Makefile

   1 # build llvm and clang (for wasm only)
   2 toolchain/build/llvm/bin/clang:
   3         mkdir -p toolchain/build/llvm
   4         cmake -G "Unix Makefiles" \
   5                 -DLLVM_TARGETS_TO_BUILD= \
   6                 -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly \
   7                 -S toolchain/src/llvm -B toolchain/build/llvm
   8         # install the tools we need
   9         $(MAKE) -C toolchain/build/llvm clang lld llvm-ar llvm-config llvm-ranlib
  10
  11 ROOT_DIR=${CURDIR}
  12 # now build libc
  13 sysroot/lib/libc.a: toolchain/build/llvm/bin/clang
  14         mkdir -p toolchain/build/musl
  15         cd toolchain/build/musl; $(ROOT_DIR)/toolchain/src/musl/configure \
  16                 CC=$(ROOT_DIR)/toolchain/build/llvm/bin/clang \
  17                 CFLAGS="--target=wasm32-unknown-unknown-wasm -O3" \
  18                 --prefix=$(ROOT_DIR)/sysroot \
  19                 wasm32
  20         $(MAKE) -C toolchain/build/musl install \
  21                 CROSS_COMPILE=$(ROOT_DIR)/toolchain/build/llvm/bin/llvm-
  22         # need to copy over musl's list of javascript function imports
  23         cp toolchain/src/musl/arch/wasm32/libc.imports sysroot/lib
  24
  25 # build the wasm32 builtins
  26 toolchain/build/llvm/lib/clang/8.0.0/lib/libclang_rt.builtins-wasm32.a: toolchain/build/llvm/bin/clang
  27         mkdir -p toolchain/build/compiler-rt
  28         cmake -G "Unix Makefiles" \
  29                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/compiler-rt.cmake \
  30                 -S toolchain/src/compiler-rt/lib/builtins -B toolchain/build/compiler-rt
  31         $(MAKE) -C toolchain/build/compiler-rt/ install
  32
  33 sysroot/lib/libc++.a: toolchain/build/llvm/bin/clang toolchain/build/llvm/lib/clang/8.0.0/lib/libclang_rt.builtins-wasm32.a sysroot/lib/libc.a
  34         mkdir -p toolchain/build/libcxx
  35         cmake -G "Unix Makefiles" \
  36                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/libcxx.cmake \
  37                 -S toolchain/src/libcxx/ -B toolchain/build/libcxx
  38         $(MAKE) -C toolchain/build/libcxx install
  39
  40 sysroot/lib/libc++abi.a: toolchain/build/llvm/bin/clang sysroot/lib/libc++.a
  41         mkdir -p toolchain/build/libcxxabi
  42         cmake -G "Unix Makefiles" \
  43                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/libcxxabi.cmake \
  44                 -S toolchain/src/libcxxabi -B toolchain/build/libcxxabi
  45         $(MAKE) -C toolchain/build/libcxxabi install
  46
  47
  48 sysroot: sysroot/lib/libc.a sysroot/lib/libc++.a sysroot/lib/libc++abi.a
  49
  50 test.wasm: test.cpp sysroot
  51         clang++ --target=wasm32-unknown-unknown-wasm -g \
  52                 -fno-exceptions --sysroot=sysroot -nostartfiles \
  53                 -Wl,--export=foo,--demangle,--no-entry \
  54                 test.cpp -o test.wasm