I usually build my LLVM toolchain using the following (at least up to a month ago it worked). But on a new install it won't: $ echo 'sys-devel/clang default-compiler-rt default-libcxx static-analyzer WebAssembly' > /etc/portage/package.use/sys-devel_clang $ echo 'sys-devel/clang-runtime compiler-rt -crt libcxx openmp sanitize' > /etc/portage/package.use/sys-devel_clang-runtime $ echo 'sys-devel/llvm -exegesis gold libedit libffi ncurses sanitize xar xml WebAssembly' > /etc/portage/package.use/sys-devel_llvm $ echo 'sys-libs/compiler-rt clang' > /etc/portage/package.use/sys-libs_compiler-rt $ echo 'sys-libs/libcxx libcxxabi -libcxxrt -libunwind' > /etc/portage/package.use/sys-libs_libcxx $ echo 'sys-libs/libcxxabi -libunwind' > /etc/portage/package.use/sys-libs_libcxxabi $ echo 'sys-libs/libunwind debug-frame -libatomic lzma static-libs' > /etc/portage/package.use/sys-libs_libunwind # static libs are required with libs that statically depend on libunwind $ echo 'app-arch/xz-utils static-libs' > /etc/portage/package.use/app-arch_xz-utils $ emerge -atuv sys-devel/llvm sys-devel/clang dev-util/lldb sys-devel/lld $ emerge -1atv app-arch/xz-utils sys-libs/zlib Then, doing: $ emerge -auDN @world These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild N ] sys-libs/compiler-rt-sanitizers-13.0.1 USE="asan cfi clang dfsan gwp-asan hwasan libfuzzer lsan memprof msan orc profile safestack scudo tsan ubsan xray -debug (-shadowcallstack) -test" ABI_X86="32 (64)" [ebuild N ] sys-devel/clang-runtime-13.0.1 USE="compiler-rt libcxx openmp sanitize" ABI_X86="32 (64) (-x32)" Would you like to merge these packages? [Yes/No] >>> Verifying ebuild manifests >>> Running pre-merge checks for sys-libs/compiler-rt-sanitizers-13.0.1 >>> Emerging (1 of 2) sys-libs/compiler-rt-sanitizers-13.0.1::gentoo >>> Failed to emerge sys-libs/compiler-rt-sanitizers-13.0.1, Log file: >>> '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/temp/build.log' >>> Jobs: 0 of 2 complete, 1 failed Load avg: 0.33, 0.41, 0.86 *** Resuming merge... Calculating dependencies... done! * emerge --keep-going: sys-devel/clang-runtime-13.0.1 dropped because it * requires ~sys-libs/compiler-rt-sanitizers-13.0.1:13.0.1 * Messages for package sys-libs/compiler-rt-sanitizers-13.0.1: * ERROR: sys-libs/compiler-rt-sanitizers-13.0.1::gentoo failed (compile phase): * ninja -v -j17 -l16 failed * * Call stack: * ebuild.sh, line 127: Called src_compile * environment, line 3560: Called cmake_src_compile * environment, line 1523: Called cmake_build * environment, line 1492: Called eninja * environment, line 2012: Called die * The specific snippet of code: * "$@" || die "${nonfatal_args[@]}" "${*} failed" * * If you need support, post the output of `emerge --info '=sys-libs/compiler-rt-sanitizers-13.0.1::gentoo'`, * the complete build log and the output of `emerge -pqv '=sys-libs/compiler-rt-sanitizers-13.0.1::gentoo'`. * The complete build log is located at '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/temp/build.log'. * The ebuild environment file is located at '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/temp/environment'. * Working directory: '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/work/compiler-rt_build' * S: '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/work/compiler-rt' * Messages for package sys-devel/clang-runtime-13.0.1: * emerge --keep-going: sys-devel/clang-runtime-13.0.1 dropped because it * requires ~sys-libs/compiler-rt-sanitizers-13.0.1:13.0.1 * * The following 2 packages have failed to build, install, or execute * postinst: * * (sys-libs/compiler-rt-sanitizers-13.0.1:13.0.1/13.0.1::gentoo, ebuild scheduled for merge), Log file: * '/var/tmp/portage/sys-libs/compiler-rt-sanitizers-13.0.1/temp/build.log' * (sys-devel/clang-runtime-13.0.1:13.0.1/13.0.1::gentoo, ebuild scheduled for merge) * Reproducible: Always
Created attachment 766153 [details] build log
Created attachment 766154 [details] emerge --info
You've attached the log from bug 834489.
Sorry! I'll rebuild and reattach.
Created attachment 766161 [details] .tar.xz compressed build log
Probably your version of sys-libs/libunwind or sys-libs/llvm-libunwind is installed only for 64-bit ABI. Error "cannot find -l:libunwind.so" occurred during building of 32-bit library. You said that you use sys-devel/clang[default-compiler-rt,default-libcxx]. Ebuilds of sys-devel/clang need: - ~sys-devel/clang-runtime-${PV} + ~sys-devel/clang-runtime-${PV}[${MULTILIB_USEDEP}] default-compiler-rt? ( - =sys-libs/compiler-rt-${PV%_*}* + =sys-libs/compiler-rt-${PV%_*}*[${MULTILIB_USEDEP}] - llvm-libunwind? ( sys-libs/llvm-libunwind ) + llvm-libunwind? ( sys-libs/llvm-libunwind[${MULTILIB_USEDEP}] ) - !llvm-libunwind? ( sys-libs/libunwind ) + !llvm-libunwind? ( sys-libs/libunwind[${MULTILIB_USEDEP}] ) ) - default-libcxx? ( >=sys-libs/libcxx-${PV} ) + default-libcxx? ( >=sys-libs/libcxx-${PV}[${MULTILIB_USEDEP}] )
sys-libs/compiler-rt has abi_x86_32 and abi_x86_64 USE flags, but not other abi_* USE flags, so: - ~sys-devel/clang-runtime-${PV} + ~sys-devel/clang-runtime-${PV}[${MULTILIB_USEDEP}] default-compiler-rt? ( - =sys-libs/compiler-rt-${PV%_*}* + =sys-libs/compiler-rt-${PV%_*}*[abi_x86_32?,abi_x86_64?] - llvm-libunwind? ( sys-libs/llvm-libunwind ) + llvm-libunwind? ( sys-libs/llvm-libunwind[${MULTILIB_USEDEP}] ) - !llvm-libunwind? ( sys-libs/libunwind ) + !llvm-libunwind? ( sys-libs/libunwind[${MULTILIB_USEDEP}] ) ) - default-libcxx? ( >=sys-libs/libcxx-${PV} ) + default-libcxx? ( >=sys-libs/libcxx-${PV}[${MULTILIB_USEDEP}] )
Thank you! I'm not sure what went wrong. I'll investigate carefully and let you know. But, I've copied the same config files from another machine, which I don't have access to anymore.
Do you have any suggestions on how to fix this? I guess in the pass portage added something to /etc/portage/package.use/zz-autounmask automatically.
Ah, OK you are right. Now I see: emerge -atv sys-libs/libunwind These are the packages that would be merged, in reverse order: Calculating dependencies... done! [ebuild R ] sys-libs/libunwind-1.6.2:0/8::gentoo USE="debug-frame lzma static-libs zlib -debug -doc -libatomic -test" ABI_X86="(64) -32 (-x32)" 0 KiB Total: 1 package (1 reinstall), Size of downloads: 0 KiB Would you like to merge these packages? [Yes/No] I guess I have to add abi_x86_32 use flag?
I just went to an older machine and it has this inside zz-autounnmask: # required by app-emulation/wine-vanilla-5.5::gentoo[unwind] # required by @selected # required by @world (argument) >=sys-libs/libunwind-1.4.0 abi_x86_32 # required by sys-libs/libunwind-1.4.0::gentoo[lzma] # required by app-emulation/wine-vanilla-5.5::gentoo[unwind] # required by @selected # required by @world (argument) >=app-arch/xz-utils-5.2.5 abi_x86_32 Perhaps, portage somehow did not manage to do the same on this machine. I'll try to add those flags, rebuild, and let you know.
After adding: echo '# abi_x86_32 abi_x86_64 is a remedy for https://bugs.gentoo.org/834490' > /etc/portage/package.use/sys-libs_libunwind echo 'sys-libs/libunwind abi_x86_32 abi_x86_64 debug-frame -libatomic lzma static-libs' >> /etc/portage/package.use/sys-libs_libunwind Emerge shows: Calculating dependencies... done! [ebuild R ] app-arch/xz-utils-5.2.5-r1 ABI_X86="32*" [ebuild R ] sys-libs/zlib-1.2.11-r4 ABI_X86="32*" [ebuild R ] sys-libs/libunwind-1.6.2 ABI_X86="32*" [ebuild N ] sys-libs/compiler-rt-sanitizers-13.0.1 USE="asan cfi clang dfsan gwp-asan hwasan libfuzzer lsan memprof msan orc profile safestack scudo tsan ubsan xray -debug (-shadowcallstack) -test" ABI_X86="32 (64)" [ebuild N ] sys-devel/clang-runtime-13.0.1 USE="compiler-rt libcxx openmp sanitize" ABI_X86="32 (64) (-x32)" The following USE changes are necessary to proceed: (see "package.use" in the portage(5) man page for more details) # required by sys-libs/libunwind-1.6.2::gentoo[lzma] # required by net-fs/samba-4.15.5-r1::gentoo # required by net-fs/cifs-utils-6.13-r1::gentoo[acl] # required by @selected # required by @world (argument) >=app-arch/xz-utils-5.2.5-r1 abi_x86_32 # required by sys-libs/libunwind-1.6.2::gentoo[zlib] # required by net-fs/samba-4.15.5-r1::gentoo # required by net-fs/cifs-utils-6.13-r1::gentoo[acl] # required by @selected # required by @world (argument) >=sys-libs/zlib-1.2.11-r4 abi_x86_32 Autounmask changes successfully written. * IMPORTANT: config file '/etc/portage/package.use/zz-autounmask' needs updating. * See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS * sections of the emerge man page to learn how to update config files.
Thank you very much! It worked!
(In reply to Arfrever Frehtes Taifersar Arahesis from comment #7) > sys-libs/compiler-rt has abi_x86_32 and abi_x86_64 USE flags, but not other > abi_* USE flags, so: > > - ~sys-devel/clang-runtime-${PV} > + ~sys-devel/clang-runtime-${PV}[${MULTILIB_USEDEP}] > default-compiler-rt? ( > - =sys-libs/compiler-rt-${PV%_*}* > + =sys-libs/compiler-rt-${PV%_*}*[abi_x86_32?,abi_x86_64?] > - llvm-libunwind? ( sys-libs/llvm-libunwind ) > + llvm-libunwind? ( sys-libs/llvm-libunwind[${MULTILIB_USEDEP}] ) > - !llvm-libunwind? ( sys-libs/libunwind ) > + !llvm-libunwind? ( sys-libs/libunwind[${MULTILIB_USEDEP}] ) > ) > - default-libcxx? ( >=sys-libs/libcxx-${PV} ) > + default-libcxx? ( >=sys-libs/libcxx-${PV}[${MULTILIB_USEDEP}] ) Multilib flags on clang are for building clang libraries, not controlling target runtimes. Target runtimes are handled via clang-runtime.
I've added additional USE deps to clang-runtime @ 2022-03-06. I think that's the best we can do here.
Reporter of this bug (as mentioned in comment #0) has sys-libs/libcxxabi[-libunwind] and sys-libs/libcxx[-libunwind] for unknown reasons. Such libc++abi.so and libc++.so would not be linked against libunwind.so and chain of dependencies from sys-devel/clang-runtime down to sys-libs/libcxxabi would not require sys-libs/libunwind or sys-libs/llvm-libunwind (so no [${MULTILIB_USEDEP}] would be enforced). But `clang` tool from sys-devel/clang[default-compiler-rt] would internally still pass -l:libunwind.so flag (or -l:libunwind.a when static linking) to linker, which requires library present for correct ABI: https://github.com/llvm/llvm-project/blob/llvmorg-13.0.1/clang/lib/Driver/ToolChains/CommonArgs.cpp#L1445-L1463 I think that having more complete dependencies directly for default-compiler-rt and default-libcxx would not be actually bad... But if this idea is still not liked, then maybe sys-devel/clang-runtime should gain libunwind USE flag: libunwind? ( llvm-libunwind? ( >=sys-libs/llvm-libunwind-${PV}[${MULTILIB_USEDEP}] ) !llvm-libunwind? ( sys-libs/libunwind[${MULTILIB_USEDEP}] ) ) And sys-devel/clang could depend on sys-devel/clang-runtime with appropriate USE flags: default-compiler-rt? ( ~sys-devel/clang-runtime-${PV}[compiler-rt,libunwind] ) default-libcxx? ( ~sys-devel/clang-runtime-${PV}[libcxx] ) (With random combinations of USE flags, problem is still reproducible after 2022-03-06. Bug #835076 is most likely duplicate of this bug.)
*** Bug 835076 has been marked as a duplicate of this bug. ***
*** Bug 846965 has been marked as a duplicate of this bug. ***
