--- boost_1_73_0/tools/build/src/engine/build.sh~	2020-04-25 17:09:03.159419899 +0100

+++ boost_1_73_0/tools/build/src/engine/build.sh	2020-04-25 17:11:35.085907844 +0100

@@ -233,7 +233,7 @@

         *)

         B2_CXX="${CXX} -x c++ -std=c++11"

-        B2_CXXFLAGS_RELEASE="-O2 -s"

+        B2_CXXFLAGS_RELEASE="${RPM_OPT_FLAGS} ${RPM_LD_FLAGS}"

         B2_CXXFLAGS_DEBUG="-O0 -g"

         esac

     ;;