ld.elf_so powerpc: remove bogus ldscript

This ldscript is not needed and actually makes things worse by putting
everything in one LOAD section, which then needs to have rwx permission.
Remove it so that we get two LOAD sections with better permissions.
Fixes PR 57323.

Rework ifunc support to address a number of short comings:
- Move to a shared _rtld_call_ifunc for rel and rela architectures
- Architectures using rel format must patch IRELATIVE non-PLT
relocations like RELATIVE in additition to the later ifunc handling
- Consistently record the delta to the end of the relocation group for
non-PLT IRELATIVE relocations

Hidden ifunc is now supported on all ifunc platforms, even when using
-fno-plt. The combination of -fno-plt and relro is broken due to
incorrect GNU ld output though.

branches: 1.15.14;
Use -fPIC since powerpc64 is always compiled as -fPIC and -fpic would cause
__PIC__ to change.

Build position independent on PPC64, too.

powerpc64 changes

branches: 1.12.2; 1.12.8;
avoid linker warnings with the new binutils by not forcing ld.elf_so
to be soft-float. the floating-point usage in ld.elf_so is only
because of stdarg functions like printf(), and gcc 4.5 is good
about not actually executing the FP instructions in such functions
unless FP values are passed to them, which ld.elf_so doesn't do.

Fix start symbol for newer binutils.

Explicitly prefix ld(1) options in LDFLAGS with "-Wl," rather than
using the ${LDFLAGS:@F@-Wl,$F@} make substitution because that breaks
if LDFLAGS is already set.

Move common LDFLAGS into Makefile from arch/*/Makefile.inc

Whitespace.

Remove vestiges of VARPSZ.

-I${.CURDIR} is done at the top-level, so there's no need to do it here.

branches: 1.5.2;
Grumble. Put compiler options back into CPPFLAGS for now, since
they're needed to build .S files with the correct PIC options.

XXX Really needs cleanup in <bsd.*.mk> to do this properly.

Don't put compiler options into CPPFLAGS.

Add code to use the kernel provided page size.
Enable this on the powerpc only for now.

PR/6824: Erik Bertelsen: Missed arch directory in recent move.

Add powerpc support.

Rework ifunc support to address a number of short comings:
- Move to a shared _rtld_call_ifunc for rel and rela architectures
- Architectures using rel format must patch IRELATIVE non-PLT
relocations like RELATIVE in additition to the later ifunc handling
- Consistently record the delta to the end of the relocation group for
non-PLT IRELATIVE relocations

Hidden ifunc is now supported on all ifunc platforms, even when using
-fno-plt. The combination of -fno-plt and relro is broken due to
incorrect GNU ld output though.

branches: 1.15.14;
Use -fPIC since powerpc64 is always compiled as -fPIC and -fpic would cause
__PIC__ to change.

Build position independent on PPC64, too.

powerpc64 changes

branches: 1.12.2; 1.12.8;
avoid linker warnings with the new binutils by not forcing ld.elf_so
to be soft-float. the floating-point usage in ld.elf_so is only
because of stdarg functions like printf(), and gcc 4.5 is good
about not actually executing the FP instructions in such functions
unless FP values are passed to them, which ld.elf_so doesn't do.

Fix start symbol for newer binutils.

Explicitly prefix ld(1) options in LDFLAGS with "-Wl," rather than
using the ${LDFLAGS:@F@-Wl,$F@} make substitution because that breaks
if LDFLAGS is already set.

Move common LDFLAGS into Makefile from arch/*/Makefile.inc

Whitespace.

Remove vestiges of VARPSZ.

-I${.CURDIR} is done at the top-level, so there's no need to do it here.

branches: 1.5.2;
Grumble. Put compiler options back into CPPFLAGS for now, since
they're needed to build .S files with the correct PIC options.

XXX Really needs cleanup in <bsd.*.mk> to do this properly.

Don't put compiler options into CPPFLAGS.

Add code to use the kernel provided page size.
Enable this on the powerpc only for now.

PR/6824: Erik Bertelsen: Missed arch directory in recent move.

Add powerpc support.