https://www.linuxtut.com/en/bec24db4a5a41db02895/
cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local \
-DCMAKE_BUILD_TYPE=MinSizeRel \
-DBUILD_SHARED_LIBS='ON' \
-DCMAKE_C_FLAGS='-mtune=generic -pipe'

# likely requires serious computing power to build it fast
time make -j16
real    4m 6.68s
user    56m 32.61s
sys     4m 45.34s