* [gentoo-dev-announce] Packaging changes in LLVM 10
@ 2020-03-16 8:23 Michał Górny
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From: Michał Górny @ 2020-03-16 8:23 UTC (permalink / raw
To: gentoo-dev-announce; +Cc: gentoo-dev
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Hi,
Since 10.0.0 final is around the corner, I'd like to take a minute to
inform developers of packaging changes in Gentoo that affect its
revdeps. Following frequently repeated requests from Gentoo developers
and users, LLVM 10 is stopping to use BUILD_SHARED_LIBS=ON, i.e. split
shared libraries. Instead, we'll be using the 'dylib' model recommended
upstream.
This means that sys-devel/{llvm,clang} no longer install those small
libLLVM*.so and libclang*.so files. Instead, one big libLLVM-${ver}.so
and libclang-cpp.so.${sover} are installed (yes, I know this historical
inconsistency sucks). Also note that Clang continues installing
libclang.so which is a *C* (not C++) library.
Most of LLVM revdeps should not have problem with LLVM dylib, as it was
the de-facto standard on other distros. llvm-config handles it
transparently. If you're dealing with a custom build system that
doesn't handle it, it's as simple as trying '-lLLVM' first (note that
you will '-L' due to slotting).
Clang revdeps may have trouble with clang-cpp library since it's
a fairly recent addition. Again, the solution is simple: '-lclang-cpp'
(repeating: do not confuse it with -lclang which is a different library
for historical reasons).
sys-devel/lld does not install any libraries anymore. If you ever need
them, please ping me and we'll try to come up with something upstream.
dev-util/lldb installs liblldb.so. However, I'm not familiar with that
library and I don't know if it has any consumers.
If you need any help, please don't hesitate to ping me.
--
Best regards,
Michał Górny
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