);
         |         ^~~~~~~
         |         strlcpy
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/confdata.o] Error 1
   make[3]: *** [scripts/Makefile.host:131: scripts/kconfig/symbol.o] Error 1
   make[3]: Target 'olddefconfig' not remade because of errors.
   make[2]: *** [Makefile:742: olddefconfig] Error 2
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'olddefconfig' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'olddefconfig' not remade because of errors.


vim +70 scripts/kconfig/util.c

    62	
    63	/* Allocate initial growable string */
    64	struct gstr str_new(void)
    65	{
    66		struct gstr gs;
    67		gs.s = xmalloc(sizeof(char) * 64);
    68		gs.len = 64;
    69		gs.max_width = 0;
  > 70		strscpy(gs.s, "\0");
    71		return gs;
    72	}
    73	

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