# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4

PortSystem                            1.0
PortGroup select                      1.0
PortGroup compiler_blacklist_versions 1.0
PortGroup active_variants             1.1
PortGroup cmake                       1.1
PortGroup legacysupport               1.1

# Do not propagate c/c++ standards as set by base
cmake.set_c_standard     no
cmake.set_cxx_standard   no

# link legacysupport statically for compilers
legacysupport.use_static              yes
# Sysconf wrapping causes issues so disable
legacysupport.disable_function_wrap   yes

categories              lang
license                 NCSA
maintainers             nomaintainer

set llvm_version        14
set clang_exe_version   ${llvm_version}
version                 ${llvm_version}.0.6

name                    llvm-${llvm_version}
revision                0
subport                 mlir-${llvm_version}  { revision 0 }
subport                 clang-${llvm_version} { revision 3 }
subport                 lldb-${llvm_version}  { revision 2 }
subport                 flang-${llvm_version} { revision 1 }

checksums               rmd160  2b8b71bbb9fa5718c85f78924a0aa7e700cbd2ee \
                        sha256  8b3cfd7bc695bd6cea0f37f53f0981f34f87496e79e2529874fd03a2f9dd3a8a \
                        size    105618228

master_sites            https://github.com/llvm/llvm-project/releases/download/llvmorg-${version}
distname                llvm-project-${version}.src
use_xz                  yes

dist_subdir             llvm
set suffix              mp-${llvm_version}
set sub_prefix          ${prefix}/libexec/llvm-${llvm_version}
worksrcdir              ${worksrcdir}/llvm

# hand-tweaked, approximately c++ standard 2017
compiler.blacklist      *gcc* {clang < 1001} macports-clang-3.*
# work/build/include/c++/v1/optional:224:5: error: destructor cannot be marked constexpr
#     _LIBCPP_CONSTEXPR_AFTER_CXX17 ~__optional_destruct_base()
compiler.blacklist-append {clang < 1204} {macports-clang-[5-9].0}
compiler.fallback       clang macports-clang-11 macports-clang-10

# We can't use Ninja with our custom destrooting plan for llvm
#cmake.generator         Ninja
cmake.install_prefix    ${sub_prefix}
cmake.build_type        Release

# clean up some cmake-PG added values we don't want to use, because we want @rpaths
cmake.install_rpath

configure.pre_args-delete \
    -DCMAKE_INSTALL_NAME_DIR="${cmake.install_prefix}/lib"

configure.pre_args-replace \
    -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON \
    -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=OFF

configure.pre_args-replace \
    -DCMAKE_SYSTEM_PREFIX_PATH="${prefix}\;${cmake.install_prefix}\;/usr" \
    -DCMAKE_SYSTEM_PREFIX_PATH="${cmake.install_prefix}\;${prefix}\;/usr"

configure.args-append \
    -DLLVM_LINK_LLVM_DYLIB=ON \
    -DLLVM_ENABLE_RTTI=ON \
    -DLLVM_INCLUDE_TESTS=OFF \
    -DLLVM_INCLUDE_EXAMPLES=OFF \
    -DLLVM_ENABLE_FFI=ON \
    -DFFI_INCLUDE_DIR=${prefix}/include \
    -DFFI_LIBRARY_DIR=${prefix}/lib

# Disable iOS support on older systems
if {${os.platform} eq "darwin" && ${os.major} <= 12} {
    configure.args-append    -DCOMPILER_RT_ENABLE_IOS=OFF
}

# cctools is needed to handle objects from newer clang toolchains
if {[string match macports-clang-* ${configure.compiler}]} {
    depends_build-append            port:cctools
    depends_skip_archcheck-append   cctools
    configure.args-append           -DCMAKE_LIBTOOL=${prefix}/bin/libtool
}

# Do not update past 3.10 as this creates circular dependency issues
set py_ver              3.10
set py_ver_nodot        [string map {. {}} ${py_ver}]
depends_build-append    port:python${py_ver_nodot} \
                        port:py${py_ver_nodot}-pygments \
                        port:py${py_ver_nodot}-yaml
set pythonfullpath      ${prefix}/bin/python${py_ver}
configure.args-append   -DPython3_EXECUTABLE=${pythonfullpath}

platform darwin {
    configure.cxx_stdlib libc++
    depends_lib-append port:libcxx
    if {${os.major} < 11} {
        pre-fetch {
            if {![file exists /usr/lib/libc++.dylib]} {
                ui_error "$name requires a C++11 runtime, which your configuration does not allow"
                error "unsupported configuration"
            }
        }
    }
}

patch.dir ${workpath}/${distname}
patch.pre_args-replace  -p0 -p1

patchfiles-append \
    0001-MacPorts-only-clang-use-MP-omp-locations.patch \
    0002-MacPorts-Only-Don-t-embed-the-deployment-target-in-t.patch \
    0003-MacPorts-Only-Prepare-clang-format-for-replacement-w.patch \
    0004-MacPorts-Only-Fix-name-of-scan-view-executable-insid.patch \
    0006-Define-EXC_MASK_CRASH-and-MACH_EXCEPTION_CODES-if-th.patch \
    0007-Threading-Only-call-pthread_setname_np-if-we-have-it.patch \
    0008-Threading-Only-call-setpriority-PRIO_DARWIN_THREAD-0.patch \
    0009-lib-Support-Unix-Path.inc-define-COPYFILE_CLONE-if-n.patch \
    0010-compiler-rt-cmake-config-ix.cmake-was-Leopard-No-ASA.patch \
    0011-Fix-missing-long-long-math-prototypes-when-using-the.patch \
    0012-compiler-rt-add-some-defs-missing-in-older-SDKs.patch \
    0013-clang-add-back-runtime-libraries-used-on-10.4-and-10.patch \
    0014-Fix-float.h-to-work-on-Snow-Leopard-and-earlier.patch \
    0015-Fixup-libstdc-header-search-paths-for-older-versions.patch \
    0019-10.6-and-less-use-emulated-TLS-before-10.7.patch \
    0025-lldb-add-defines-needed-for-older-SDKs.patch \
    0032-lldb-Add-cstdio-include-to-fix-a595b931f1f91897317a4.patch \
    0033-xray-Use-L-instead-of-.L-for-Mach-O.patch \
    0034-builtins-Move-cfi-start-s-after-the-symbol-name-NFC.patch \
    MachOWriter.cpp-types.patch \
    SyntheticSections.cpp-types.patch \
    patch-lldb-stdc-macros-134877.diff \
    patch-lldb-fix-swig-lvalue-2128646.diff \
    patch-xcode-15.diff

if {${os.platform} eq "darwin" && ${os.major} < 14} {
    patchfiles-append \
        0016-10.10-and-less-compiler-rt-find-macosx-sdk.patch
}

if {${os.platform} eq "darwin" && ${os.major} < 11} {
    patchfiles-append \
        0017-10.6-and-less-libcxx-work-around-no-reexported_symbo.patch \
        0017-10.6-and-less-libcxxabi-work-around-no-reexported_symbo.patch \
        0020-10.6-and-less-work-around-no-directory-watcher-befor.patch \
        0021-10.6-and-less-libcxx-disable-Availability-tests.patch
}

if {${os.platform} eq "darwin" && ${os.major} < 10} {
    patchfiles-append \
        0022-10.5-and-less-default-to-fno-blocks.patch \
        0024-10.5-and-less-compiler-rt-work-around-no-libdispatch.patch \
        0027-libcxx-link-gcc_s.1-on-macOS-before-10.6.patch
}

if {${os.platform} eq "darwin" && ${os.major} < 16} {
    # error: 'TARGET_OS_OSX' is not defined, evaluates to 0 [-Werror,-Wundef-prefix=TARGET_OS_]
    patchfiles-append  0100-define-target-os-osx.patch
}

if {${os.platform} eq "darwin" && ${os.major} < 16} {
    # Avoid attempts to use 'clonefile'
    # llvm/lib/Support/Unix/Path.inc:1476:10: error: use of undeclared identifier 'clonefile'
    patchfiles-append  0031-Avoid-Use-Of-Clonefile.patch
}

post-patch {
    reinplace "s|@@PREFIX@@|${prefix}|" \
        ${patch.dir}/clang/lib/Driver/ToolChains/Clang.cpp \
        ${patch.dir}/clang/lib/Driver/ToolChains/CommonArgs.cpp

    reinplace "s|@CLANG_FORMAT_PATH@|${prefix}/bin/clang-format-${suffix}|g" \
        ${patch.dir}/clang/tools/clang-format/clang-format-bbedit.applescript \
        ${patch.dir}/clang/tools/clang-format/clang-format-diff.py            \
        ${patch.dir}/clang/tools/clang-format/clang-format-sublime.py         \
        ${patch.dir}/clang/tools/clang-format/clang-format.el                 \
        ${patch.dir}/clang/tools/clang-format/clang-format.py
}

if {${subport} eq "llvm-${llvm_version}"} {

    homepage            https://llvm.org/
    description         llvm is a next generation compiler infrastructure
    long_description    The LLVM Core libraries provide a modern source- and \
                        target-independent optimizer, along with code \
                        generation support for many popular CPUs (as well as \
                        some less common ones!) These libraries are built \
                        around a well specified code representation known as \
                        the LLVM intermediate representation ("LLVM IR").

    depends_lib-append  port:libedit port:libffi port:ncurses path:lib/libxar.dylib:xar port:zlib
    depends_run-append  port:llvm_select

    select.group        llvm
    select.file         ${filespath}/mp-${subport}

    configure.args-append \
                        -DLLVM_ENABLE_PROJECTS="polly"
}

if {${subport} eq "mlir-${llvm_version}"} {
    homepage            https://mlir.llvm.org

    description         The MLIR project is a novel approach to building reusable \
                        and extensible compiler infrastructure.
    long_description    {*}${description} MLIR aims to address software fragmentation, \
                        improve compilation for heterogeneous hardware, significantly \
                        reduce the cost of building domain specific compilers, and aid \
                        in connecting existing compilers together.

    # i386 build fails: https://trac.macports.org/ticket/63734
    supported_archs     arm64 x86_64

    depends_lib-append  port:llvm-${llvm_version}

    configure.args-append \
                        -DLLVM_ENABLE_PROJECTS="mlir"

    destroot {
        # we have to run the destroot like this, because individual targets for each of the
        # components we want to install are not available; we want "everything but llvm"
        system "cd ${destroot.dir}/tools/mlir && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
    }
}

if { ${subport} eq "clang-${llvm_version}" } {
    homepage            https://clang.llvm.org/

    description         C, C++, Objective C and Objective C++ compiler
    long_description    The Clang project provides a language front-end and tooling infrastructure \
                        for languages in the C language family (C, C++, Objective C/C++, OpenCL, \
                        CUDA, and RenderScript) for the LLVM project.

    depends_run-append  port:clang_select port:cctools
    select.group        clang
    select.file         ${filespath}/mp-${subport}

    configure.args-append   \
        -DLLVM_ENABLE_PROJECTS="clang\;clang-tools-extra\;compiler-rt\;libcxx\;libcxxabi\;lld" \
        -DLIBCXX_ENABLE_SHARED=ON    \
        -DLIBCXX_INSTALL_LIBRARY=ON

    destroot {
        # we have to run the destroot like this, because individual targets for each of the
        # components we want to install are not available; we want "everything but llvm"
        system "cd ${destroot.dir}/tools/clang          && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
        system "cd ${destroot.dir}/tools/lld            && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
        system "cd ${destroot.dir}/projects/compiler-rt && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
        system "cd ${destroot.dir}/projects/libcxx      && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
        system "cd ${destroot.dir}/projects/libcxxabi   && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
    }
}

if { ${subport} eq "flang-${llvm_version}" } {
    homepage            https://flang.llvm.org/

    description         LLVM Fortran compiler
    long_description    {*}${description}

    # has to match mlir's archs
    supported_archs     arm64 x86_64

    post-patch {
        reinplace -E "1s|^#!.*$|#!${prefix}/bin/bash|" ${worksrcpath}/../flang/tools/f18/flang
    }

    configure.args-append \
        -DLLVM_ENABLE_PROJECTS="clang\;flang\;compiler-rt\;mlir" \
        -DLIBCXX_ENABLE_SHARED=OFF          \
        -DLIBCXX_INSTALL_LIBRARY=OFF

    depends_lib-append  port:clang-${llvm_version} port:mlir-${llvm_version}
    depends_run-append  port:bash

    destroot {
        # we have to run the destroot like this, because individual targets for each of the
        # components we want to install are not available; we want "everything but llvm"
        system "cd ${destroot.dir}/tools/flang && ${destroot.cmd} ${destroot.pre_args} ${destroot.target} ${destroot.post_args}"
    }

    notes-append {
        This version of flang passes off to another fortran compiler to do the actual compiling.
        At present, you may need to set the desired fortran compiler with an ENV VAR if\
        the default gfortran is not found on PATH.
        For example: F18_FC=gfortran-mp-11 flang-mp-13 hello.f90 -o hello.bin
        See https://github.com/llvm/llvm-project/blob/master/flang/docs/ReleaseNotes.md
    }
}

if { ${subport} eq "mlir-${llvm_version}" ||
     ${subport} eq "flang-${llvm_version}" } {
    # temporarily restrict to newer systems until older systems can be rigorously vetted
    platforms {darwin >= 10}
}

if { ${subport} eq "clang-${llvm_version}" || ${subport} eq "flang-${llvm_version}" } {

    depends_lib-append  port:libxml2 port:libomp port:llvm-${llvm_version}
    depends_run-append  port:ld64
    depends_skip_archcheck-append ld64

    # CMAKE_LINKER is used to determine the value for HOST_LINK_VERSION
    configure.args-append \
        -DCMAKE_LINKER=${prefix}/bin/ld    \
        -DCLANG_INCLUDE_TESTS=OFF          \
        -DCLANG_ENABLE_STATIC_ANALYZER=OFF \
        -DCLANG_ENABLE_ARCMT=OFF           \
        -DDARWIN_PREFER_PUBLIC_SDK=ON      \
        -DLLVM_BUILD_RUNTIME=ON

    if {${os.platform} eq "darwin" && ${os.major} <= 18} {
        # on systems that might build i386, we need atomic builtins
        # https://trac.macports.org/ticket/58712
        configure.args-append    -DCOMPILER_RT_EXCLUDE_ATOMIC_BUILTIN=OFF
    }

    if {${os.platform} eq "darwin" && ${os.major} <= 14} {
        # compiler-rt does a broad search for an SDK it likes, but this
        # search fails on older systems that don't have a MacOSX.sdk
        # TODO: apply this always to all systems?
        if {${configure.sdkroot} eq ""} {set configure.sdkroot "/"}
        configure.args-append    -DDARWIN_osx_SYSROOT="${configure.sdkroot}"
    }

    if {${os.platform} eq "darwin" && ${os.major} <= 15} {
        # sanitizers in compiler_rt fail to build on older systems
        # might be fixable with the use of newer SDK and/or effort if motivated
        # all three toggles are needed to force them off
        configure.args-append    -DCOMPILER_RT_BUILD_SANITIZERS=OFF \
                                 -DCOMPILER_RT_BUILD_XRAY=OFF \
                                 -DCOMPILER_RT_BUILD_MEMPROF=OFF
    }

    if {${os.platform} eq "darwin" && ${os.major} <= 11} {
        # xpc.h available 10.7 but doesn't support nullable features
        configure.args-append    -DCLANGD_BUILD_XPC=OFF
    }

    if {${os.platform} eq "darwin" && ${os.major} <= 10} {
        # avoid need for thread_local_storage
        configure.args-append    -DCLANG_ENABLE_CLANGD=OFF \
                                 -DLLVM_ENABLE_BACKTRACES=OFF
    }

    post-configure {
        # -Wl,-syslibroot referencing the macOS SDK must not appear when linking
        # runtime libraries for non-macOS platforms, which are cross-built and
        # used for cross-platform support. The clang and flang builds will
        # provide the proper -isysroot for the platform in these cases. Remove
        # the macOS SDK.
        foreach rtl_dir {asan lsan stats tsan/rtl ubsan ubsan_minimal} {
            set rtl [lindex [split ${rtl_dir} /] 0]
            foreach rtl_os {ios iossim} {
                set link_txt_path "${workpath}/build/projects/compiler-rt/lib/${rtl_dir}/CMakeFiles/clang_rt.${rtl}_${rtl_os}_dynamic.dir/link.txt"
                if {[file exists "${link_txt_path}"]} {
                    reinplace "s|-Wl,-syslibroot,${configure.sdkroot}||" "${link_txt_path}"
                }
            }
        }
    }
}

if {${subport} eq "lldb-${llvm_version}"} {

    homepage            https://lldb.llvm.org/
    description         the LLVM debugger
    long_description    lldb is the "LLVM native" debugger.

    depends_lib-append  port:libedit port:libffi port:ncurses port:python${py_ver_nodot} path:lib/libxar.dylib:xar port:zlib
    depends_lib-append  port:llvm-${llvm_version} port:clang-${llvm_version}
    depends_build-append port:swig-python path:bin/doxygen:doxygen
    depends_run-append  port:lldb_select

    select.group        lldb
    select.file         ${filespath}/mp-${subport}

    # error: use of undeclared identifier 'CPU_SUBTYPE_ARM64E
    platforms {darwin >= 18}

    configure.args-append \
        -DLLDB_CODESIGN_IDENTITY=- \
        -DLLDB_ENABLE_LUA=OFF

    set worksrcpath ${workpath}/${distname}/lldb

    notes "Please follow the instructions at https://lldb.llvm.org/resources/build.html#code-signing-on-macos and then codesign lldb-server with:\n--------------------\n"
    notes-append "${sub_prefix}/scripts/lldb/macos-setup-codesign.sh"
    if {${os.major} >= 13} {
        notes-append "sudo codesign --force --deep --preserve-metadata=identifier,entitlements,resource-rules,requirements,flags,team-identifier --sign lldb_codesign ${sub_prefix}/bin/lldb-server"
    } else {
        notes-append "sudo codesign --force --deep --preserve-metadata=identifier,entitlements,resource-rules,requirements --sign lldb_codesign ${sub_prefix}/bin/lldb-server"
    }
}

variant tests description {Enable building of test code} {
    depends_test-append     port:py${py_ver_nodot}-psutil
    test.run                yes
    configure.args-append   -DLLVM_INCLUDE_TESTS=ON
    test.target             check

   if {${subport} eq "clang-${llvm_version}"} {
       test.target    check-all
   }

   if {${subport} eq "lldb-${llvm_version}"} {
        pre-fetch {
            ui_error "running the test suite on ${subport} is not supported on this os version at present."
            return -code error {unsupported platform}
        }
   }
}

post-destroot {

    if {${subport} eq "clang-${llvm_version}"} {
        # remove the clang symlink and replace it with the actual binary
        delete      ${destroot}${sub_prefix}/bin/clang
        file rename ${destroot}${sub_prefix}/bin/clang-${clang_exe_version} ${destroot}${sub_prefix}/bin/clang
    }

    # generate a versioned wrapper script for each file in the bin directory
    foreach bin [glob ${destroot}${sub_prefix}/bin/*] {
        set bin_filename [string map "${sub_prefix} ${prefix}" ${bin}]-${suffix}
        set exec_path    [string map "${destroot}${sub_prefix} ${sub_prefix}" ${bin}]

        # see https://trac.macports.org/ticket/54985
        if {${os.platform} eq "darwin" && [vercmp ${xcodeversion} 4.6] < 0} {
             xinstall -m 755 "${filespath}/llvm-bin-compat" "${bin_filename}"
        } else {
             xinstall -m 755 "${filespath}/llvm-bin" "${bin_filename}"
        }

        reinplace "s:EXEC_PATH:${exec_path}:" "${bin_filename}"
    }

    if {${subport} eq "llvm-${llvm_version}"} {
        # https://llvm.org/bugs/show_bug.cgi?id=19465
        ln -s LLVMPolly.so ${destroot}${sub_prefix}/lib/LLVMPolly.dylib
    }

    if {${subport} eq "flang-${llvm_version}"} {
        # fix errant permissions on the flang binary
        system "chmod 755 ${destroot}${sub_prefix}/bin/flang"
    }

    if {${subport} eq "clang-${llvm_version}"} {
        # fix the cmake scripts to point to the versioned files
        reinplace "s|/bin/clang-${clang_exe_version}|/bin/clang|g" \
                  "${destroot}${sub_prefix}/lib/cmake/clang/ClangTargets-release.cmake"

        # http://trac.macports.org/ticket/33207
        ln -s ${prefix}/libexec/ld64/ld ${destroot}${sub_prefix}/bin/ld
    }

    if {${subport} eq "lldb-${llvm_version}"} {
        delete ${destroot}${prefix}/bin/debugserver-${suffix}

        set lldb_scripts_srcdir ${worksrcpath}/scripts
        set lldb_scripts_destdir ${destroot}${sub_prefix}/scripts/lldb
        xinstall -d ${lldb_scripts_destdir}
        xinstall -m 755 -W ${lldb_scripts_srcdir} \
            macos-setup-codesign.sh \
            ${lldb_scripts_destdir}
    }

    if {${subport} eq "clang-${llvm_version}"} {
        # move libc++ libraries out of default location to prevent accidental linkage
        set libcxx_dir ${destroot}${sub_prefix}/lib/libc++
        xinstall -d ${libcxx_dir}
        foreach f [glob -nocomplain ${destroot}${sub_prefix}/lib/libc++*.*] {
            ui_debug "Moving ${f} to ${libcxx_dir}"
            move ${f} ${libcxx_dir}
        }
    }
}

if {${subport} eq "clang-${llvm_version}"} {

    variant analyzer description {Install clang static analyzer} {
        # these have to be switched on or off together
        configure.args-replace -DCLANG_ENABLE_STATIC_ANALYZER=OFF \
                               -DCLANG_ENABLE_STATIC_ANALYZER=ON
        configure.args-replace -DCLANG_ENABLE_ARCMT=OFF \
                               -DCLANG_ENABLE_ARCMT=ON

        depends_run-append port:perl5

        post-patch {
            reinplace "s|/usr/bin/env perl|${prefix}/bin/perl5|g" \
                ${patch.dir}/clang/tools/scan-build/libexec/ccc-analyzer \
                ${patch.dir}/clang/tools/scan-build/libexec/c++-analyzer \
                ${patch.dir}/clang/tools/scan-build/bin/scan-build
       }
    }

    # Avoid requiring a bootstrap version of perl5 on 10.6.
    if {${os.major} >= 11} {
        default_variants    +analyzer
    }


    if { ${cxx_stdlib} eq "libc++" && ${os.major} < 13 } {
        variant defaultlibcxx description {default to -stdlib=libc++ if not otherwise specified}  {
            # on systems older than darwin 13, if macports.conf is configured to stdlib=libc++
            # then make that the default if not otherwise specified. This matches the behaviour of newer systems.
            patchfiles-append 0018-10.6-and-less-clang-default-to-libc-on-all-darwin-sy.patch
        }
        default_variants-append +defaultlibcxx
    }

    variant libstdcxx description {-stdlib=libstdc++_macports searches for MacPorts libstdc++} {

        patchfiles-append 0005-clang-support-macports-libstdcxx.patch
        if {${os.major} < 11} {
            # see https://trac.macports.org/ticket/61778
            depends_run-append  port:libstdcxx_clang_fix
        }

        post-patch {
            reinplace "s|@@MACPORTS_GCC_INCLUDE_DIR@@|${prefix}/include/gcc/c++|g" \
                ${patch.dir}/clang/lib/Lex/InitHeaderSearch.cpp \
                ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
            reinplace "s|@@MACPORTS_HOST_NAME@@|${configure.build_arch}-apple-darwin${os.major}|g" \
                ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
            reinplace "s|@@MACPORTS_libstdc++@@|${prefix}/lib/libgcc/libstdc++.6.dylib|g" \
                ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp

            # GCC was built for ${configure.build_arch}-apple-darwin${os.major}
            # if GCC was also built universal, it has an extra include directory
            # if ${configure.build_arch} is 32-bit, there is an extra 64-bit subdirectory
            # if ${configure.build_arch} is 64-bit, there is an extra 32-bit subdirectory
            # MacPorts GCC cannot compile across platforms
            switch ${configure.build_arch} {
                x86_64 {
                    reinplace {s|@@MACPORTS_TEST_32_64@@|getTriple().getArch() == llvm::Triple::x86_64 ? "" : "i386"|g} \
                        ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
                }
                i386 {
                    reinplace {s|@@MACPORTS_TEST_32_64@@|getTriple().getArch() == llvm::Triple::x86_64 ? "x86_64" : ""|g} \
                        ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
                }
                ppc64 {
                    reinplace {s|@@MACPORTS_TEST_32_64@@|getTriple().getArch() == llvm::Triple::ppc64 ? "" : "ppc"|g} \
                        ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
                }
                ppc {
                    reinplace {s|@@MACPORTS_TEST_32_64@@|getTriple().getArch() == llvm::Triple::ppc64 ? "ppc64" : ""|g} \
                        ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
                }
                arm64 {
                    reinplace {s|@@MACPORTS_TEST_32_64@@|""|g} \
                        ${patch.dir}/clang/lib/Driver/ToolChains/Darwin.cpp
                }
            }
        }
    }
    if { ${cxx_stdlib} eq "libstdc++" } {
        default_variants-append +libstdcxx
    }
}

livecheck.type      regex
livecheck.url       https://github.com/llvm/llvm-project/tags
livecheck.regex     llvmorg-(${llvm_version}.\[\\d.\]+).tar.gz