[gdb/testsuite] Fix regression in step-indirect-call-thunk.exp with gcc 7
commit9d9dd861e9815829124a4413f0446e3bcc119dca
authorTom de Vries <tdevries@suse.de>
Mon, 18 Jul 2022 04:13:45 +0000 (18 06:13 +0200)
committerTom de Vries <tdevries@suse.de>
Mon, 18 Jul 2022 04:13:45 +0000 (18 06:13 +0200)
tree7d9b46587e9d43608ab4fd83dc7a80dbc7e76720
parent68a5118c481da16f81874a92f4daaab4dcdc5d89
[gdb/testsuite] Fix regression in step-indirect-call-thunk.exp with gcc 7

Since commit 43127ae5714 ("Fix gdb.base/step-indirect-call-thunk.exp") I run
into:
...
gdb compile failed, gcc: error: unrecognized command line option \
  '-fcf-protection=none'; did you mean '-flto-partition=none'?
UNTESTED: gdb.base/step-indirect-call-thunk.exp: failed to prepare
...

The problem is that -fcf-protection is supported starting gcc 8, but I'm using
system gcc 7.5.0.

Fix this by only adding -fcf-protection=none for gcc 8 and later.

Tested on x86_64-linux, with gcc 7.5.0, 8.2.1 and 12.1.1.
gdb/testsuite/gdb.base/step-indirect-call-thunk.exp
gdb/testsuite/lib/gdb.exp