Makefile

   1 .PHONY: all
   2 all: test.wasm
   3
   4 # build llvm and clang (for wasm only)
   5 toolchain/build/llvm/bin/clang:
   6         mkdir -p toolchain/build/llvm
   7         cmake -G "Unix Makefiles" \
   8                 -DLLVM_TARGETS_TO_BUILD= \
   9                 -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly \
  10                 -S toolchain/src/llvm -B toolchain/build/llvm
  11         # install the tools we need
  12         $(MAKE) -C toolchain/build/llvm clang lld llvm-ar llvm-config llvm-ranlib
  13
  14 ROOT_DIR=${CURDIR}
  15 # now build libc
  16 sysroot/lib/libc.a: toolchain/build/llvm/bin/clang
  17         mkdir -p toolchain/build/musl
  18         cd toolchain/build/musl; $(ROOT_DIR)/toolchain/src/musl/configure \
  19                 CC=$(ROOT_DIR)/toolchain/build/llvm/bin/clang \
  20                 CFLAGS="--target=wasm32-unknown-unknown-wasm -O3" \
  21                 --prefix=$(ROOT_DIR)/sysroot \
  22                 wasm32
  23         $(MAKE) -C toolchain/build/musl install \
  24                 CROSS_COMPILE=$(ROOT_DIR)/toolchain/build/llvm/bin/llvm-
  25         # need to copy over musl's list of javascript function imports
  26         cp toolchain/src/musl/arch/wasm32/libc.imports sysroot/lib
  27
  28 # build the wasm32 builtins
  29 toolchain/build/llvm/lib/clang/8.0.0/lib/libclang_rt.builtins-wasm32.a: toolchain/build/llvm/bin/clang
  30         mkdir -p toolchain/build/compiler-rt
  31         cmake -G "Unix Makefiles" \
  32                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/compiler-rt.cmake \
  33                 -S toolchain/src/compiler-rt/lib/builtins -B toolchain/build/compiler-rt
  34         $(MAKE) -C toolchain/build/compiler-rt/ install
  35
  36 sysroot/lib/libc++.a: toolchain/build/llvm/bin/clang toolchain/build/llvm/lib/clang/8.0.0/lib/libclang_rt.builtins-wasm32.a sysroot/lib/libc.a
  37         mkdir -p toolchain/build/libcxx
  38         cmake -G "Unix Makefiles" \
  39                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/libcxx.cmake \
  40                 -S toolchain/src/libcxx/ -B toolchain/build/libcxx
  41         $(MAKE) -C toolchain/build/libcxx install
  42
  43 sysroot/lib/libc++abi.a: toolchain/build/llvm/bin/clang sysroot/lib/libc++.a
  44         mkdir -p toolchain/build/libcxxabi
  45         cmake -G "Unix Makefiles" \
  46                 -DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/toolchain/libcxxabi.cmake \
  47                 -S toolchain/src/libcxxabi -B toolchain/build/libcxxabi
  48         $(MAKE) -C toolchain/build/libcxxabi install
  49
  50
  51 sysroot: sysroot/lib/libc.a sysroot/lib/libc++.a sysroot/lib/libc++abi.a
  52
  53 test.wasm: test.cpp sysroot
  54         toolchain/build/llvm/bin/clang++ \
  55                 --target=wasm32-unknown-unknown-wasm -g -O3 \
  56                 -fno-exceptions --sysroot=sysroot -nostartfiles \
  57                 -I/usr/local/include \
  58                 -Wl,--export=setup,--export=update,--demangle,--no-entry,--allow-undefined-file=gles2.imports \
  59                 test.cpp -o test.wasm
  60