gistfile1.txt

pushd /image/usr/src/linux-5.13.12
make ARCH=x86_64 mrproper
make ARCH=x86_64 INSTALL_HDR_PATH=/image/usr headers_install
popd

mkdir -p /image/var/tmp/build/compiler-rt-12.0.1
pushd /image/var/tmp/build/compiler-rt-12.0.1
cmake -D CMAKE_BUILD_TYPE=Release                                              \
      -D CMAKE_C_COMPILER=clang                                                \
      -D CMAKE_C_COMPILER_TARGET=x86_64-unknown-linux-musl                     \
      -D CMAKE_CXX_COMPILER=clang++                                            \
      -D CMAKE_CXX_COMPILER_TARGET=x86_64-unknown-linux-musl                   \
      -D CMAKE_INSTALL_LIBDIR=lib                                              \
      -D CMAKE_INSTALL_PREFIX=/usr                                             \
      -D COMPILER_RT_BUILD_LIBFUZZER=NO                                        \
      -D COMPILER_RT_BUILD_PROFILE=NO                                          \
      -D COMPILER_RT_BUILD_SANITIZERS=NO                                       \
      -D COMPILER_RT_BUILD_XRAY=NO                                             \
      -D COMPILER_RT_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-musl           \
      -G Ninja                                                                 \
      -S /image/usr/src/compiler-rt-12.0.1.src
ninja
DESTDIR=/image ninja install
popd

mkdir -p /image/var/tmp/build/musl-1.2.2
pushd /image/var/tmp/build/musl-1.2.2
LIBCC=/image/usr/lib/linux/libclang_rt.builtins-x86_64.a                      \
CC=clang                                                                       \
  /image/usr/src/musl-1.2.2/configure                                         \
      --prefix=/usr                                                            \
      --syslibdir=/usr/lib                                                     \
      --host=x86_64-unknown-linux-musl                                         \
      --disable-static
make -j 32 AR=ar RANLIB=ranlib
make DESTDIR=/image install-libs install-headers
popd

mkdir -p /image/var/tmp/build/libunwind-12.0.1
pushd /image/var/tmp/build/libunwind-12.0.1
cmake -D CMAKE_BUILD_TYPE=Release                                              \
      -D CMAKE_C_COMPILER=clang                                                \
      -D CMAKE_C_COMPILER_TARGET=x86_64-unknown-linux-musl                     \
      -D CMAKE_CXX_COMPILER=clang++                                            \
      -D CMAKE_CXX_COMPILER_TARGET=x86_64-unknown-linux-musl                   \
      -D CMAKE_CXX_COMPILER_WORKS=YES                                          \
      -D CMAKE_INSTALL_LIBDIR=lib                                              \
      -D CMAKE_INSTALL_PREFIX=/usr                                             \
      -D LIBUNWIND_ENABLE_STATIC=NO                                            \
      -D LIBUNWIND_USE_COMPILER_RT=YES                                         \
      -D LIBUNWIND_INCLUDE_DOCS=NO                                             \
      -G Ninja                                                                 \
      -S /image/usr/src/libunwind-12.0.1.src
ninja
DESTDIR=/image ninja install
popd

mkdir -p /image/var/tmp/build/libcxxabi-12.0.1
pushd /image/var/tmp/build/libcxxabi-12.0.1
cmake -D CMAKE_BUILD_TYPE=Release                                              \
      -D CMAKE_C_COMPILER=clang                                                \
      -D CMAKE_C_COMPILER_TARGET=x86_64-unknown-linux-musl                     \
      -D CMAKE_CXX_COMPILER=clang++                                            \
      -D CMAKE_CXX_COMPILER_TARGET=x86_64-unknown-linux-musl                   \
      -D CMAKE_CXX_COMPILER_WORKS=YES                                          \
      -D CMAKE_INSTALL_LIBDIR=lib                                              \
      -D CMAKE_INSTALL_PREFIX=/usr                                             \
      -D LIBCXXABI_USE_LLVM_UNWINDER=YES                                       \
      -D LIBCXXABI_USE_COMPILER_RT=YES                                         \
      -D LIBCXXABI_TARGET_TRIPLE=x86_64-unknown-linux-musl                     \
      -D LIBCXXABI_SYSROOT=/image/usr                                         \
      -D LIBCXXABI_ENABLE_STATIC=NO                                            \
      -D LIBCXXABI_LIBCXX_PATH=/image/usr/src/libcxx-12.0.1.src               \
      -G Ninja                                                                 \
      -S /image/usr/src/libcxxabi-12.0.1.src
ninja
DESTDIR=/image ninja install
popd

mkdir -p /image/var/tmp/build/libcxx-12.0.1
pushd /image/var/tmp/build/libcxx-12.0.1
cmake -D CMAKE_BUILD_TYPE=Release                                              \
      -D CMAKE_C_COMPILER=clang                                                \
      -D CMAKE_C_COMPILER_TARGET=x86_64-unknown-linux-musl                     \
      -D CMAKE_CXX_COMPILER=clang++                                            \
      -D CMAKE_CXX_COMPILER_TARGET=x86_64-unknown-linux-musl                   \
      -D CMAKE_CXX_COMPILER_WORKS=YES                                          \
      -D CMAKE_INSTALL_LIBDIR=lib                                              \
      -D CMAKE_INSTALL_PREFIX=/usr                                             \
      -D LIBCXX_ENABLE_STATIC=NO                                               \
      -D LIBCXX_CXX_ABI=libcxxabi                                              \
      -D LIBCXX_TARGET_TRIPLE=x86_64-unknown-linux-musl                        \
      -D LIBCXX_SYSROOT=/image/usr                                            \
      -D LIBCXX_HAS_MUSL_LIBC=YES                                              \
      -D LLVM_PATH=/image/usr/src/llvm-12.0.1.src                             \
      -G Ninja                                                                 \
      -S /image/usr/src/libcxx-12.0.1.src
ninja
DESTDIR=/image ninja install
popd

mkdir -p /image/var/tmp/build/llvm-12.0.1
pushd /image/var/tmp/build/llvm-12.0.1
cmake -D CMAKE_BUILD_TYPE=Release                                              \
      -D CMAKE_C_COMPILER=clang                                                \
      -D CMAKE_C_FLAGS="--sysroot=/image/usr -stdlib=libc++"                   \
      -D CMAKE_CXX_COMPILER=clang++                                            \
      -D CMAKE_CXX_FLAGS="--sysroot=/image -stdlib=libc++"                     \
      -D CMAKE_INSTALL_LIBDIR=lib                                              \
      -D CMAKE_INSTALL_PREFIX=/usr                                             \
      -D CMAKE_EXE_LINKER_FLAGS="-Xlinker --dynamic-linker=/usr/lib/ld-musl-x86_64.so.1" \
      -D LLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-musl                  \
      -D LLVM_ENABLE_PROJECTS="clang;lld"                                      \
      -D LLVM_TARGETS_TO_BUILD="AArch64;ARM;RISCV;X86;WebAssembly"             \
      -D LLVM_INSTALL_BINUTILS_SYMLINKS=YES                                    \
      -D LLVM_INSTALL_TOOLCHAIN_ONLY=YES                                       \
      -D LLVM_DISTRIBUTION_COMPONENTS="clang;lld"                              \
      -D LLVM_TABLEGEN=/image/var/tmp/build/llvm-tools-12.0.1/bin/llvm-tblgen  \
      -D CLANG_TABLEGEN=/image/var/tmp/build/llvm-tools-12.0.1/bin/clang-tblgen \
      -G Ninja                                                                 \
      -S /image/usr/src/llvm-12.0.1.src

export CFLAGS="-target x86_64-unknown-linux-musl --sysroot=/image/usr"
export CXXFLAGS="-target x86_64-unknown-linux-musl --sysroot=/image/usr"
export LDFLAGS="-target x86_64-unknown-linux-musl --sysroot=/image/usr -stdlib=libc++ -rtlib=compiler-rt -unwindlib=libunwind -Xlinker --dynamic-linker=/usr/lib/ld-musl-x86_64.so.1"