Hi Richard,

On Fri, 2021-09-10 08:02:00 +0200, Richard Biener via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> > On 9/9/2021 7:19 AM, Richard Biener via Gcc-patches wrote:
> > > The patch also removes the PREFERRED_DEBUGGING_TYPE define from
> > > lynx.h which always follows elfos.h already defaulting to DWARF,
> > > so the comment about STABS being the default is misleading and
> > > outdated.  There's no listed maintainer for Lynx OS.
> > >
> > > I have not tested this in any ways but I also have no idea how
> > > to meaningfully do so.

I'm not actually running such a configuration and cannot properly test
it, but automated mass-building broke for --target=i686-lynxos:

[all 2021-09-13 00:17:48] /usr/lib/gcc-snapshot/bin/g++ -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../gcc/gcc -I../../gcc/gcc/build -I../../gcc/gcc/../include  -I../../gcc/gcc/../libcpp/include  \
[all 2021-09-13 00:17:48]  -o build/genconstants.o ../../gcc/gcc/genconstants.c
[all 2021-09-13 00:17:49] /usr/lib/gcc-snapshot/bin/g++   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -fno-PIE -static-libstdc++ -static-libgcc  -no-pie -o build/genconstants \
[all 2021-09-13 00:17:49]     build/genconstants.o build/read-md.o build/errors.o ../build-x86_64-pc-linux-gnu/libiberty/libiberty.a
[all 2021-09-13 00:17:49] build/genconstants ../../gcc/gcc/common.md ../../gcc/gcc/config/i386/i386.md \
[all 2021-09-13 00:17:49]    > tmp-constants.h
[all 2021-09-13 00:17:49] /bin/bash ../../gcc/gcc/../move-if-change tmp-constants.h insn-constants.h
[all 2021-09-13 00:17:49] echo timestamp > s-constants
[all 2021-09-13 00:17:49] /usr/lib/gcc-snapshot/bin/g++ -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../gcc/gcc -I../../gcc/gcc/build -I../../gcc/gcc/../include  -I../../gcc/gcc/../libcpp/include  \
[all 2021-09-13 00:17:49]  -o build/genpreds.o ../../gcc/gcc/genpreds.c
[all 2021-09-13 00:17:49] In file included from ./tm.h:37,
[all 2021-09-13 00:17:49]                  from ../../gcc/gcc/genpreds.c:26:
[all 2021-09-13 00:17:49] ../../gcc/gcc/defaults.h:910:2: error: #error You must define PREFERRED_DEBUGGING_TYPE
[all 2021-09-13 00:17:49]   910 | #error You must define PREFERRED_DEBUGGING_TYPE
[all 2021-09-13 00:17:49]       |  ^~~~~
[all 2021-09-13 00:17:50] make[1]: *** [Makefile:2831: build/genpreds.o] Error 1
[all 2021-09-13 00:17:50] make[1]: Leaving directory '/var/lib/laminar/run/gcc-i686-lynxos/8/toolchain-build/gcc'
[all 2021-09-13 00:17:50] make: *** [Makefile:4423: all-gcc] Error 2

Thanks,
  Jan-Benedict

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