On Tue, 2021-09-21 16:25:19 +0200, Richard Biener via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> This makes defaults.h choose DWARF2_DEBUG if PREFERRED_DEBUGGING_TYPE
> is not specified by the target and errors out if DWARF DWARF is not supported.

While I think the pdp11 bits arreved, the rest did not (yet). Just
checked my auto-builder logs. When building current HEAD as

	../gcc/configure --prefix=... --enable-werror-always \
		--enable-languages=all --disable-gcov \
		--disable-shared --disable-threads --without-headers \
		--target=...
	make V=1 all-gcc

ALL of these targets won't build right now:
	aarch64-elf
	aarch64-rtems
	alpha64-dec-vms
	alpha-dec-vms
	arm-eabi
	arm-rtems
	arm-symbianelf
	arm-uclinux_eabi
	bfin-elf
	bfin-rtems
	bfin-uclinux
	c6x-elf
	c6x-uclinux
	cris-elf
	fido-elf
	fr30-elf
	ft32-elf
	i686-elf
	i686-lynxos
	i686-nto-qnx
	i686-pc-msdosdjgpp
	i686-rtems
	i686-wrs-vxworks
	i686-wrs-vxworksae
	lm32-elf
	lm32-rtems
	lm32-uclinux
	m32c-elf
	m68k-elf
	m68k-rtems
	m68k-uclinux
	moxie-elf
	moxie-rtems
	moxie-uclinux
	powerpc-eabi
	powerpc-eabialtivec
	powerpc-eabisim
	powerpc-eabisimaltivec
	powerpc-ibm-aix7.1
	powerpc-ibm-aix7.2
	powerpcle-eabi
	powerpcle-eabisim
	powerpcle-elf
	powerpc-lynxos
	powerpc-rtems
	powerpc-wrs-vxworks
	powerpc-wrs-vxworksmils
	powerpc-xilinx-eabi
	ppc-elf
	s390x-ibm-tpf
	sh-elf
	sh-rtems
	sh-superh-elf
	sh-wrs-vxworks
	sparc64-elf
	sparc64-rtems
	sparc-elf
	sparc-leon-elf
	sparc-rtems
	sparc-wrs-vxworks
	visium-elf
	x86_64-elf --with-fpmath=sse
	x86_64-rtems
	xtensa-elf

So I'd like to reignite the discussion about a DWARF2 fallback. :)

Thanks,
  Jan-Benedict

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