Ancient coastline GCC won't build for MIPS

[Jakub Jermář]

The mips build of gcc errs with the following error:

mips-helenos-cc   -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wc++-compat   -DHAVE_CONFIG_H  -o xgcc gcc.o opts-common.o gcc-options.o diagnostic.o pretty-print.o input.o vec.o ggc-none.o \
  gccspec.o intl.o prefix.o version.o  ../libcpp/libcpp.a  -liconv ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a 
/usr/local/cross/lib/gcc/mips-helenos/8.2.0/../../../../mips-helenos/bin/ld: gcc.o:(.data.rel.ro+0x74): undefined reference to `host_detect_local_cpu'

​This comment here suggests that gcc thinks it is building natively on a mips system. Also see ​helenos.h.

[Jiří Zárevúcky]

The issue here is that the ancient coastline GCC is not patched enough for MIPS. Coincidentally, HelenOS/gcc had the same issue, but it only occurs when cross-compiling a native compiler (as opposed to native-compiling a cross-compiler, which is what we do normally).

I fixed it in our GCC 8.2 (which currently doesn't make any difference), but to fix coastline GCC that one needs to be patched as well. Frankly, I don't think it's worth the effort, and the coastline GCC should probably remain broken until the package is updated to use our most recent git version. But if someone else feels like it's worthwhile to be fixing the old one, feel free. Just applying the same fix to gcc/config/mips/gnu-user.h should do the trick.

Otherwise, wontfix.