Support CFLAGS_EXTRA to pass extra user-defined compiler flags (MS VC)

(Cherry-pick commit 8be4790 from 'master' branch.)

* src/Makefile.msft: Remove commented out variable assignments.
* src/Makefile.msft (CFLAGS_EXTRA): New variable (empty by default).
* src/Makefile.msft (CFLAGS): Append CFLAGS_EXTRA value.

diff --git a/src/Makefile.msft b/src/Makefile.msft
index 56c0bc3..4a3ff31 100644 (file)
--- a/src/Makefile.msft
+++ b/src/Makefile.msft
@@ -12,11 +12,10 @@
 # To install, copy atomic_ops.h and the atomic_ops/... tree to your favorite
 # include directory.
 
-#MY_CPU=X86
-#CPU=$(MY_CPU)
 #!include <ntwin32.mak>
 
-CFLAGS=-O2 -W3 -DAO_ASSUME_WINDOWS98
+CFLAGS_EXTRA=
+CFLAGS=-O2 -W3 -DAO_ASSUME_WINDOWS98 $(CFLAGS_EXTRA)
 
 LIB_OBJS=atomic_ops.obj atomic_ops_malloc.obj atomic_ops_stack.obj