https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86517
--- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> ---
The problem is logic in lto-wrapper (which is mine)
/* Merge PIC options:
-fPIC + -fpic = -fpic
-fPIC + -fno-pic = -fno-pic
-fpic/-fPIC + nothin = nothing.
It is a common mistake to mix few -fPIC compiled objects into otherwise
non-PIC code. We do not want to build everything with PIC then.
It would be good to warn on mismatches, but it is bit hard to do as
we do not know what nothing translates to. */
for (unsigned int j = 0; j < *decoded_options_count;)
if ((*decoded_options)[j].opt_index == OPT_fPIC
|| (*decoded_options)[j].opt_index == OPT_fpic)
{
if (!pic_option
|| (pic_option->value > 0) != ((*decoded_options)[j].value > 0))
remove_option (decoded_options, j, decoded_options_count);
else if (pic_option->opt_index == OPT_fPIC
&& (*decoded_options)[j].opt_index == OPT_fpic)
{
(*decoded_options)[j] = *pic_option;
j++;
}
else
j++;
}
else if ((*decoded_options)[j].opt_index == OPT_fPIE
|| (*decoded_options)[j].opt_index == OPT_fpie)
{
if (!pie_option
|| pie_option->value != (*decoded_options)[j].value)
remove_option (decoded_options, j, decoded_options_count);
else if (pie_option->opt_index == OPT_fPIE
&& (*decoded_options)[j].opt_index == OPT_fpie)
{
(*decoded_options)[j] = *pie_option;
j++;
}
else
j++;
}
PIC merging is OK, but PIE merging should not remove PIE if PIC is provided in
other units.
I am looking into fix.
Honza
