[pushed 3/3] [gdb/testsuite] Skip debuginfod tests with cc-with-gnu-debuglink board

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

With test-case gdb.debuginfod/fetch_src_and_symbols.exp and target board
cc-with-gnu-debuglink, we run into:
...
output is objcopy: fetch_src_and_symbols.stripped: \
  debuglink section already exists
FAIL: gdb.debuginfod/fetch_src_and_symbols.exp: no_url: strip debuginfo
ERROR: tcl error sourcing gdb.debuginfod/fetch_src_and_symbols.exp.
ERROR: tcl error code TCL READ VARNAME
ERROR: can't read "debugdir": no such variable
...

In the test-case, the plan is to use gdb_gnu_strip_debug to move the debuginfo
from $binfile to a .debug file, and move it into $debugdir, where debuginfod
will find it.

If we run with target board cc-with-gnu-debuglink, $binfile already doesn't
have any debuginfo anymore, but a .gnu_debuglink pointing to a .debug file in
a .debug dir.  Consequently, gdb_gnu_strip_debug will fail.

We could try to detect this situation and somehow make it work, but it
doesn't seem to be worth the trouble.  The .gnu_debuglink case is tested by
default by this test-case, so there's no need to test it when using the
board.

Fix this by requiring !have_gnu_debuglink.

Likewise in gdb.debuginfod/build-id-no-debug-warning.exp.
---
 gdb/testsuite/gdb.debuginfod/build-id-no-debug-warning.exp | 2 ++
 gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/gdb/testsuite/gdb.debuginfod/build-id-no-debug-warning.exp b/gdb/testsuite/gdb.debuginfod/build-id-no-debug-warning.exp
index eae60901329..362686c87a4 100644
--- a/gdb/testsuite/gdb.debuginfod/build-id-no-debug-warning.exp
+++ b/gdb/testsuite/gdb.debuginfod/build-id-no-debug-warning.exp
@@ -30,6 +30,8 @@ if {[build_executable "build executable" ${testfile} ${srcfile} \
     return
 }
 
+require {!have_gnu_debuglink $binfile}
+
 # Split debug information from BINFILE into BINFILE.debug.
 #
 # By passing the "no-debuglink" flag we prevent this proc from adding
diff --git a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
index e7c2f524abe..518f9d32a94 100644
--- a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
+++ b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
@@ -37,6 +37,8 @@ if { [gdb_compile "$sourcetmp" "$binfile" executable {debug build-id}] != "" } {
     return
 }
 
+require {!have_gnu_debuglink $binfile}
+
 if { [gdb_compile "$sourcetmp" "${binfile}2" executable {debug build-id}] != "" } {
     fail "compile"
     return
-- 
2.51.0