File bearssl-compile_flags.patch of Package bearssl

Index: bearssl-0.6/conf/Unix.mk
===================================================================
--- bearssl-0.6.orig/conf/Unix.mk
+++ bearssl-0.6/conf/Unix.mk
@@ -38,7 +38,9 @@ MKDIR = mkdir -p
 
 # C compiler and flags.
 CC = cc
+ifndef CFLAGS
 CFLAGS = -W -Wall -Os -fPIC
+endif
 CCOUT = -c -o 
 
 # Static library building tool.