diff -urp qemu-2.12.0.orig/configure qemu-2.12.0/configure
--- qemu-2.12.0.orig/configure	2018-05-01 18:42:52.740082920 +0000
+++ qemu-2.12.0/configure	2018-05-01 18:44:59.949081487 +0000
@@ -535,10 +535,6 @@ QEMU_CFLAGS="-Wall -Wundef -Wwrite-strin
 QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
 QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
 QEMU_INCLUDES="-iquote . -iquote \$(SRC_PATH) -iquote \$(SRC_PATH)/accel/tcg -iquote \$(SRC_PATH)/include"
-if test "$debug_info" = "yes"; then
-    CFLAGS="-g $CFLAGS"
-    LDFLAGS="-g $LDFLAGS"
-fi
 
 # make source path absolute
 source_path=$(cd "$source_path"; pwd)
@@ -5420,12 +5416,8 @@ fi
 write_c_skeleton
 
 if test "$gcov" = "yes" ; then
-  CFLAGS="-fprofile-arcs -ftest-coverage -g $CFLAGS"
+  CFLAGS="-fprofile-arcs -ftest-coverage $CFLAGS"
   LDFLAGS="-fprofile-arcs -ftest-coverage $LDFLAGS"
-elif test "$fortify_source" = "yes" ; then
-  CFLAGS="-O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 $CFLAGS"
-elif test "$debug" = "no"; then
-  CFLAGS="-O2 $CFLAGS"
 fi
 
 if test "$have_asan" = "yes"; then