[pushed] [gdb/testsuite] Require compilation flags in two gdb.arch/aarch64 test-cases

[Tom de Vries <tdevries@suse.de>]

With test-cases gdb.arch/aarch64-mte-core.exp and gdb.arch/aarch64-pauth.exp I
run into compilation errors due to unsupported compilation flags.

Fix this by requiring the compilation flags, such that I have instead:
...
UNSUPPORTED: gdb.arch/aarch64-mte-core.exp: require failed: \
  have_compile_flag -march=armv8.5-a+memtag
UNSUPPORTED: gdb.arch/aarch64-pauth.exp: require failed: \
  have_compile_flag -mbranch-protection=pac-ret+leaf
...

Tested on aarch64-linux.
---
 gdb/testsuite/gdb.arch/aarch64-mte-core.exp | 2 ++
 gdb/testsuite/gdb.arch/aarch64-pauth.exp    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/gdb/testsuite/gdb.arch/aarch64-mte-core.exp b/gdb/testsuite/gdb.arch/aarch64-mte-core.exp
index dde5df47b1a..6127ffb302b 100644
--- a/gdb/testsuite/gdb.arch/aarch64-mte-core.exp
+++ b/gdb/testsuite/gdb.arch/aarch64-mte-core.exp
@@ -166,6 +166,8 @@ proc test_mode { mode } {
 
 require is_aarch64_target
 
+require {have_compile_flag -march=armv8.5-a+memtag}
+
 # Run tests
 foreach_with_prefix mode {"sync" "async"} {
     test_mode $mode
diff --git a/gdb/testsuite/gdb.arch/aarch64-pauth.exp b/gdb/testsuite/gdb.arch/aarch64-pauth.exp
index d0dfaf96900..36d8e722072 100644
--- a/gdb/testsuite/gdb.arch/aarch64-pauth.exp
+++ b/gdb/testsuite/gdb.arch/aarch64-pauth.exp
@@ -19,6 +19,8 @@
 
 require is_aarch64_target
 
+require {have_compile_flag -mbranch-protection=pac-ret+leaf}
+
 # Build program with address signing forced on.
 standard_testfile
 set compile_flags {debug}

base-commit: 2ef339e38f51906a394105fe545058fec1f9bc4a
-- 
2.35.3