tce-load -i compiletc intltool polkit-dev gobject-introspection-dev vala-dev libqmi-dev

wget https://www.freedesktop.org/software/ModemManager/ModemManager-1.6.14.tar.xz

cd ModemManager-1.6.14

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --disable-static --with-polkit=permissive --with-systemd-journal=no 

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

make [2m 9.31s]
sudo make install

    ModemManager 1.6.14
    ==============================================

    Build:
      compiler:                gcc -flto -mtune=generic -Os -pipe
      cflags:                  -Wall -Werror -std=gnu89 -g -O2 -Wmissing-declarations -Wmissing-prototypes -Wdeclaration-after-statement -Wno-unused-parameter -Wno-sign-compare -Wno-deprecated-declarations -Wno-incompatible-pointer-types -Wno-unused-but-set-variable -Wformat-security
      ldflags:                 
      maintainer mode:         yes

    System paths:
      prefix:                  /usr/local
      D-Bus system directory:  ${prefix}/etc/dbus-1/system.d
      udev base directory:     /lib/udev
      systemd unit directory:  

    Features:
      policykit support:       permissive
      mbim support:            yes
      qmi support:             yes
      suspend/resume support:  no

    Miscellaneous:
      gobject introspection:   yes
      vala bindings:           yes
      documentation:           no
      code coverage:           no