[llvm-bugs] [Bug 41544] New: Missing support for RISC-V --binary-architecture and --output-target values

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41544

            Bug ID: 41544
           Summary: Missing support for RISC-V --binary-architecture and
                    --output-target values
           Product: tools
           Version: trunk
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-objcopy/strip
          Assignee: unassignedbugs at nondot.org
          Reporter: jorg.brown at gmail.com
                CC: alexander.v.shaposhnikov at gmail.com,
                    jake.h.ehrlich at gmail.com,
                    jh7370.2008 at my.bristol.ac.uk,
                    llvm-bugs at lists.llvm.org, rupprecht at google.com

objcopy's support for -binary-architecture values is surprisingly sparse;
currently it's driven by this map in CopyConfig.cpp:

static const StringMap<MachineInfo> ArchMap{
    // Name, {EMachine, 64bit, LittleEndian}
    {"aarch64", {ELF::EM_AARCH64, true, true}},
    {"arm", {ELF::EM_ARM, false, true}},
    {"i386", {ELF::EM_386, false, true}},
    {"i386:x86-64", {ELF::EM_X86_64, true, true}},
    {"mips", {ELF::EM_MIPS, false, false}},
    {"powerpc:common64", {ELF::EM_PPC64, true, true}},
    {"sparc", {ELF::EM_SPARC, false, true}},
    {"x86-64", {ELF::EM_X86_64, true, true}},
};

There should be entries there for riscv; I imagine they would be "riscv:rv32"
and "riscv:rv64".

Likewise, output_format should allow elf32-littleriscv and elf64-littleriscv .

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