hi,
> There remains to understand why Bruce has an error with libffi. There is no
> mention of libffi in my rust build log.
I routinely build rustc vs system llvm
I had no problems building rustc-1.25.0 vs llvm-6.0
I saw the "undefined symbol: ffi_type_float" error quite a long ago with
1.17.0 and it was fixed by:
export RUSTFLAGS="$RUSTFLAGS -C link-args=-lffi"
(which, BTW, I got from BLFS)
Since then, I left it in my install script, so may be it is still
needed: didn't try to run without it for 1.25.0, though.
Also, I see this in my install script, when using config.toml:
# ESSENTIAL for linking against llvm shared libs
# this is the equivalent of --enable-llvm-link-shared when using configure
export LLVM_LINK_SHARED=1
Don't remember where I got that, perhaps here:
https://github.com/rust-lang/rust/issues/46995
ciao
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