# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

import os
import re

from spack import *

tools_url = 'https://github.com/ROCm-Developer-Tools'
compute_url = 'https://github.com/RadeonOpenCompute'

# Arrays of hashes are in order of the versions array below
# For example array[0] = 3.9.0, array[1] = 3.10.0, etc.

aomp = [
    "377ab59b685a73b3f95fba95f5e028678ec5aafabc4177b7f0ffb78da095d679",
    "808fca9bdefb109d5bcbbc9f5b59c564a6d422488869e986516f2a7233eda235",
    "aa75455cf1d333419e5310117678e5789c5222f7cb05b05e3dfacef855c55d84",
    "9e6ed2c7bdc3b4af069751b5d3e92913fd5ac318ae844f68bd78c5def990a8f7",
    "c368d39ba9c1bc8b0edbe66edaa3f2a4ff5649c2bd16f499ac19dfd1591dec5a",
    "c2b1a61a15fdf8d50c7c7a1ad75512f059c53a7bd5afe85f69e984f1174aa74a",
    "2092fd210160986127c302c2d636bf5f58ba3a946d27a8474593fa7f87603950",
    "27a5794b5885c61dc6f63cec36673b37deb029754d3b2fd3e1b21239efffa96a",
    "ce90b9560205f58f50e72615cd937f02041f4eb2ff66ab445ce3b9faf4f4fa4c",
    "2439473fb18bfd404eadd222e5955d0fcdf410a9efc5509696bf7b2780f3c894",
    "64669ac448c439e89ec4b6e0506158e6d9b5a3edfae05882aee4c9bcd5f187b7",
    "e69fe0c933cb30daafe49d9f1df71fe16f387e0287bba921995feeefdf9ac262"
]

devlib = [
    "c99f45dacf5967aef9a31e3731011b9c142446d4a12bac69774998976f2576d7",
    "bca9291385d6bdc91a8b39a46f0fd816157d38abb1725ff5222e6a0daa0834cc",
    "d0aa495f9b63f6d8cf8ac668f4dc61831d996e9ae3f15280052a37b9d7670d2a",
    "f5f5aa6bfbd83ff80a968fa332f80220256447c4ccb71c36f1fbd2b4a8e9fc1b",
    "34a2ac39b9bb7cfa8175cbab05d30e7f3c06aaffce99eed5f79c616d0f910f5f",
    "055a67e63da6491c84cd45865500043553fb33c44d538313dd87040a6f3826f2",
    "a7291813168e500bfa8aaa5d1dccf5250764ddfe27535def01b51eb5021d4592",
    "78412fb10ceb215952b5cc722ed08fa82501b5848d599dc00744ae1bdc196f77",
    "50e9e87ecd6b561cad0d471295d29f7220e195528e567fcabe2ec73838979f61",
    "83ed7aa1c9322b4fc1f57c48a63fc7718eb4195ee6fde433009b4bc78cb363f0",
    "49cfa8f8fc276ba27feef40546788a2aabe259a924a97af8bef24e295d19aa5e",
    "47dbcb41fb4739219cadc9f2b5f21358ed2f9895ce786d2f7a1b2c4fd044d30f"
]

llvm = [
    "1ff14b56d10c2c44d36c3c412b190d3d8cd1bb12cfc7cd58af004c16fd9987d1",
    "8262aff88c1ff6c4deb4da5a4f8cda1bf90668950e2b911f93f73edaee53b370",
    "aa1f80f429fded465e86bcfaef72255da1af1c5c52d58a4c979bc2f6c2da5a69",
    "244e38d824fa7dfa8d0edf3c036b3c84e9c17a16791828e4b745a8d31eb374ae",
    "751eca1d18595b565cfafa01c3cb43efb9107874865a60c80d6760ba83edb661",
    "1567d349cd3bcd2c217b3ecec2f70abccd5e9248bd2c3c9f21d4cdb44897fc87",
    "b53c6b13be7d77dc93a7c62e4adbb414701e4e601e1af2d1e98da4ee07c9837f",
    "b71451bf26650ba06c0c5c4c7df70f13975151eaa673ef0cc77c1ab0000ccc97",
    "36a4f7dd961cf373b743fc679bdf622089d2a905de2cfd6fd6c9e7ff8d8ad61f",
    "bca2db4aaab71541cac588d6a708fde60f0ebe744809bde8a3847044a1a77413",
    "99a14394b406263576ed3d8d10334de7c78d42b349109f375d178b11492eecaf",
    "db5d45c4a7842a908527c1b7b8d4a40c688225a41d23cfa382eab23edfffdd10"
]

flang = [
    "5d113f44fb173bd0d5704b282c5cebbb2aa642c7c29f188764bfa1daa58374c9",
    "3990d39ff1c908b150f464f0653a123d94be30802f9cad6af18fbb560c4b412e",
    "f3e19699ce4ac404f41ffe08ef4546e31e2e741d8deb403b5477659e054275d5",
    "f41f661425534b5cfb20e2c0efd9d0800609dc3876ee9c3f76f026d36abbfa35",
    "d6c3f3aaa289251a433d99d1cffe432812093089ae876a6863295a15066c1eaf",
    "13d3525078fd1c569f7c8ea7fce439b04f6b03814bbe88600c08f95c788e7802",
    "13d3525078fd1c569f7c8ea7fce439b04f6b03814bbe88600c08f95c788e7802",
    "3d7277fd658e51e7e43272c4b319e733c18f5a6d11f739aaec0df758a720809e",
    "54bc3e668577fc30ef77f0c95436e9f9327f256ac8c43eee35eb90000883c6d3",
    "e8d7f828e10516666606bcf2459a25f69401f12f0ae4d3b4a0ca57616bbd9bb0",
    "9b9a53150009ff58bd0ab665b970dbebc51be891343fd5dc8e77a2133ac44333",
    "d95e36f3b93097ab6fb319c744ddc71cd94af0c358accc1e5224c2bbd431266d"
]

extras = [
    "830a37cf1c6700f81fc00749206a37e7cda4d2867bbdf489e9e2d81f52d06b3d",
    "5d98d34aff97416d8b5b9e16e7cf474580f8de8a73bd0e549c4440a3c5df4ef5",
    "51cc8a7c5943e1d9bc657fc9b9797f45e3ce6a4e544d3d3a967c7cd0185a0510",
    "91fdfadb94aa6afc1942124d0953ddc80c297fa75de1897fb42ac8e7dea51ab9",
    "31bbe70b51c259a54370d021ae63528a1740b5477a22412685afd14150fff6f4",
    "ec6cc4a9c24f098496de3206714dafe9a714f06afacfe21d53a4e6344f9cb4c9",
    "ec6cc4a9c24f098496de3206714dafe9a714f06afacfe21d53a4e6344f9cb4c9",
    "a9c32fb7659c0aabba5b1e76ec05037dda485bf893cef4144279b42ef8fae416",
    "2b7ae80dda7ffee63210855bc2746c8a13063777c9b855a562eedca4e7ab6254",
    "9dfaee1eeee2141d4873f7d71fcaeacabe91f1418cb3bed19653e847921944e4",
    "a4affb77bebaafb6f8d22c51d66aa6fa05381ec54cc1e14a4b10e0f3dc00157f",
    "c3a2a83d8f586ee765df96a692ebe010631446f700273fa31738ea260dfc35f7"
]

versions = ['3.9.0', '3.10.0', '4.0.0', '4.1.0', '4.2.0', '4.3.0', '4.3.1', '4.5.0',
            '4.5.2', '5.0.0', '5.0.2', '5.1.0']
versions_dict = dict()
components = ['aomp', 'devlib', 'llvm', 'flang', 'extras']
component_hashes = [aomp, devlib, llvm, flang, extras]

# Loop through versions and create necessary dictionaries of components
for outer_index, item in enumerate(versions):
    for inner_index, component in enumerate(component_hashes):
        versions_dict.setdefault(item, {})[components[inner_index]] = \
            component_hashes[inner_index][outer_index]


class RocmOpenmpExtras(Package):
    """OpenMP support for ROCm LLVM."""

    homepage = tools_url + "/aomp"
    url = tools_url + "/aomp/archive/rocm-5.1.0.tar.gz"

    maintainers = ['srekolam', 'arjun-raj-kuppala', 'estewart08']
    version('5.1.0', sha256=versions_dict['5.1.0']['aomp'])
    version('5.0.2', sha256=versions_dict['5.0.2']['aomp'])
    version('5.0.0', sha256=versions_dict['5.0.0']['aomp'])
    version('4.5.2', sha256=versions_dict['4.5.2']['aomp'])
    version('4.5.0', sha256=versions_dict['4.5.0']['aomp'])
    version('4.3.1', sha256=versions_dict['4.3.1']['aomp'])
    version('4.3.0', sha256=versions_dict['4.3.0']['aomp'])
    version('4.2.0', sha256=versions_dict['4.2.0']['aomp'])
    version('4.1.0', sha256=versions_dict['4.1.0']['aomp'])
    version('4.0.0', sha256=versions_dict['4.0.0']['aomp'])
    version('3.10.0', sha256=versions_dict['3.10.0']['aomp'])
    version('3.9.0', sha256=versions_dict['3.9.0']['aomp'])

    depends_on('cmake@3:', type='build')
    depends_on('py-setuptools', type='build')
    depends_on('python@3:', type='build')
    depends_on('perl-data-dumper', type='build')
    depends_on('awk', type='build')
    depends_on('elfutils', type=('build', 'link'))
    depends_on('libffi', type=('build', 'link'))

    for ver in ['3.9.0', '3.10.0', '4.0.0', '4.1.0', '4.2.0', '4.3.0', '4.3.1',
                '4.5.0', '4.5.2', '5.0.0', '5.0.2', '5.1.0']:
        depends_on('hsakmt-roct@' + ver, when='@' + ver)
        depends_on('comgr@' + ver, when='@' + ver)
        depends_on('hsa-rocr-dev@' + ver, when='@' + ver)
        depends_on('llvm-amdgpu@{0} ~openmp'.format(ver),
                   when='@' + ver)

        # tag changed to 'rocm-' in 4.0.0
        if ver == '3.9.0' or ver == '3.10.0':
            tag = 'rocm-uc-'
        else:
            tag = 'rocm-'

        resource(
            name='rocm-device-libs',
            url=compute_url +
            '/ROCm-Device-Libs/archive/' + tag + ver + '.tar.gz',
            sha256=versions_dict[ver]['devlib'],
            expand=True,
            destination='rocm-openmp-extras',
            placement='rocm-device-libs',
            when='@' + ver)

        resource(
            name='flang',
            url=tools_url + '/flang/archive/' + tag + ver + '.tar.gz',
            sha256=versions_dict[ver]['flang'],
            expand=True,
            destination='rocm-openmp-extras',
            placement='flang',
            when='@' + ver)

        resource(
            name='aomp-extras',
            url=tools_url + '/aomp-extras/archive/' + tag + ver + '.tar.gz',
            sha256=versions_dict[ver]['extras'],
            expand=True,
            destination='rocm-openmp-extras',
            placement='aomp-extras',
            when='@' + ver)

        resource(
            name='llvm-project',
            url=compute_url + '/llvm-project/archive/rocm-' + ver + '.tar.gz',
            sha256=versions_dict[ver]['llvm'],
            expand=True,
            destination='rocm-openmp-extras',
            placement='llvm-project',
            when='@' + ver)

    def setup_run_environment(self, env):
        devlibs_prefix = self.spec['llvm-amdgpu'].prefix
        openmp_extras_prefix = self.spec['rocm-openmp-extras'].prefix
        llvm_prefix = self.spec['llvm-amdgpu'].prefix
        env.set('AOMP', '{0}'.format(llvm_prefix))
        env.set('HIP_DEVICE_LIB_PATH',
                '{0}/amdgcn/bitcode'.format(devlibs_prefix))
        env.prepend_path('CPATH',
                         '{0}/include'.format(openmp_extras_prefix))
        env.prepend_path('LIBRARY_PATH',
                         '{0}/lib'.format(openmp_extras_prefix))
        if self.spec.version < Version('4.1.0'):
            env.set('AOMP_GPU',
                    '`{0}/rocm-bin/mygpu`'.format(openmp_extras_prefix))
        else:
            env.set('AOMP_GPU',
                    '`{0}/bin/mygpu`'.format(openmp_extras_prefix))

    def setup_build_environment(self, env):
        openmp_extras_prefix = self.spec['rocm-openmp-extras'].prefix
        llvm_prefix = self.spec['llvm-amdgpu'].prefix
        env.set('AOMP', '{0}'.format(llvm_prefix))
        env.set('FC', '{0}/bin/flang'.format(openmp_extras_prefix))
        gfx_list = "gfx700 gfx701 gfx801 gfx803 gfx900 gfx902 gfx906 gfx908"

        if self.spec.version >= Version('4.3.1'):
            gfx_list = gfx_list + " gfx90a gfx1030 gfx1031"
        env.set('GFXLIST', gfx_list)

    def patch(self):
        src = self.stage.source_path
        aomp_extras = '{0}/rocm-openmp-extras/aomp-extras/aomp-device-libs'
        libomptarget = \
            '{0}/rocm-openmp-extras/llvm-project/openmp/libomptarget'
        flang = '{0}/rocm-openmp-extras/flang/'

        if self.spec.version >= Version('4.3.0') \
           and self.spec.version < Version('5.0.0'):
            filter_file('STRIP ${FLANG_SHA}', 'STRIP 0',
                        flang.format(src) + 'CMakeLists.txt', string=True)

        if self.spec.version < Version('4.1.0'):
            plugin = '/plugins/hsa/CMakeLists.txt'
        else:
            plugin = '/plugins/amdgpu/CMakeLists.txt'

        filter_file(
            '{ROCM_DIR}/amdgcn/bitcode', '{DEVICE_LIBS_DIR}',
            aomp_extras.format(src) + '/aompextras/CMakeLists.txt',
            libomptarget.format(src) + '/deviceRTLs/amdgcn/CMakeLists.txt')

        # Libm moved into llvm-project in 4.5.0
        if self.spec.version < Version('4.5.0'):
            filter_file(
                '{ROCM_DIR}/amdgcn/bitcode', '{DEVICE_LIBS_DIR}',
                aomp_extras.format(src) + '/libm/CMakeLists.txt')

        # Openmp adjustments
        # Fix relocation error with libffi by not using static lib.
        if self.spec.version >= Version('5.1.0'):
            filter_file('libffi.a', '',
                        libomptarget.format(src) +
                        '/cmake/Modules/LibomptargetGetDependencies.cmake')

        if self.spec.version >= Version('5.0.0'):
            filter_file('{OPENMP_INSTALL_LIBDIR}', '{OPENMP_INSTALL_LIBDIR}/libdevice',
                        libomptarget.format(src) +
                        '/deviceRTLs/amdgcn/CMakeLists.txt')

        if self.spec.version >= Version('4.5.0'):
            filter_file(
                '{ROCM_DIR}/amdgcn/bitcode', '{DEVICE_LIBS_DIR}',
                libomptarget.format(src) + '/deviceRTLs/libm/CMakeLists.txt')

        if self.spec.version <= Version('4.5.0'):
            filter_file(
                'dl elf', 'dl ${LIBOMPTARGET_DEP_LIBELF_LIBRARIES}',
                libomptarget.format(src) + '/plugins/amdgpu/CMakeLists.txt')

        filter_file(
            '-nogpulib', '-nogpulib -nogpuinc',
            libomptarget.format(src) + '/deviceRTLs/amdgcn/CMakeLists.txt')

        filter_file(
            '-x hip', '-x hip -nogpulib -nogpuinc',
            libomptarget.format(src) + '/deviceRTLs/amdgcn/CMakeLists.txt')

        filter_file(
            '-c ', '-c -nogpulib -nogpuinc -I{LIMIT}',
            libomptarget.format(src) + '/hostrpc/CMakeLists.txt')

        filter_file(
            r'${ROCM_DIR}/hsa/include ${ROCM_DIR}/hsa/include/hsa',
            '${HSA_INCLUDE}/hsa/include ${HSA_INCLUDE}/hsa/include/hsa',
            libomptarget.format(src) + plugin,
            string=True)

        filter_file(
            '{ROCM_DIR}/hsa/lib', '{HSA_LIB}',
            libomptarget.format(src) + plugin)

        filter_file(
            r'{ROCM_DIR}/lib\)',
            '{HSAKMT_LIB})\nset(HSAKMT_LIB64 ${HSAKMT_LIB64})',
            libomptarget.format(src) + plugin)

        filter_file(
            r'-L${LIBOMPTARGET_DEP_LIBHSAKMT_LIBRARIES_DIRS}',
            '-L${LIBOMPTARGET_DEP_LIBHSAKMT_LIBRARIES_DIRS} -L${HSAKMT_LIB64}',
            libomptarget.format(src) + plugin,
            string=True)

        filter_file(
            r'-rpath,${LIBOMPTARGET_DEP_LIBHSAKMT_LIBRARIES_DIRS}',
            '-rpath,${LIBOMPTARGET_DEP_LIBHSAKMT_LIBRARIES_DIRS}' +
            ',-rpath,${HSAKMT_LIB64}',
            libomptarget.format(src) + plugin,
            string=True)

        filter_file(
            '{ROCM_DIR}/include', '{COMGR_INCLUDE}',
            libomptarget.format(src) + plugin)

        filter_file(
            r'-L${LLVM_LIBDIR}${OPENMP_LIBDIR_SUFFIX}',
            '-L${LLVM_LIBDIR}${OPENMP_LIBDIR_SUFFIX} -L${COMGR_LIB}',
            libomptarget.format(src) + plugin,
            string=True)

        filter_file(
            r'rpath,${LLVM_LIBDIR}${OPENMP_LIBDIR_SUFFIX}',
            'rpath,${LLVM_LIBDIR}${OPENMP_LIBDIR_SUFFIX}' +
            '-Wl,-rpath,${COMGR_LIB}',
            libomptarget.format(src) + plugin,
            string=True)

        filter_file(
            'ADDITIONAL_VERSIONS 2.7', 'ADDITIONAL_VERSIONS 3',
            flang.format(src) + 'CMakeLists.txt')

    def install(self, spec, prefix):
        src = self.stage.source_path
        gfx_list = os.environ['GFXLIST']
        gfx_list = gfx_list.replace(" ", ";")
        openmp_extras_prefix = self.spec['rocm-openmp-extras'].prefix
        devlibs_prefix = self.spec['llvm-amdgpu'].prefix
        devlibs_src = '{0}/rocm-openmp-extras/rocm-device-libs'.format(src)
        hsa_prefix = self.spec['hsa-rocr-dev'].prefix
        hsakmt_prefix = self.spec['hsakmt-roct'].prefix
        comgr_prefix = self.spec['comgr'].prefix
        llvm_inc = '/rocm-openmp-extras/llvm-project/llvm/include'
        llvm_prefix = self.spec['llvm-amdgpu'].prefix
        omp_bin_dir = '{0}/bin'.format(openmp_extras_prefix)
        omp_lib_dir = '{0}/lib'.format(openmp_extras_prefix)
        bin_dir = '{0}/bin'.format(llvm_prefix)
        lib_dir = '{0}/lib'.format(llvm_prefix)
        flang_warning = '-Wno-incompatible-pointer-types-discards-qualifiers'
        libpgmath = '/rocm-openmp-extras/flang/runtime/libpgmath/lib/common'
        elfutils_inc = spec['elfutils'].prefix.include
        ffi_inc = spec['libffi'].prefix.include

        # flang1 and flang2 symlink needed for build of flang-runtime
        # libdevice symlink to rocm-openmp-extras for runtime
        # libdebug symlink to rocm-openmp-extras for runtime
        if (os.path.islink((os.path.join(bin_dir, 'flang1')))):
            os.unlink(os.path.join(bin_dir, 'flang1'))
        if (os.path.islink((os.path.join(bin_dir, 'flang2')))):
            os.unlink(os.path.join(bin_dir, 'flang2'))
        if (os.path.islink((os.path.join(lib_dir, 'libdevice')))):
            os.unlink(os.path.join(lib_dir, 'libdevice'))
        if (os.path.islink((os.path.join(llvm_prefix, 'lib-debug')))):
            os.unlink(os.path.join(llvm_prefix, 'lib-debug'))

        os.symlink(os.path.join(omp_bin_dir, 'flang1'),
                   os.path.join(bin_dir, 'flang1'))
        os.symlink(os.path.join(omp_bin_dir, 'flang2'),
                   os.path.join(bin_dir, 'flang2'))
        os.symlink(os.path.join(omp_lib_dir, 'libdevice'),
                   os.path.join(lib_dir, 'libdevice'))
        os.symlink(os.path.join(openmp_extras_prefix, 'lib-debug'),
                   os.path.join(llvm_prefix, 'lib-debug'))

        # Set cmake args
        components = dict()

        components['aomp-extras'] = [
            '../rocm-openmp-extras/aomp-extras',
            '-DLLVM_DIR={0}'.format(llvm_prefix),
            '-DDEVICE_LIBS_DIR={0}/amdgcn/bitcode'.format(devlibs_prefix),
            '-DCMAKE_C_COMPILER={0}/clang'.format(bin_dir),
            '-DCMAKE_CXX_COMPILER={0}/clang++'.format(bin_dir),
            '-DAOMP_STANDALONE_BUILD=0',
            '-DDEVICELIBS_ROOT={0}'.format(devlibs_src),
            '-DNEW_BC_PATH=1',
            '-DAOMP={0}'.format(llvm_prefix)
        ]

        # Shared cmake configuration for openmp, openmp-debug
        # Due to hsa-rocr-dev using libelf instead of elfutils
        # the build of openmp fails because the include path
        # for libelf is placed before elfutils in SPACK_INCLUDE_DIRS.
        # Passing the elfutils include path via cmake options is a
        # workaround until hsa-rocr-dev switches to elfutils.
        openmp_common_args = [
            '-DROCM_DIR={0}'.format(hsa_prefix),
            '-DDEVICE_LIBS_DIR={0}/amdgcn/bitcode'.format(devlibs_prefix),
            '-DAOMP_STANDALONE_BUILD=0',
            '-DDEVICELIBS_ROOT={0}'.format(devlibs_src),
            '-DOPENMP_TEST_C_COMPILER={0}/clang'.format(bin_dir),
            '-DOPENMP_TEST_CXX_COMPILER={0}/clang++'.format(bin_dir),
            '-DCMAKE_C_COMPILER={0}/clang'.format(bin_dir),
            '-DCMAKE_CXX_COMPILER={0}/clang++'.format(bin_dir),
            '-DLIBOMPTARGET_AMDGCN_GFXLIST={0}'.format(gfx_list),
            '-DLIBOMP_COPY_EXPORTS=OFF',
            '-DHSA_LIB={0}/lib'.format(hsa_prefix),
            '-DHSAKMT_LIB={0}/lib'.format(hsakmt_prefix),
            '-DHSAKMT_LIB64={0}/lib64'.format(hsakmt_prefix),
            '-DCOMGR_INCLUDE={0}/include'.format(comgr_prefix),
            '-DCOMGR_LIB={0}/lib'.format(comgr_prefix),
            '-DOPENMP_ENABLE_LIBOMPTARGET=1',
            '-DOPENMP_ENABLE_LIBOMPTARGET_HSA=1',
            '-DLLVM_MAIN_INCLUDE_DIR={0}{1}'.format(src, llvm_inc),
            '-DLLVM_INSTALL_PREFIX={0}'.format(llvm_prefix),
            '-DCMAKE_C_FLAGS=-isystem{0} -I{1}'.format(elfutils_inc, ffi_inc),
            '-DCMAKE_CXX_FLAGS=-isystem{0} -I{1}'.format(elfutils_inc, ffi_inc),
            '-DNEW_BC_PATH=1'
        ]

        if self.spec.version < Version('4.1.0'):
            openmp_common_args += [
                '-DHSA_INCLUDE={0}'.format(hsa_prefix)
            ]
        else:
            openmp_common_args += [
                '-DHSA_INCLUDE={0}/include/hsa'.format(hsa_prefix)
            ]

        components['openmp'] = ['../rocm-openmp-extras/llvm-project/openmp']
        components['openmp'] += openmp_common_args

        components['openmp-debug'] = [
            '../rocm-openmp-extras/llvm-project/openmp',
            '-DLIBOMPTARGET_NVPTX_DEBUG=ON',
            '-DCMAKE_CXX_FLAGS=-g',
            '-DCMAKE_C_FLAGS=-g'
        ]

        components['openmp-debug'] += openmp_common_args

        # Shared cmake configuration for pgmath, flang, flang-runtime
        flang_common_args = [
            '-DLLVM_ENABLE_ASSERTIONS=ON',
            '-DLLVM_CONFIG={0}/llvm-config'.format(bin_dir),
            '-DCMAKE_CXX_COMPILER={0}/clang++'.format(bin_dir),
            '-DCMAKE_C_COMPILER={0}/clang'.format(bin_dir),
            '-DCMAKE_Fortran_COMPILER={0}/flang'.format(bin_dir),
            '-DLLVM_TARGETS_TO_BUILD=AMDGPU;x86'
        ]
        if self.spec.version >= Version('4.2.0'):
            # Spack thinks some warnings from the flang build are errors.
            # Disable those warnings in C and CXX flags.
            flang_common_args += [
                '-DCMAKE_CXX_FLAGS={0}'.format(flang_warning) +
                ' -I{0}{1}'.format(src, libpgmath),
                '-DCMAKE_C_FLAGS={0}'.format(flang_warning) +
                ' -I{0}{1}'.format(src, libpgmath)
            ]

        components['pgmath'] = [
            '../rocm-openmp-extras/flang/runtime/libpgmath'
        ]

        components['pgmath'] += flang_common_args

        components['flang'] = [
            '../rocm-openmp-extras/flang',
            '-DFLANG_OPENMP_GPU_AMD=ON',
            '-DFLANG_OPENMP_GPU_NVIDIA=ON'
        ]

        components['flang'] += flang_common_args

        components['flang-runtime'] = [
            '../rocm-openmp-extras/flang',
            '-DLLVM_INSTALL_RUNTIME=ON',
            '-DFLANG_BUILD_RUNTIME=ON',
            '-DOPENMP_BUILD_DIR={0}/spack-build-openmp/runtime/src'.format(src)
        ]
        components['flang-runtime'] += flang_common_args

        build_order = [
            "aomp-extras", "openmp", "openmp-debug", "pgmath",
            "flang", "flang-runtime"
        ]

        # Override standard CMAKE_BUILD_TYPE
        for arg in std_cmake_args:
            found = re.search("CMAKE_BUILD_TYPE", arg)
            if found:
                std_cmake_args.remove(arg)
        for component in build_order:
            with working_dir('spack-build-{0}'.format(component), create=True):
                cmake_args = components[component]
                cmake_args.extend(std_cmake_args)
                # OpenMP build needs to be run twice(Release, Debug)
                if component == "openmp-debug":
                    cmake_args.append("-DCMAKE_BUILD_TYPE=Debug")
                else:
                    cmake_args.append("-DCMAKE_BUILD_TYPE=Release")
                cmake(*cmake_args)
                make()
                make("install")
