Builtins defined with BT_FN_INT_VAR etc. show as functions without a prototype and trigger the warning.
gcc/c/ PR c/119950 * c-typeck.cc (convert_arguments): Check for built-in function declaration before warning. gcc/testsuite/ * gcc.dg/Wdeprecated-non-prototype-5.c: New test. --- gcc/c/c-typeck.cc | 3 ++- gcc/testsuite/gcc.dg/Wdeprecated-non-prototype-5.c | 14 ++++++++++++++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc index 55d896e02df..f8d1f711513 100644 --- a/gcc/c/c-typeck.cc +++ b/gcc/c/c-typeck.cc @@ -4342,7 +4342,8 @@ convert_arguments (location_t loc, vec<location_t> arg_loc, tree fntype, builtin_typetail = NULL_TREE; } - if (!typetail && parmnum == 0 && !TYPE_NO_NAMED_ARGS_STDARG_P (fntype)) + if (!typetail && parmnum == 0 && !TYPE_NO_NAMED_ARGS_STDARG_P (fntype) + && !fndecl_built_in_p (fundecl)) { auto_diagnostic_group d; bool warned; diff --git a/gcc/testsuite/gcc.dg/Wdeprecated-non-prototype-5.c b/gcc/testsuite/gcc.dg/Wdeprecated-non-prototype-5.c new file mode 100644 index 00000000000..b231a74cebe --- /dev/null +++ b/gcc/testsuite/gcc.dg/Wdeprecated-non-prototype-5.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-Wdeprecated-non-prototype" } */ + +static inline +int f (int x) +{ + return __builtin_constant_p (x); +} + +static inline +int g (double x) +{ + return __builtin_isfinite (x); +} base-commit: 0035613389a939043d654aea7a76faae95f69422