[gdb/contrib] Require minimal dwz version in cc-with-tweaks.sh

I usually run target boards cc-with-dwz and cc-with-dwz-m using a dwz build
from current trunk, but the pathname to the build dir changed and I forgot to
update my test scripts, so the test scripts reverted to using system dwz,
version 0.12.

Consequently, I ran into:
...
(gdb) p ZERO^M
No symbol "ZERO" in current context.^M
(gdb) FAIL: gdb.base/enumval.exp: p ZERO
...
which is due to PR dwz/24468, which was fixed in version 0.13.

Fix this by minimally requiring dwz version 0.13 in cc-with-tweaks.sh, such
that this situation is detected and we get instead:
...
gdb compile failed, cc-with-tweaks.sh: dwz version 0.12 detected, version \
  0.13 or higher required
...

Tested on x86_64-linux, verified with shellcheck.

Approved-By: Tom Tromey <tom@tromey.com>

diff --git a/gdb/contrib/cc-with-tweaks.sh b/gdb/contrib/cc-with-tweaks.sh
index 8add32d54a338160b9b663c0a06704a3dda7a254..62d3bcf97079df6e1c6cb3ef501c0f545eee1cfc 100755 (executable)
--- a/gdb/contrib/cc-with-tweaks.sh
+++ b/gdb/contrib/cc-with-tweaks.sh
@@ -209,6 +209,24 @@ if [ "$want_index" = true ]; then
     [ $rc != 0 ] && exit $rc
 fi
 
+if [ "$want_dwz" = true ] || [ "$want_multi" = true ]; then
+    # Require dwz version with PR dwz/24468 fixed.
+    dwz_version_major_required=0
+    dwz_version_minor_required=13
+    dwz_version_line=$($DWZ --version 2>&1 | head -n 1)
+    dwz_version=${dwz_version_line//dwz version /}
+    dwz_version_major=${dwz_version//\.*/}
+    dwz_version_minor=${dwz_version//*\./}
+    if [ "$dwz_version_major" -lt "$dwz_version_major_required" ] \
+          || { [ "$dwz_version_major" -eq "$dwz_version_major_required" ] \
+                   && [ "$dwz_version_minor" -lt "$dwz_version_minor_required" ]; }; then
+       detected="$dwz_version_major.$dwz_version_minor"
+       required="$dwz_version_major_required.$dwz_version_minor_required"
+       echo "$myname: dwz version $detected detected, version $required or higher required"
+       exit 1
+    fi
+fi
+
 if [ "$want_dwz" = true ]; then
     # Validate dwz's result by checking if the executable was modified.
     cp "$output_file" "${output_file}.copy"