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elf: Suppress unused function clang for __ifunc_resolver 

The __ifunc_resolver macro expands to:

  extern __typeof (__redirect_name) name __attribute__ ((ifunc ("iname_ifunc")));
  static __typeof (__redirect_name) *name_ifunc (void) { [...] };

And although NAME_IFUNC is and alias for NAME, clang-18 still emits
an 'unused function 'name_ifunc' [-Werror,-Wunused-function]'
warning.
This commit is contained in:
Adhemerval Zanella 2025-01-03 08:33:16 -03:00
parent f28702b2ee
commit 6a498d780e
2 changed files with 8 additions and 0 deletions
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4
elf/ifuncmain9.c
View File

@ -22,6 +22,7 @@
#include <stdbool.h>
#include <stdio.h>
#include <libc-diag.h>
#if __GNUC_PREREQ (5, 5)
/* Do not use the test framework, so that the process setup is not
@ -41,6 +42,8 @@ implementation (void)
return random_constant;
}
DIAG_PUSH_NEEDS_COMMENT_CLANG;
DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunused-function");
static __typeof__ (implementation) *
inhibit_stack_protector
resolver (void)
@ -50,6 +53,7 @@ resolver (void)
}
static int magic (void) __attribute__ ((ifunc ("resolver")));
DIAG_POP_NEEDS_COMMENT_CLANG;
int
main (void)

4
elf/tst-ifunc-fault-lazy.c
View File

@ -21,6 +21,7 @@
relocations. */
#include <config.h>
#include <libc-diag.h>
#ifdef HAVE_GCC_IFUNC
@ -34,6 +35,8 @@ implementation (void)
*p = 0;
}
DIAG_PUSH_NEEDS_COMMENT_CLANG;
DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunused-function");
static __typeof__ (implementation) *
resolver (void)
{
@ -42,6 +45,7 @@ resolver (void)
*p = 0;
return implementation;
}
DIAG_POP_NEEDS_COMMENT_CLANG;
static void magic (void) __attribute__ ((ifunc ("resolver")));