Le 28 nov. 2011 à 12:16, Romain Geissler a écrit :
> Hi,
>
> The current trunk have no support for the __stpncpy_chk function. As the
> latest
> OS X (10.7 aka Lion) now defines stpncpy as a call to builtin__stpncpy_chk for
> GNUC compliant compiler, the following code won't link:
>
> #include <string.h>
>
> int main(){
> char string[10];
> stpncpy(string,"abcd",8);
>
> return 0;
> }
>
> Undefined symbols for architecture x86_64:
> "___builtin___stpncpy_chk", referenced from:
> _main in ccGFZoZV.o
> ld: symbol(s) not found for architecture x86_64
> collect2: error: ld returned 1 exit status
>
>
> This patch add support for this builtin.
> Bootstrapped and tested without regression on darwin x86_64.
>
> Romain Geissler
>
> gcc/
>
> 2011-11-28 Romain Geissler <romain.geiss...@gmail.com>
>
> * builtins.def (BUILT_IN_STPNCPY_CHK): New definition.
> * builtins.c (expand_builtin, fold_builtin_4, maybe_emit_chk_warning):
> Add BUILT_IN_STPNCPY_CHK case.
> * gimple-fold.c (gimple_fold_builtin): Likewise.
> * tree-object-size.c (pass_through_call): Likewise.
> * tree-ssa-alias.c (ref_maybe_used_by_call_p_1,
> call_may_clobber_ref_p_1): Likewise.
> * tree-ssa-structalias.c (find_func_aliases_for_builtin_call,
> find_func_clobbers): Likewise.
> * tree.h (fold_builtin_strncpy_chk): Rename to fold_builtin_stxncpy_chk
> * builtins.c (fold_builtin_strncpy_chk): Likewise.
> Rewrite stpncpy_chk calls to strncpy_chk calls if returned value is
> ignored.
>
> gcc/testsuite/
>
> 2011-11-28 Romain Geissler <romain.geiss...@gmail.com>
>
> * gcc.c-torture/execute/builtins/chk.h (stpncpy, stpncpy_disallowed):
> New definitions.
> * gcc.c-torture/execute/builtins/lib/chk.c (stpncpy_disallowed):
> Likewise.
> (stpncpy, __stpncpy_chk): New functions.
> * gcc.c-torture/execute/builtins/stpncpy-chk-lib.c: New file.
> * gcc.c-torture/execute/builtins/stpncpy-chk.c: Likewise.
>
> <lion_build.patch>
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