libunwind conflicts llvm-libunwind

[devbit]

I have issue installing libunwind:

emerge -av1p google-perftools libunwind llvm-libunwind libcxxabi

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild R ] sys-libs/libunwind-1.5.0-r1:0/8::gentoo USE="zlib -debug -debug-frame -doc -libatomic -lzma -static-libs" ABI_X86="32 (64) (-x32)" 0 KiB
[ebuild N ] dev-util/google-perftools-2.8:0/4::gentoo USE="debug -largepages -largepages64k -minimal -optimisememory -static-libs -test" ABI_X86="32 (64) (-x32)" 0 KiB
[ebuild N ] sys-devel/llvm-11.0.1:11::gentoo USE="libffi ncurses xml -debug -doc -exegesis -gold -libedit -test -xar -z3" ABI_X86="32 (64) (-x32)" LLVM_TARGETS="AMDGPU BPF NVPTX (X86) -AArch64 (-ARC) -ARM -AVR -Hexagon -Lanai -MSP430 -Mips -PowerPC -RISCV -Sparc -SystemZ (-VE) -WebAssembly -XCore" 0 KiB
[ebuild N ] sys-libs/llvm-libunwind-11.0.1::gentoo USE="static-libs -debug -test" ABI_X86="32 (64) (-x32)" 0 KiB
[ebuild U ] sys-libs/libcxxabi-11.0.1::gentoo [11.0.0::gentoo] USE="libunwind static-libs -test" ABI_X86="32 (64) (-x32)" 0 KiB
[blocks B ] sys-libs/libunwind ("sys-libs/libunwind" is blocking sys-libs/llvm-libunwind-11.0.1)

Total: 5 packages (1 upgrade, 3 new, 1 reinstall), Size of downloads: 0 KiB
Conflict: 1 block (1 unsatisfied)

!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

sys-libs/libcxxabi:0

(sys-libs/libcxxabi-11.0.1:0/0::gentoo, ebuild scheduled for merge) USE="libunwind static-libs -test" ABI_X86="32 (64) (-x32)" pulled in by
sys-libs/libcxxabi (Argument)

(sys-libs/libcxxabi-11.0.0:0/0::gentoo, installed) USE="libunwind static-libs -test" ABI_X86="32 (64) (-x32)" pulled in by
~sys-libs/libcxxabi-11.0.0[libunwind=,static-libs?,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (sys-libs/libcxx-11.0.0:0/0::gentoo, installed) USE="(libcxxabi) libunwind static-libs -test" ABI_X86="32 (64) (-x32)"
^ ^^^^^^


It may be possible to solve this problem by using package.mask to
prevent one of those packages from being selected. However, it is also
possible that conflicting dependencies exist such that they are
impossible to satisfy simultaneously. If such a conflict exists in
the dependencies of two different packages, then those packages can
not be installed simultaneously. You may want to try a larger value of
the --backtrack option, such as --backtrack=30, in order to see if
that will solve this conflict automatically.

For more information, see MASKED PACKAGES section in the emerge man
page or refer to the Gentoo Handbook.


* Error: The above package list contains packages which cannot be
* installed at the same time on the same system.

(sys-libs/libunwind-1.5.0-r1:0/8::gentoo, ebuild scheduled for merge) pulled in by
sys-libs/libunwind required by @selected
sys-libs/libunwind required by (dev-util/google-perftools-2.8:0/4::gentoo, ebuild scheduled for merge) USE="debug -largepages -largepages64k -minimal -optimisememory -static-libs -test" ABI_X86="32 (64) (-x32)"
libunwind

(sys-libs/llvm-libunwind-11.0.1:0/0::gentoo, ebuild scheduled for merge) pulled in by
llvm-libunwind
>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs?,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_s390_32(-)?,abi_s390_64(-)?] (>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs,abi_x86_32(-),abi_x86_64(-)]) required by (sys-libs/libcxxabi-11.0.0:0/0::gentoo, installed) USE="libunwind static-libs -test" ABI_X86="32 (64) (-x32)"
>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs?,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_s390_32(-)?,abi_s390_64(-)?] (>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs,abi_x86_32(-),abi_x86_64(-)]) required by (sys-libs/libcxxabi-11.0.1:0/0::gentoo, ebuild scheduled for merge) USE="libunwind static-libs -test" ABI_X86="32 (64) (-x32)"


For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages

[fedeliallalinea]

[devbit]

I try to mask the package llvm-libunwind, add the line to /etc/portage/package.mask:

[DONAHUE]

leave the = and the * off

the line sys-libs/llvm-libunwind added to /etc/portage/package.mask will mask all versions; the = calls for a single version unless modified by > or <; The * doesn't fit the syntax
_________________
Defund the FCC.

[devbit]

Thanks, I corrected the package.mask, and now I can emerge by removing llvm-libunwing: