tce-load -i 

cd libsigc++-2.10.0

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe" ./configure --prefix=/usr/local --disable-static --localstatedir=/var

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make
sudo make install

configure: Deprecated API will be built, for backwards-compatibility.
cancel with --disable-deprecated-api

builds with -std=c++11 anyway