[PATCH][gdb/contrib] cc-with-tweaks.sh: Create .dwz file in .tmp subdir

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

Hi,

When running a test-case gdb.base/foo.exp with cc-with-dwz-m, a file
build/gdb/testsuite/outputs/gdb.base/foo/foo.dwz will be created, alongside
executable build/gdb/testsuite/outputs/gdb.base/foo/foo.

This can cause problems in f.i. test-cases that test file name completion.

Make these problems less likely by moving foo.dwz to a .tmp subdir:
build/gdb/testsuite/outputs/gdb.base/foo/.tmp/foo.dwz.

Tested on x86_64-linux.

OK for trunk?

Thanks,
- Tom

[gdb/contrib] cc-with-tweaks.sh: Create .dwz file in .tmp subdir

gdb/ChangeLog:

2019-08-22  Tom de Vries  <tdevries@suse.de>

	* contrib/cc-with-tweaks.sh (get_tmpdir): New function.
	Use $tmpdir/$(basename "$output_file").dwz instead of
	"${output_file}.dwz".

---
 gdb/contrib/cc-with-tweaks.sh | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/gdb/contrib/cc-with-tweaks.sh b/gdb/contrib/cc-with-tweaks.sh
index 7df16bc6c1..98c4f89afc 100755
--- a/gdb/contrib/cc-with-tweaks.sh
+++ b/gdb/contrib/cc-with-tweaks.sh
@@ -163,6 +163,12 @@ then
     exit 1
 fi
 
+get_tmpdir ()
+{
+    tmpdir=$(dirname "$output_file")/.tmp
+    mkdir -p "$tmpdir"
+}
+
 if [ "$want_objcopy_compress" = true ]; then
     $OBJCOPY --compress-debug-sections "$output_file"
     rc=$?
@@ -202,17 +208,19 @@ if [ "$want_dwz" = true ]; then
 	;;
     esac
 elif [ "$want_multi" = true ]; then
+    get_tmpdir
+    dwz_file=$tmpdir/$(basename "$output_file").dwz
     # Remove the dwz output file if it exists, so we don't mistake it for a
     # new file in case dwz fails.
-    rm -f "${output_file}.dwz"
+    rm -f "$dwz_file"
 
     cp $output_file ${output_file}.alt
-    $DWZ -m ${output_file}.dwz "$output_file" ${output_file}.alt > /dev/null
+    $DWZ -m "$dwz_file" "$output_file" ${output_file}.alt > /dev/null
     rm -f ${output_file}.alt
 
     # Validate dwz's work by checking if the expected output file exists.
-    if [ ! -f "${output_file}.dwz" ]; then
-	echo "$myname: dwz file ${output_file}.dwz missing."
+    if [ ! -f "$dwz_file" ]; then
+	echo "$myname: dwz file $dwz_file missing."
 	exit 1
     fi
 fi