BUILD: Makefile: add -Wdeclaration-after-statement
This one makes it easier to detect accidentally misplaced variables
declarations in the code which are always a pain to deal with when
functions grow.
diff --git a/Makefile b/Makefile
index 620a2be..052c082 100644
--- a/Makefile
+++ b/Makefile
@@ -118,7 +118,7 @@
#### Compiler-specific flags that may be used to disable some negative over-
# optimization or to silence some warnings. -fno-strict-aliasing is needed with
# gcc >= 4.4.
-SPEC_CFLAGS = -fno-strict-aliasing
+SPEC_CFLAGS = -fno-strict-aliasing -Wdeclaration-after-statement
#### Memory usage tuning
# If small memory footprint is required, you can reduce the buffer size. There