gcc/clang interoperability problem with a custom "samba" build in recent -current.

[Julian Elischer]

I would really like ot get some pointers as to who are our tools 
committers at the moment, in particular who might know about these issues.
The main issue for me at the moment is the ability to compile the 
aesni code in Samba from clang..

Julian


On 20/7/18 7:32 pm, Julian Elischer wrote:
> compiling our samba with gcc 4.2.1 in 12 gave us some off behaviour 
> when lld became the linker I think..
>
> 1/ linking needed some directories added to some of the build 
> scripts because previously apparently it looked in $SYSROOT/usr/lib 
> by default and now it doesn't.
>
> 2/ compiling our samba produces a libtdb.so that has various symbols 
> in it, (according to nm(1) ), but when we try link against it we get 
> complaints about those symbols not being defined.
>
> 3/ an attempt to switch to using clang to compile everything leads to:
>
>
> "--aes-accel=intelaesni selected and compiler rejects -Wp,-E,-lang-asm.
>
> One wonders whether there is a clang equivalent of "-Wp,-E,-lang-asm"
>
> The AES acceleration is a configure option for the samba package.
>
> Apparently turning it on requires -Wp,-E,-lang-asm.
>
> which apparently gcc 4.2.1 has, but clang doesn't have.
>
>    FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based
>    on LLVM 6.0.1)
>    Target: x86_64-unknown-freebsd12.0
>    Thread model: posix
>    InstalledDir: /usr/bin
>
> anyone know if there is a clang equivalent of -Wp, -E,-lang-asm?
>
> possible work arrounds include:
>
> 1/ Get gcc/lld to produce a library from which lld can find the symbols
>
> 2/ find a way to compile this with clang but everything else with gcc?
>
> 3/ find a way to allow clang to use
> -Wp,-E,-lang-asm
>
> whatever that means
>
>
> Thoughts from any tools people?
>
> Julian
>
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