[blocks B      ] sys-devel/llvm:0 ("sys-devel/llvm:0" is blocking sys-devel/llvm-4.0.0, app-vim/llvm-vim-4.0.0)

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

  (sys-devel/llvm-3.9.1-r1:0/3.9.1::gentoo, installed) pulled in by
    >=sys-devel/llvm-3.8.1-r2:0 required by (dev-lang/rust-1.15.1:stable/1.15::gentoo, installed)
    <sys-devel/llvm-3.10.0:0 required by (dev-lang/rust-1.15.1:stable/1.15::gentoo, installed)
    ~sys-devel/llvm-3.9.1[clang(-),debug=,python?,static-analyzer?,llvm_targets_AArch64?,llvm_targets_AMDGPU?,llvm_targets_ARM?,llvm_targets_BPF?,llvm_targets_Hexagon?,llvm_targets_Mips?,llvm_targets_MSP430?,llvm_targets_NVPTX?,llvm_targets_PowerPC?,llvm_targets_Sparc?,llvm_targets_SystemZ?,llvm_targets_X86?,llvm_targets_XCore?,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] (~sys-devel/llvm-3.9.1[clang(-),-debug,python,static-analyzer,llvm_targets_X86,abi_x86_32(-)]) required by (sys-devel/clang-3.9.1-r100:0/3.9.1::gentoo, installed)

  (sys-devel/llvm-4.0.0:4/4::gentoo, ebuild scheduled for merge) pulled in by
    sys-devel/llvm
    sys-devel/llvm:4[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] (sys-devel/llvm:4[abi_x86_32(-)]) required by (media-libs/mesa-17.0.2:0/0::gentoo, ebuild scheduled for merge)
    <sys-devel/llvm-5:=[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] (<sys-devel/llvm-5:=[abi_x86_32(-)]) required by (media-libs/mesa-17.0.2:0/0::gentoo, ebuild scheduled for merge)


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


The following packages are causing rebuilds:

  (sys-libs/binutils-libs-2.28:0/2.28::gentoo, ebuild scheduled for merge) causes rebuilds for:
    (x11-libs/cairo-1.14.8:0/0::gentoo, ebuild scheduled for merge)