diff --git a/toolchain.sh b/toolchain.sh
index f5ee2db..8ce1387 100755
--- a/toolchain.sh
+++ b/toolchain.sh
@@ -12,13 +12,6 @@ PREFIX="$2"
 TARGET=$1
 NJOBS=-j"$(nproc)"
 PATH=$PATH:$PREFIX/bin
-export CFLAGS="-w"
-export CXXFLAGS="-w"
-export CFLAGS_FOR_TARGET="-m64 -O3 -fPIE"
-export GOFLAGS_FOR_TARGET="-m64 -O3 -fPIE"
-export FCFLAGS_FOR_TARGET="-m64 -O3 -fPIE"
-export FFLAGS_FOR_TARGET="-m64 -O3 -fPIE"
-export CXXFLAGS_FOR_TARGET="-m64 -O3 -fPIE"
 
 echo "Build bootstrap toolchain for $TARGET with $NJOBS jobs for $PREFIX"