Instead of compiling files with -fcommon, create an include file and declare
the 3 symbols that need to be common using an attribute. Put all the 3 symbol
definitions in libc in one place (initfini.c). Reviewed by joerg@

Explicitly use -fcommon for globals shared between libc and CSU.

fix duplicated chunk from merge

Merge the [pgoyette-compat] branch

Specify NOLIBCSANITIZER in lib/csu

The low-level libraries in csu are used in non-sanitized code.

branches: 1.36.2;
Disable MKSANITIZER in lib/csu

These low-level libraries are expected to be not touched by a sanitizer.
Every libc program not using sanitizers cannot work with sanitized csu.

branches: 1.35.22;
MKCOMPAT fixes for when compat MACHINE_CPU != normal MACHINE_CPU

Retire USE_COMPILERCRTSTUFF=yes.

branches: 1.33.2;
Add support for a NetBSD MARCH elf note to record the MACHINE_ARCH for
which a program was compiled.

Make all earm variants use earm.

branches: 1.31.2;
Unbreak compat.

Allow USE_COMPILERCRTSTUFF=yes for platforms that use MACHINE_CPU !=
MACHINE_ARCH.

branches: 1.29.4;
use of .PARSEDIR just doesn't work with .OBJDIR, replace with .CURDIR

branches: 1.28.2;
Centralise USE_COMPILERCRTSTUFF.

PCC might need help.

Switch i386 and x86_64 to the new CRT layout. The crt0.c body is shared
between all platforms and a small assembler stub in crt0.S is used for
setting up the proper stack and whatever else MD needs.

Extract crti.S and crtn. from the old dot_init.h files. Prepare other
platforms that use the 6-argument form of __(_)start for this.

Rewrite the crtbegin and crtend modules in assembler to make them
compiler independent. Document the interface in README.

delete all the a.out csu code.

look for ${CSU_MACHINE_ARCH}_elf directory first.

branches: 1.24.40; 1.24.46;
${MACHINE_ARCH} != "arm32" is always true now, so remove it from an if.

- Fix typo
- Wrap long line

use MACIHNE_CPU to determine architecture-dependent source code directory.
is use of exists(foo) safe enough?
TODO: many other places to fix

sh3 split

More trailing white space.

Oops, revert previous; thinko.

Go ahead and built c++rt0.o on all non-ELF platforms (i.e. including arm32;
the hacks to make this work have been committed).

Don't build c++rt.o if ELF.

This needs to use C///, not S///.

Clean up mipse[bl]->mips substitution.

make this build again after the mips->mipse? transition

If object_fmt == elf and we have machine_elf, build that one.

Do not build on arm32 by default.
This is temporary.

GC alpha's ECOFF_TOOLCHAIN make variable, and related bits. Nobody
should be using an ECOFF toolchain on NetBSD/alpha any more.

NetBSD/powerpc doesn't use the "generic" c++rt0.o

Someone forgot a line continuation character

turn Alpha's ELF_TOOLCHAIN checks to ECOFF_TOOLCHAIN checks

RCS id police.

add a hack so that old- and new-toolchain alphas do the right thing:
include bsd.own.mk early on, and if !alpha or if !ELF_TOOLCHAIN,
build c++rt0.o. ELF alphas don't use the 'normal' C++ runtime startup
routines. Eventually, there should be better ways to distinguish what
toolchain and object format is in use, and the Alpha C++ startup code
changes should be merged with that used by the other ports.

c++ not g++

Subdirectory g++ contains C++ shared library helper routines.

use MACHINE_ARCH to pick which crt0 to use.

oops; last time i moved stuff, was to the wrong place...
don't use csu.* any more, just use *...

move csu.${MACHINE} into a "csu" subdirectory.