[PATCH 0/4] drop version checks for in-tree gas [PR91602]

[Serge Belyshev]

Special-casing checks for in-tree gas features is unnecessary since
r100007 which made configure-gcc depend on all-gas, and thus making
alternate code path in gcc_GAS_CHECK_FEATURE for in-tree gas
redundant.

Along the way this fixes PR 91602, which is caused by incorrect guess
of leb128 support presense in RISC-V.

First patch removes alternate code path in gcc_GAS_CHECK_FEATURE and
related code, the rest are further cleanups.  Patches 2 and 3 in
series make no functional changes, thus configure is unchanged.

Bootstrapped/regtested on x86_64-pc-linux-gnu, riscv64-unknown-linux-gnu,
sparc-sun-solaris2.11 and powerpc-ibm-aix7.{1.5.0,2.4.0}, with and without
in-tree binutils (except on aix where combined tree does not appear to work
due to dynamic linker peculiarity).

OK for mainline ?

Serge Belyshev (4):
  configure: drop version checks for in-tree gas [PR91602]
  configure: remove version argument from gcc_GAS_CHECK_FEATURE
  configure: fixup formatting from previous change
  configure: remove gas versions from tls check

 gcc/acinclude.m4 |  82 +-------
 gcc/configure    | 472 ++++++-----------------------------------------
 gcc/configure.ac | 335 ++++++++++++---------------------
 3 files changed, 188 insertions(+), 701 deletions(-)