Bug#926751: gcc-riscv64-linux-gnu: Doesn't work with all valid abi combinations.

[peterc <peter.chubb@data61.csiro.au>]

Package: gcc-riscv64-linux-gnu
Version: 4:8.3.0-2
Severity: normal

Dear Maintainer,


My RISC V64 implementation doesn't have floating point, so I'm trying
to compile with
 -march=rv64imac -mabi=lp64

I see:
$  riscv64-linux-gnu-gcc -mabi=lp64 -march=rv64imac x.c
In file included from /usr/riscv64-linux-gnu/include/features.h:448,
                 from /usr/riscv64-linux-gnu/include/bits/libc-header-start.h:3,
                 from /usr/riscv64-linux-gnu/include/stdio.h:27,
                 from x.c:1:
/usr/riscv64-linux-gnu/include/gnu/stubs.h:8:11: fatal error: gnu/stubs-lp64.h: No such file or directory
 # include <gnu/stubs-lp64.h>
 compilation terminated.

for a simple hello world program.

It looks as if only march=rv64imafdc/mabi=lp64d is supported; please
can the other valid combinations be supported as well?

The current list is:

march=rv32i/mabi=ilp32
march=rv32im/mabi=ilp32
march=rv32iac/mabi=ilp32
march=rv32imac/mabi=ilp32
march=rv32imafc/mabi=ilp32f
march=rv64imac/mabi=lp64
march=rv64imafdc/mabi=lp64d

Peter C

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: armhf, armel, i386, powerpc, arm64, riscv64

Kernel: Linux 5.0.0-rc4-00001-g4aa9fc2a435a (SMP w/8 CPU cores)
Locale: LANG=en_AU.utf8, LC_CTYPE=en_AU.utf8 (charmap=UTF-8), LANGUAGE=en_AU:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gcc-riscv64-linux-gnu depends on:
ii  cpp-riscv64-linux-gnu    4:8.3.0-2
ii  gcc-8-riscv64-linux-gnu  8.3.0-4cross2

Versions of packages gcc-riscv64-linux-gnu recommends:
ii  libc6-dev-riscv64-cross [libc-dev-riscv64-cross]  2.28-7cross1

Versions of packages gcc-riscv64-linux-gnu suggests:
ii  autoconf               2.69-11
ii  automake               1:1.16.1-4
ii  bison                  2:3.3.2.dfsg-1
ii  flex                   2.6.4-6.2
ii  gcc-doc                5:7.2.0-2
pn  gdb-riscv64-linux-gnu  <none>
ii  libtool                2.4.6-10
ii  make                   4.2.1-1.2
ii  manpages-dev           4.16-1

-- no debconf information