YunQiang Su <[email protected]> 于2019年12月29日周日 下午8:43写道： > > Jun Sun <[email protected]> 于2019年12月29日周日 下午3:33写道： > > > > Thanks for the info, YunQiang. > > > > For simple compiling, I can see "gcc -mabl=32" working well. If we want to > > port complex project and build in 32 bit, we would need to supply CC, AS, > > LD, AR, CXX, etc. Do we just use all the 64bit versions with "-mabi=32"? > > For compiling C++ code, what additional package should we install? > > > > If only stdc++ is needed, install g++-multlib is enough. > > If you need more libraries like boost etc, the best choice for you is > to use mipsel port: > > sudo apt install debootstrap systemd-container > sudo debootstrap sid sid-mipsel http://ftp.cn.debian.org/debian # I > suppose you are in China. > sudo systemd-nspawn -D sid-mipsel > > Or you can have a try of lxc. >
there is another way is that maybe you can have a try multiarch: https://wiki.debian.org/Multiarch/HOWTO > > Cheers. > > > > Jun > > > > > > > > > > On Sat, Dec 28, 2019 at 9:28 PM YunQiang Su <[email protected]> wrote: > >> > >> Jun Sun <[email protected]> 于2019年12月29日周日 上午9:43写道： > >> > > >> > installing g++-mipsel-linux-gnu gives an error below. Any suggestions? > >> > Also, what is the recommended way to set up full 32bit dev environment > >> > on 64bit host if crossbuild is not the one? > >> > > >> > Jun > >> > > >> > root@debian-mips:/home/debian# apt install g++-mipsel-linux-gnu > >> > Reading package lists... Done > >> > Building dependency tree > >> > Reading state information... Done > >> > Package g++-mipsel-linux-gnu is not available, but is referred to by > >> > another package. > >> > This may mean that the package is missing, has been obsoleted, or > >> > is only available from another source > >> > > >> > E: Package 'g++-mipsel-linux-gnu' has no installation candidate > >> > >> Ohh, sorry. you are on a mips64el system... > >> We don't have that compiler, while you can just > >> apt install libc6-dev-mips32 > >> gcc -mabi=32 > >> > >> > > >> > > >> > > >> > On Sat, Dec 28, 2019 at 4:14 PM YunQiang Su <[email protected]> wrote: > >> >> > >> >> Jun Sun <[email protected]> 于2019年12月29日周日 上午5:43写道： > >> >> > > >> >> > re-surfacing my own old thread ... > >> >> > > >> >> > On ARM, I was able to do something really simple to obtain complete > >> >> > 32bit development on a 64bit host: > >> >> > > >> >> > apt install -y build-essential # this install 64bit dev environment > >> >> > apt install -y crossbuild-essential-armhf # this install 32bit > >> >> > cross-dev environment > >> >> > apt install -y libc6:armhf > >> >> > apt install -y libstdc++6:armhf > >> >> > >> >> yep. we don't have the crossbuild-essential-mipsel package. > >> >> While for normal user, it is not useful at all. > >> >> > >> >> crossbuild-essential-armhf depends on g++-arm-linux-gnueabihf && > >> >> gcc-arm-linux-gnueabihf > >> >> > >> >> So, you can do the same thing just by > >> >> apt install g++-mipsel-linux-gnu # gcc-mipsel-linux-gnu is not > >> >> needed, since g++ depeds on gcc. > >> >> > >> >> > > >> >> > However, similar steps don't work on mips64. Specifically it is > >> >> > apparent crossbuild-essential-mipsel dependency is broken, and if > >> >> > you try to fix the dependencies and it ended up conflicting with > >> >> > build-essential. > >> >> > > >> >> > Are there more better way to install a complete 32bit dev environment > >> >> > than what is mentioned earlier in this thread? > >> >> > > >> >> > Thanks! > >> >> > > >> >> > Jun > >> >> > > >> >> > > >> >> > > >> >> > On Sun, May 19, 2019 at 9:10 PM Jun Sun <[email protected]> wrote: > >> >> >> > >> >> >> This is very cool! It worked! Thanks. > >> >> >> > >> >> >> For a complete record here is what I did: > >> >> >>> > >> >> >>> dpkg --add-architecture mipsel > >> >> >>> > >> >> >>> apt-get update > >> >> >>> > >> >> >>> apt-get install gcc-multilib > >> >> >>> > >> >> >>> > >> >> >> > >> >> >> > >> >> >> Earlier I was using "-m32" option which was not recognized. but > >> >> >> -march=mips32 -mabi=32 worked just fine. > >> >> >> > >> >> >> Also, just for the record, if one likes to install 32bit library > >> >> >> later, you would just add ":mipsel" to the package name. For > >> >> >> example, you would do "apt install zlib1g:mipsel" to install 32bit > >> >> >> version of zlib. > >> >> >> > >> >> >> Cheers. > >> >> >> > >> >> >> Jun > >> >> >> > >> >> >> > >> >> >> On Sun, May 19, 2019 at 5:55 PM YunQiang Su <[email protected]> > >> >> >> wrote: > >> >> >>> > >> >> >>> Jun Sun <[email protected]> 于2019年5月20日周一 上午7:42写道： > >> >> >>> > > >> >> >>> > Recently I came across a piece of great work by blahcat who > >> >> >>> > created 64bit MIPSEL debian image that runs on qemu. See > >> >> >>> > https://blahcat.github.io/2017/07/14/building-a-debian-stretch-qemu-image-for-mipsel/ > >> >> >>> > > >> >> >>> > I tried to install multilib in the hope to compile 32bit mips > >> >> >>> > code on this 64bit machine. But it does not seem to work. > >> >> >>> > > >> >> >>> how did you install it? > >> >> >>> it should be done like: > >> >> >>> > >> >> >>> apt-get install libc6-dev-mips32 gcc > >> >> >>> and > >> >> >>> gcc -march=mips32 -mabi=32 xx.c > >> >> >>> > >> >> >>> If your app needs libc only, it is enough. > >> >> >>> > >> >> >>> > Does anybody know for sure whether this is a dead end or just a > >> >> >>> > hiccup which I should overcome? > >> >> >>> > >> >> >>> If your app depends on more libraries, you may need to use an mipsel > >> >> >>> env, or use multiarch. > >> >> >>> https://wiki.debian.org/Multiarch/HOWTO > >> >> >>> > >> >> >>> > > >> >> >>> > Thanks. > >> >> >>> > > >> >> >>> > Jun > >> >> >>> > >> >> >>> > >> >> >>> > >> >> >>> -- > >> >> >>> YunQiang Su > >> >> > >> >> > >> >> > >> >> -- > >> >> YunQiang Su > >> > >> > >> > >> -- > >> YunQiang Su > > > > -- > YunQiang Su -- YunQiang Su
