Jun Sun <[email protected]> 于2019年12月30日周一 上午6:01写道： > > Multiarch is the first thing I tried. It generally works in terms of adding > foreign architecture, finding/install packages with proper dependencies, > runtime support, linkers and etc. The only thing seemingly broken is the > crossbuild-essential-mipsel, (or build-essential:mipsel, I think), which is > needed to develop 32bit in this multiarch environment. See my earlier email > on this. >
Sorry. My stack is toooo shallow. build-essential make no sense for normal user at all. It is used to make sbuild/pbuilder happier. In fact you should not install crossbuild-essential-* manually at all. > I think multiarch is the future for debian. We should get it working on > 64bit MIPS. It does not seem too far to fix it. From surface, the > crossbuild has some unnecessary conflict with native build essential package. > Maybe removing those should be fine? In fact it is too hard to fix. For a suggestion, the normal user should choose only on from mutlilib and multiarch. For example, if you want to use multiarch, you'd have to purge multilib packages. > > Cheers. > > Jun > > > On Sun, Dec 29, 2019 at 4:59 AM YunQiang Su <[email protected]> wrote: >> >> 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 -- YunQiang Su
