tce-load -i itstool gtk3-dev gsettings-desktop-schemas-dev intltool exiv2-dev clutter-gtk-dev lcms2-dev librsvg-dev libsecret-dev libsoup-dev libwebp-dev libraw-dev

cd gthumb-3.4.1

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

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

make
sudo make install

gthumb: symbol lookup error: /usr/local/lib/gthumb/extensions/libexiv2_tools.so: undefined symbol: _ZN5Exiv212ImageFactory4openERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE

Configuration:

        Source code location : .
        Compiler             : gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe
        Prefix               : /usr/local
        CFLAGS               : -g -O2 -fPIC -DPIC -Wl,--as-needed  -Wall -Wall -g -O2 -Wall -Wno-unused 
        Debug                : no
        Run in place         : no
        Build tests          : no
        Exiv2 support        : yes
        JPEG tools           : yes
        TIFF tools           : yes
        Clutter support      : yes
        GStreamer support    : yes
        Use libraw           : yes
        Web services support : no
        Use libsecret        : yes
        Burn disc support    : no
        Web albums           : yes
        Map support          : no
        SVG support          : yes
        WebP support         : yes
        LCMS2 support        : yes