GCCcore-6.4.0.eb fails with Error: unknown .loc sub-directive `view'

[stevenvdb]

Compiling gcc fails with error:

recommended isl version is 0.16 or 0.15, the minimum required isl version 0.14 is deprecated
checking for isl 0.16 or 0.15... no
*** This configuration is not supported in the following subdirectories:
     gnattools gotools target-libada target-libgo target-libffi target-zlib target-libjava target-libobjc target-liboffloadmic target-boehm-gc
    (Any other directories should still work fine.)
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s: Assembler messages:
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:11: Error: unknown .loc sub-directive `view'
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:11: Error: junk at end of line, first unrecognized character is `-'
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:13: Error: unknown .loc sub-directive `view'
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:13: Error: unknown pseudo-op: `.lvu1'
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:14: Error: unknown .loc sub-directive `view'
/tmp/eb-j2xgtx4w/eb-jki7lu51/ccsxayaS.s:14: Error: unknown pseudo-op: `.lvu2'
*** The command 'gcc -o conftest -g -O2   conftest.c' failed.
*** You must set the environment variable CC to a working compiler.

This turns out to be due to an incompatibility of the assembler from binutils with the system gcc. The solution is therefore to use a newer binutils version as a build dependency, as done in 6224cf5

This probably has little side effects, since the binutils build dependency is only used when bootstrapping. Once GCCcode-6.4.0.eb is installed, you can use that gcc to install a module binutils/2.28-GCCcore-6.4.0 which is used further in the toolchain. When compiling software afterwards, I often see messages like:
ld: /vsc-hard-mounts/leuven-apps/rocky8/skylake-6132/2018a/software/GCCcore/6.4.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.4.0//libgcc.a(_muldi3.o): unable to initialize decompress status for section .debug_info
which might be coming from here. Although annyoing, the seem harmless.

Additionally you hit an error when compiling libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc because <sys/ustat.h> has been removed from recent glibc versions. A patch is provided at https://reviews.llvm.org/rG383fe5c8668f63ef21c646b43f48da9fa41aa100 which is also included in 6224cf5