build: use -fno-rtti -fno-exceptions

build-example.sh

diff --git a/build-example.sh b/build-example.sh
index 0d212fc..0fc7ea4 100755
--- a/build-example.sh
+++ b/build-example.sh
@@ -24,8 +24,8 @@
 
 # The "-fdata-sections -ffunction-sections -Wl,--gc-sections" produces smaller
 # binaries. See commit 41fce8a8 "Strip examples of unused data and functions".
-CFLAGS=${CFLAGS:--O3 -fdata-sections -ffunction-sections -Wall -Wl,--gc-sections}
-CXXFLAGS=${CXXFLAGS:--O3 -fdata-sections -ffunction-sections -Wall -Wl,--gc-sections}
+CFLAGS=${CFLAGS:--O3     -fdata-sections -ffunction-sections                           -Wall -Wl,--gc-sections}
+CXXFLAGS=${CXXFLAGS:--O3 -fdata-sections -ffunction-sections -fno-rtti -fno-exceptions -Wall -Wl,--gc-sections}
 
 mkdir -p gen/bin