[FL-2052] New build system based on scons (#1269)

site_scons/site_tools/gdb.py

@@ -0,0 +1,33 @@
+from SCons.Builder import Builder
+from SCons.Action import Action
+
+
+def generate(env):
+    env.SetDefault(
+        GDB="gdb",
+        GDBPY="gdb-py",
+        GDBOPTS="",
+        GDBPYOPTS="",
+        GDBCOM="$GDB $GDBOPTS $SOURCES",  # no $TARGET
+        GDBPYCOM="$GDBPY $GDBOPTS $GDBPYOPTS $SOURCES",  # no $TARGET
+    )
+    env.Append(
+        BUILDERS={
+            "GDB": Builder(
+                action=Action(
+                    "${GDBCOM}",
+                    "${GDBCOMSTR}",
+                ),
+            ),
+            "GDBPy": Builder(
+                action=Action(
+                    "${GDBPYCOM}",
+                    "${GDBPYCOMSTR}",
+                ),
+            ),
+        }
+    )
+
+
+def exists(env):
+    return True