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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105169] Compiling C++ code with
 -fpatchable-function-entry=16,14 results in references to discarded sections
Date: Fri, 08 Apr 2022 12:11:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105169

--- Comment #9 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
> +         const char *sname =3D "__patchable_function_entries";
> +         const char *name =3D DECL_SECTION_NAME (current_function_decl);
> +
> +         dot =3D strchr (name + 1, '.');
> +         if (!dot)
> +           dot =3D name;
> +         len =3D strlen (dot) + strlen (sname) + 1;
> +         rname =3D (char *) alloca (len);
> +
> +         strcpy (rname, sname);
> +         strcat (rname, dot);

I would prefer using concat function, so something like:

          char *rname
            =3D concat ("__patchable_function_entries", dot, NULL);
          sect =3D get_section (rname, (SECTION_LINKONCE | flags),
                              current_function_decl);
          free (rname);=