[Bug gas/23451] New: RISC-V gas aborts with "Error: unknown default architecture `'" in GCC configure tests

[address@hidden]

https://sourceware.org/bugzilla/show_bug.cgi?id=23451

            Bug ID: 23451
           Summary: RISC-V gas aborts with "Error: unknown default
                    architecture `'" in GCC configure tests
           Product: binutils
           Version: 2.31
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: address@hidden
  Target Milestone: ---

I tried to build a riscv-rtems5 GCC using Binutils 2.31.1 and a recent GCC 9.
There are several configure tests in GCC which test gas features. They fail now
with a "Error: unknown default architecture `'" error message (about 30 tests),
e.g.

configure:24456: checking assembler for thread-local storage support
configure:24469: /build/rtems/5/riscv-rtems5/bin/as   --fatal-warnings -o
conftest.o conftest.s >&5
Assembler messages:
Error: unknown default architecture `'
configure:24472: $? = 1
configure: failed program was

        .section .tdata,"awT",@progbits
x:      .word 2
        .text
        la.tls.gd a0,x
        call __tls_get_addr

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