Index: dd_rescue-1.99.14/configure.ac
===================================================================
--- dd_rescue-1.99.14.orig/configure.ac
+++ dd_rescue-1.99.14/configure.ac
@@ -46,8 +46,8 @@ CC_FLAGS_CHECK(-mavx2,AVX2)
 CC_FLAGS_CHECK(-mrdrnd,RDRND)
 CC_FLAGS_CHECK(-maes,AES)
 
-#CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2 -fPIE -pie -rdynamic"
-CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2 -fPIE"
+#CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIE -pie -rdynamic"
+CFLAGS="$CFLAGS -fPIE"
 dnl ***************************************************************************
 dnl Check for support of rep nop
 AC_MSG_CHECKING(whether asm rep nop is supported)