tce-load -i compiletc meson

wget https://downloads.xiph.org/releases/opus/opus-1.5.2.tar.gz

cd opus-1.5.2

mkdir build
cd build

CC="gcc -flto -march=i486 -mtune=i686 -Os -pipe" CXX="g++ -flto -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain 

ninja [0m 36.29s]
sudo ninja install

opus 1.5.2

  Compiler support
    C99 var arrays                 : YES
    C99 lrintf                     : YES
    Use alloca                     : NO (using C99 variable-size arrays instead)

  Optimizations
    Floating point support         : YES
    Fast float approximations      : NO
    Fixed point debugging          : NO
    Inline assembly optimizations  : none
    External assembly optimizations: none
    Intrinsics optimizations       : SSE, SSE2, SSE4.1, AVX2
    Run-time CPU detection         : SSE, SSE2, SSE4.1, AVX2

  General configuration
    Custom modes                   : NO
    Assertions                     : NO
    Hardening                      : YES
    Fuzzing                        : NO
    Check ASM                      : NO
    API documentation              : NO
    Extra programs                 : YES
    Tests                          : YES

  User defined options
    buildtype                      : plain
    localstatedir                  : /var
    prefix                         : /usr/local