no-multilib -> multilib (theory)

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Hello!

(speaking about x86 and x86_64)

I've read after going no-multilib, there is no way back (at least there=20
is no straight way to do, though hacks exists).

I'm wondering what makes it difficult. The first issue is, gcc can make=20
32bit object files, but the linker cannot create executables as 32bit=20
libgcc.a is missing. On multilib systems, gcc itself is a 64bit=20
executable, only with a few extra 32bit .a and .so files (so effectively =

a cross-compiler on a 64-bit system for 32-bit systems). I didn't try,=20
but I can't see why one couldn't compile a multilib gcc on a=20
non-multilib system. Does linking those extra 32bit .so and .a files=20
require some information from the not-present 32bit libc which causes=20
the problem?


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