openmp: Add crtoffloadtableS.o and use it [PR117851]

Unlike crtoffload{begin,end}.o which just define some symbols at the start/end
of the various .gnu.offload* sections, crtoffloadtable.o contains
const void *const __OFFLOAD_TABLE__[]
  __attribute__ ((__visibility__ ("hidden"))) =
{
  &__offload_func_table, &__offload_funcs_end,
  &__offload_var_table, &__offload_vars_end,
  &__offload_ind_func_table, &__offload_ind_funcs_end,
};
The problem is that linking this into PIEs or shared libraries doesn't
work when it is compiled without -fpic/-fpie - __OFFLOAD_TABLE__ for non-PIC
code is put into .rodata section, but it really needs relocations, so for
PIC it should go into .data.rel.ro/.data.rel.ro.local.
As I think we don't want .data.rel.ro section in non-PIE binaries, this patch
follows the path of e.g. crtbegin.o vs. crtbeginS.o and adds crtoffloadtableS.o
next to crtoffloadtable.o, where crtoffloadtableS.o is compiled with -fpic.

2024-11-30  Jakub Jelinek  <jakub@redhat.com>

	PR libgomp/117851
gcc/
	* lto-wrapper.cc (find_crtoffloadtable): Add PIE_OR_SHARED argument,
	search for crtoffloadtableS.o rather than crtoffloadtable.o if
	true.
	(run_gcc): Add pie_or_shared variable.  If OPT_pie or OPT_shared or
	OPT_static_pie is seen, set pie_or_shared to true, if OPT_no_pie is
	seen, set pie_or_shared to false.  Pass it to find_crtoffloadtable.
libgcc/
	* configure.ac (extra_parts): Add crtoffloadtableS.o.
	* Makefile.in (crtoffloadtableS$(objext)): New goal.
	* configure: Regenerated.

0 files changed, 0 insertions, 0 deletions