move constructor handling to targetm

[Richard Henderson <rth at redhat dot com>]

Constructor handling falls into four categories:

 (1) Target supports named sections and uses .ctors/.dtors
 (2) Target has special support for .ctors/.dtors sections,
     but not generic named sections.
 (3) Target uses GNU ld .stabs set constructors.
 (4) Target uses collect2.

With a very small number of exceptions, all of the code for
(1) and (2) in all of the target headers is identical, and
can be implemented very simply in varasm.c.

The following does just that, removing over 2000 lines from
target headers in the process.

It has been tested as detailed below.


r~


BOOTSTRAP
	alphaev6-linux
	i686-linux

BUILD CC1 + SMALL TEST FILE
	a29k-bsd
	a29k-udi
	a29k-rtems
	alpha-dec-osf4
	alpha-dec-vms
	arm-coff
	arm-rtems
	arm-netbsd
	arm-linux
	c4x-elf
	clipper-intergraph-clix
	h8300-hms
	i386-ibm-aix --without-gnu-as
	i386-ibm-aix --with-gnu-as
	i386-cygwin
	i386-sequent-ptx2
	m68hc11
	m68k-coff
	m68k-bull-sysv --without-gnu-as
	m68k-bull-sysv --with-gnu-as
	m68k-ncr-sysv
	m68k-lynxos
	m68k-psos
	m88k-dolphin-sysv3
	mcore-pe
	mips-sgi-irix6
	mips-elf
	hppa64-hpux11
	powerpc-eabisim
	sh-elf
	sh-hms
	sparc64-linux
	vax-vms

WOULD NOT BUILD
	arm-semi-aof
	* Makefile.in (MAYBE_USE_COLLECT2): Remove; purge all uses.
	(USE_COLLECT2): Remove duplicate definition.
	* config.gcc (a29k-udi, a29k-wrs-vxworks) [tm_file]: Remove a29k/udi.h.
	(use_collect2): Remove dead code.
	* configure.in (use_collect2): Remove will_use_collect2 and
	maybe_use_collect2; add USE_COLLECT2 to host_xm_defines and xm_defines.
	* configure: Rebuild.

	* target.h (targetm.asm_out.constructor): New.
	(targetm.asm_out.destructor, targetm.have_ctors_dtors): New.
	* target-def.h (TARGET_ASM_CONSTRUCTOR): New.
	(TARGET_ASM_DESTRUCTOR, TARGET_HAVE_CTORS_DTORS): New.
	* varasm.c (in_ctors, in_dtors): New.
	(assemble_constructor, assemble_destructor): Remove.
	(default_stabs_asm_out_destructor): New.
	(default_named_section_asm_out_destructor): New.
	(dtors_section, default_dtor_section_asm_out_destructor): New.
	(default_stabs_asm_out_constructor): New.
	(default_named_section_asm_out_constructor): New.
	(ctors_section, default_ctor_section_asm_out_constructor): New.
	* output.h: Update declarations.
	* c-decl.c (c_expand_body): Use target hooks instead of
	assemble_constructor and assemble_destructor.
	* profile.c (output_func_start_profiler): Likewise.
	* objc/objc-act.c (finish_objc): Likewise.
	(build_module_descriptor): Tidy.  Set TREE_PUBLIC properly
	for the constructor.
	* objc/Make-lang.in (objc-act.o): Depend on TARGET_H.

	* crtstuff.c (CTORS_SECTION_ASM_OP): Don't define.
	(DTORS_SECTION_ASM_OP): Likewise.
	(__CTOR_LIST__): Use attribute section when possible.
	(__DTOR_LIST__, __CTOR_END__, __DTOR_END__): Likewise.

	* defaults.h (EH_FRAME_SECTION_NAME): Don't depend on
	ASM_OUTPUT_CONSTRUCTOR.

	* config/darwin.c (machopic_asm_out_constructor): New.
	(machopic_asm_out_destructor): New.
	* config/darwin-protos.h: Update declarations.
	* config/darwin.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.
	* config/nextstep.c (nextstep_asm_out_constructor): New.
	(nextstep_asm_out_destructor): New.
	* config/nextstep.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.
	* config/nextstep21.h: Undef TARGET_ASM_*STRUCTOR instead of
	ASM_OUTPUT_*STRUCTOR.
	* config/i386/aix386ng.h: Likewise.

	* config/elfos.h (CTORS_SECTION_ASM_OP, DTORS_SECTION_ASM_OP): Remove.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): No ctors/dtors.
	(CTORS_SECTION_FUNCTION, DTORS_SECTION_FUNCTION): Remove.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Remove.
	* config/lynx.h: Likewise.
	* config/netware.h: Likewise.
	* config/psos.h: Likewise.
	* config/alpha/alpha-interix.h: Likewise.
	* config/alpha/elf.h: Likewise.
	* config/arc/arc.h: Likewise.
	* config/arm/aof.h: Likewise.
	* config/arm/coff.h: Likewise.
	* config/arm/elf.h: Likewise.
	* config/c4x/c4x.h: Likewise.
	* config/h8300/h8300.h: Likewise.
	* config/i386/cygwin.h: Likewise.
	* config/i386/djgpp.h: Likewise.
	* config/i386/i386-coff.h: Likewise.
	* config/i386/i386-interix.h: Likewise.
	* config/i386/sco5.h: Likewise.
	* config/i386/vsta.h: Likewise.
	* config/i386/win32.h: Likewise.
	* config/i960/i960-coff.h: Likewise.
	* config/ia64/sysv4.h: Likewise.
	* config/m68hc11/m68hc11.h: Likewise.
	* config/m68k/coff.h: Likewise.
	* config/m68k/mot3300.h: Likewise.
	* config/m88k/m88k.h: Likewise.
	* config/mcore/mcore-pe.h: Likewise.
	* config/mcore/mcore.h: Likewise.
	* config/mips/elf.h: Likewise.
	* config/mips/elf64.h: Likewise.
	* config/mips/iris6.h: Likewise.
	* config/pa/pa64-hpux.h: Likewise.
	* config/rs6000/sysv4.h: Likewise.
	* config/sh/sh.h: Likewise.
	* config/sparc/litecoff.h: Likewise.

	* config/svr3.h (CTORS_SECTION_ASM_OP): Remove.
	(CTORS_SECTION_FUNCTION, DTORS_SECTION_FUNCTION): Remove.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Remove.
	* config/1750a/1750a.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	* config/a29k/a29k.c: Move include of tree.h.
	* config/a29k/udi.h: Delete file.
	* config/alpha/alpha.c (vms_asm_out_constructor): New.
	(vms_asm_out_destructor): New.
	* config/alpha/vms.h (EXTRA_SECTIONS): No ctors/dtors.
	(EXTRA_SECTION_FUNCTIONS): Likewise.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.
	* config/c4x/c4x.c: Move include of tree.h.
	* config/clipper/clipper.c (clix_asm_out_constructor): New.	
	(clix_asm_out_destructor): New.
	* config/clipper/clix.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.
	* config/i386/aix386.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR): New.
	* config/i386/i386.c (ix86_svr3_asm_out_constructor): New.
	(sco_asm_out_constructor): New.
	* config/i386/sco5.h (TARGET_ASM_CONSTRUCTOR): New.
	* config/i386/svr3gas.h: Remove stack grows up code.
	Remove code duplicated from i386/sysv3.h.
	(TARGET_ASM_CONSTRUCTOR): New.
	(ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): Remove.
	(DTORS_SECTION_FUNCTION, CTORS_SECTION_FUNCTION): Remove.
	* config/i386/sysv3.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR): New.
	* config/m68hc11/m68hc11.c (m68hc11_asm_out_constructor): New.
	(m68hc11_asm_out_destructor): New.
	* config/m68hc11/m68hc11.h (TARGET_ASM_CONSTRUCTOR): New.
	(TARGET_ASM_DESTRUCTOR): New.
	* config/m68k/auxgas.h: Don't undef ASM_OUTPUT_*STRUCTOR.
	* config/m68k/dpx2.h: Properly undef all the bits inherited from
	config/svr3.h pertaining to section manipulation.
	* config/m68k/dpx2g.h: Remove #if 0 code.
	* config/m68k/m68k.c (m68k_svr3_asm_out_constructor): New.
	* config/m68k/tower-as.h (ASM_OUTPUT_SOURCE_LINE): Fix typo.
	(ASM_OUTPUT_CONSTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR): New.
	* config/m88k/m88k.c (m88k_layout_frame): Don't use assign_stack_local.
	(m88k_svr3_asm_out_constructor): New.
	(m88k_svr3_asm_out_destructor): New.
	* config/m88k/sysv3.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.
	* config/mips/mips.h: Remove #if 0 ASM_OUTPUT_*STRUCTOR code.
	* config/rs6000/aix.h: Likewise.
	* config/mips/rtems64.h: Don't undef removed constructor related bits.
	* config/mips/vxworks.h: Likewise.
	* config/rs6000/lynx.h: Likewise.
	* config/sh/elf.h: Likewise.
	* config/rs6000/sysv4.h (CTORS_SECTION_ASM_OP): New.
	(DTORS_SECTION_ASM_OP): New.
	* config/sparc/linux64.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	* config/sparc/sol2-sld-64.h: Likewise.
	* config/vax/vax.c (vms_asm_out_constructor): New.
	(vms_asm_out_destructor): New.
	* config/vax/vms.h (ASM_OUTPUT_CONSTRUCTOR): Remove.
	(ASM_OUTPUT_DESTRUCTOR): Remove.
	(TARGET_ASM_CONSTRUCTOR, TARGET_ASM_DESTRUCTOR): New.

	* doc/tm.texi (@node Initialization): Update.

d-asm-output-constructor.gz