Find a compatible debugger

TestFramework/gnustep-tests.in

@@ -522,11 +522,11 @@ proc_test_log ()
     if present "$GSTESTSUM.tmp" "^Failed test:"
     then
       grep '^Failed test:' "$GSTESTLOG.tmp" | sed -e 's/^Failed test:[^:]*:\([0-9][0-9]*\).*/break testStart if testLineNumber==\1/' > "$GSTESTDBG"
-      DEBUGGER "./obj/$TESTNAME"EXT -x "$GSTESTDBG"
+      $DEBUGGER "./obj/$TESTNAME"$EXT -x "$GSTESTDBG"
       rm -f "$GSTESTDBG"
     elif present "$GSTESTSUM.tmp" "^Failed file:"
     then
-      DEBUGGER "./obj/$TESTNAME"EXT
+      $DEBUGGER "./obj/$TESTNAME"$EXT
     fi
   fi
 

configure.ac

@@ -85,6 +85,17 @@ AC_PROG_OBJCXX
 # We may use egrep for some tests further down below
 AC_PROG_EGREP
 
+AC_MSG_CHECKING([for debugger...])
+# Search for a debugger. We try 'gdb' then 'lldb'.  If
+# we can't find it, we set it to 'gdb', even if that will fail later
+# on.
+AC_CHECK_PROGS(DEBUGGER, [gdb lldb], gdb)
+
+# Used by gnustep-config to output the debugger variable and
+# gnustep-tests.
+AC_MSG_RESULT($DEBUGGER)
+AC_SUBST(DEBUGGER)
+
 #--------------------------------------------------------------------
 # Check if we are using Apple cc
 #--------------------------------------------------------------------

gnustep-config.in

@@ -70,6 +70,8 @@ if [ "$1" = "--help" ]; then
     echo "    --variable=CXX"
     echo "    --variable=OBJCXX"
     echo "    --variable=LDFLAGS"
+    echo "    --variable=EXEEXT"
+    echo "    --variable=DEBUGGER"
     echo "    --variable=GNUMAKE"
     echo "    --variable=GNUSTEP_MAKEFILES"
     echo "    --variable=GNUSTEP_USER_DEFAULTS_DIR"