Reading https://wiki.ubuntu.com/MultiarchSpec , I feel to understand the `--enable-targets` option too should be considered for the purpose of this topic. The above link says: > The current handling of 32-bit software on the amd64 architecture > is unwieldy in the extreme. A handful of libraries are packaged as > "biarch" packages, building -386 variants using gcc -m32; most do > not, and as a result are only available if they're included in ia32-libs, > a monstrous source package […] That indirectly refers `--enable-targets`, isn't it? Or I am erroneously understanding? -- View this message in context: http://gcc.1065356.n5.nabble.com/Multiarch-vs-Multilib-documentations-tp931743p931759.html Sent from the gcc - Help mailing list archive at Nabble.com.