tce-load -i compiletc libmbim-dev gobject-introspection-dev

wget https://www.freedesktop.org/software/libqmi/libqmi-1.26.8.tar.xz

cd libqmi-1.26.8

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 --libexecdir=/usr/local/lib/qmi

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

make [1m 26.74s]
sudo make install

    libqmi 1.26.8
    ==============================================

    Build:
      compiler:                 gcc -flto -mtune=generic -Os -pipe
      cflags:                   -g -O2 -std=gnu89
      ldflags:                  
      warn cflags:              -fno-strict-aliasing -Wnested-externs -Wmissing-prototypes -Wstrict-prototypes -Wdeclaration-after-statement -Wimplicit-function-declaration -Wold-style-definition -Wjump-misses-init -Wall -Wextra -Wundef -Wwrite-strings -Wpointer-arith -Wmissing-declarations -Wredundant-decls -Wno-unused-parameter -Wno-missing-field-initializers -Wformat=2 -Wcast-align -Wformat-nonliteral -Wformat-security -Wsign-compare -Wstrict-aliasing -Wshadow -Winline -Wpacked -Wmissing-format-attribute -Wmissing-noreturn -Winit-self -Wmissing-include-dirs -Wunused-but-set-variable -Warray-bounds -Wreturn-type -Wswitch-enum -Wswitch-default -Wduplicated-cond -Wduplicated-branches -Wlogical-op -Wrestrict -Wnull-dereference -Wdouble-promotion -Wno-error=unused-parameter -Wno-error=missing-field-initializers -Wno-cast-function-type -Wno-packed -Wno-error=cast-function-type -Wno-error=packed
      warn ldflags:             -Wl,--no-as-needed
      Maintainer mode:          yes
      Documentation:            no
      gobject introspection:    yes

    System paths:
      prefix:                   /usr/local
      udev base directory:      /lib/udev

    Features:
      QMUX over MBIM:           yes
      QMI username:             no (root)

    Built items:
      libqrtr-glib:             no
      libqmi-glib:              yes (full)
      qmicli:                   yes
      qmi-firmware-update:      yes
          with udev:                    yes
          with MM runtime check:        yes