Dear GCC colleagues,
I managed to build GCC 7.1.0 on Raspberry Pi 3 (Raspbian GNU/Linux 8
(jessie), GCC 4.9.2). It required combination of specific configuration
flags:
--with-cpu=cortex-a53 --with-fpu=neon-fp-armv8 --with-float=hard
--build=arm-linux-gnueabihf --host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf --disable-bootstrap
By the way, if it's of any interest, I also automated such customized
builds using Collective Knowledge workflow framework:
$ sudo pip install ck
$ ck pull repo:ck-dev-compilers
$ ck install package:compiler-gcc-any-src-linux-no-deps
--env.PARALLEL_BUILDS=1 --env.GCC_COMPILE_CFLAGS=-O0
--env.GCC_COMPILE_CXXFLAGS=-O0 --env.EXTRA_CFG_GCC=--disable-bootstrap
--env.RPI3=YES
This also allowed us to autotune GCC 7.1.0 across shared programs/data
sets and collect some "interesting" combinations of optimization flags here:
* http://tinyurl.com/k4jlwq5
If you build GCC via CK as above, you are welcome to participate in
collaborative optimization and share stats for your platforms/compiler
as following:
$ ck crowdsource program.optimization --iterations=80 --repetitions=3
--scenario=8289e0cf24346aa7ck
Cheers,
Grigori
