Index: tools/build/src/engine/build.sh
--- tools/build/src/engine/build.sh.orig
+++ tools/build/src/engine/build.sh
@@ -325,7 +325,7 @@ case "${B2_TOOLSET}" in
 
     gcc|gcc-*)
         CXX_VERSION_OPT=${CXX_VERSION_OPT:---version}
-        B2_CXXFLAGS_RELEASE="-O2 -s"
+        B2_CXXFLAGS_RELEASE=""
         B2_CXXFLAGS_DEBUG="-O0 -g"
     ;;
 
@@ -391,7 +391,7 @@ case "${B2_TOOLSET}" in
 
     clang|clang-*)
         CXX_VERSION_OPT=${CXX_VERSION_OPT:---version}
-        B2_CXXFLAGS_RELEASE="-O3 -s -Wno-deprecated-declarations"
+        B2_CXXFLAGS_RELEASE="-Wno-deprecated-declarations"
         B2_CXXFLAGS_DEBUG="-O0 -fno-inline -g -Wno-deprecated-declarations"
     ;;
 
