1 |
Am Montag, 16. März 2020, 09:23:49 CET schrieb Michał Górny: |
2 |
> Hi, |
3 |
> |
4 |
> Since 10.0.0 final is around the corner, I'd like to take a minute to |
5 |
> inform developers of packaging changes in Gentoo that affect its |
6 |
> revdeps. Following frequently repeated requests from Gentoo developers |
7 |
> and users, LLVM 10 is stopping to use BUILD_SHARED_LIBS=ON, i.e. split |
8 |
> shared libraries. Instead, we'll be using the 'dylib' model recommended |
9 |
> upstream. |
10 |
> |
11 |
> This means that sys-devel/{llvm,clang} no longer install those small |
12 |
> libLLVM*.so and libclang*.so files. Instead, one big libLLVM-${ver}.so |
13 |
> and libclang-cpp.so.${sover} are installed (yes, I know this historical |
14 |
> inconsistency sucks). Also note that Clang continues installing |
15 |
> libclang.so which is a *C* (not C++) library. |
16 |
> |
17 |
> Most of LLVM revdeps should not have problem with LLVM dylib, as it was |
18 |
> the de-facto standard on other distros. llvm-config handles it |
19 |
> transparently. If you're dealing with a custom build system that |
20 |
> doesn't handle it, it's as simple as trying '-lLLVM' first (note that |
21 |
> you will '-L' due to slotting). |
22 |
> |
23 |
> Clang revdeps may have trouble with clang-cpp library since it's |
24 |
> a fairly recent addition. Again, the solution is simple: '-lclang-cpp' |
25 |
> (repeating: do not confuse it with -lclang which is a different library |
26 |
> for historical reasons). |
27 |
> |
28 |
> sys-devel/lld does not install any libraries anymore. If you ever need |
29 |
> them, please ping me and we'll try to come up with something upstream. |
30 |
> |
31 |
> dev-util/lldb installs liblldb.so. However, I'm not familiar with that |
32 |
> library and I don't know if it has any consumers. |
33 |
> |
34 |
> If you need any help, please don't hesitate to ping me. |
35 |
|
36 |
Hi, |
37 |
|
38 |
when I compile LLVM for myself, I also always choose SHARED_LIBS simply |
39 |
because of RAM usage when linking the libraries. In the past, I was not |
40 |
able to link the single library on my 16 GB machine (I have not tested |
41 |
it now and this could be dependent on other circumstances). What is the |
42 |
current expected RAM usage for LLVM 10? |
43 |
|
44 |
Best, |
45 |
Gerion |