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| author | Kito Cheng <kito.cheng@sifive.com> | 2023-06-13 18:28:21 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-06-13 18:28:21 +0800 |
| commit | 89268de2af0957d571cf5ad0e0b894a15b147b25 (patch) | |
| tree | 9a32eeed2ca66dd46c4ba9bf5329babe8819a35a | |
| parent | 89f3238e9dfd9630741b543cf608a8dd5a8cea16 (diff) | |
| parent | 9027b5a78ddf9c9279618674f67186c1bb636825 (diff) | |
| download | riscv-gnu-toolchain-89268de2af0957d571cf5ad0e0b894a15b147b25.zip riscv-gnu-toolchain-89268de2af0957d571cf5ad0e0b894a15b147b25.tar.gz riscv-gnu-toolchain-89268de2af0957d571cf5ad0e0b894a15b147b25.tar.bz2 | |
Merge pull request #1273 from alexsifivetw/alexc/newlib-llvm
Add newlib toolchain with llvm build flow
| -rw-r--r-- | Makefile.in | 22 | ||||
| -rw-r--r-- | README.md | 20 |
2 files changed, 34 insertions, 8 deletions
diff --git a/Makefile.in b/Makefile.in index 47d66e8..578e511 100644 --- a/Makefile.in +++ b/Makefile.in @@ -938,12 +938,26 @@ stamps/build-llvm-linux: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) \ $(MAKE) -C $(notdir $@) $(MAKE) -C $(notdir $@) install cp $(notdir $@)/lib/riscv$(XLEN)-unknown-linux-gnu/libc++* $(SYSROOT)/lib - cd $(INSTALL_DIR)/bin && ln -s -f clang $(LINUX_TUPLE)-clang + cd $(INSTALL_DIR)/bin && ln -s -f clang $(LINUX_TUPLE)-clang && ln -s -f clang++ $(LINUX_TUPLE)-clang++ mkdir -p $(dir $@) && touch $@ -stamps/build-llvm-newlib: - echo "Building LLVM is only supported in combination with a Linux toolchain." - exit 1 +stamps/build-llvm-newlib: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) stamps/build-gcc-newlib-stage2 + rm -rf $@ $(notdir $@) + mkdir $(notdir $@) + cd $(notdir $@) && \ + cmake $(LLVM_SRCDIR)/llvm \ + -DCMAKE_INSTALL_PREFIX=$(INSTALL_DIR) \ + -DCMAKE_BUILD_TYPE=Release \ + -DLLVM_TARGETS_TO_BUILD="RISCV" \ + -DLLVM_ENABLE_PROJECTS="clang;lld" \ + -DLLVM_DEFAULT_TARGET_TRIPLE="$(NEWLIB_TUPLE)" \ + -DLLVM_INSTALL_TOOLCHAIN_ONLY=On \ + -DLLVM_PARALLEL_LINK_JOBS=4 + $(MAKE) -C $(notdir $@) + $(MAKE) -C $(notdir $@) install + cd $(INSTALL_DIR)/bin && ln -s -f clang $(NEWLIB_TUPLE)-clang && \ + ln -s -f clang++ $(NEWLIB_TUPLE)-clang++ + mkdir -p $(dir $@) && touch $@ stamps/build-dejagnu: $(DEJAGNU_SRCDIR) $(DEJAGNU_SRC_GIT) rm -rf $@ $(notdir $@) @@ -260,12 +260,12 @@ can be used: Note, that a combination of `--enable-llvm` and multilib configuration flags is not supported. -Also note, that building LLVM is only supported in combination with building -a Linux toolchain. -Below is an example how to build a rv64gc Linux toolchain with LLVM support, +Below are examples how to build a rv64gc Linux/newlib toolchain with LLVM support, how to use it to build a C and a C++ application using clang, and how to -execute the generated binaries using QEMU: +execute the generated binaries using QEMU. + +Build Linux toolchain and run examples: # Build rv64gc toolchain with LLVM ./configure --prefix=$RISCV --enable-llvm --enable-linux --with-arch=rv64gc --with-abi=lp64d @@ -277,6 +277,18 @@ execute the generated binaries using QEMU: $RISCV/bin/clang++ -march=rv64imafdc -stdlib=libc++ -o hello_world_cpp hello_world_cpp.cxx $RISCV/bin/qemu-riscv64 -L $RISCV/sysroot ./hello_world_cpp +Build newlib toolchain and run examples (don't work with `--with-multilib-generator=`): + + # Build rv64gc bare-metal toolchain with LLVM + ./configure --prefix=$RISCV --enable-llvm --disable-linux --with-arch=rv64gc --with-abi=lp64d + make -j$(nproc) all build-sim SIM=qemu + # Build C application with clang + $RISCV/bin/clang -march=rv64imafdc -o hello_world hello_world.c + $RISCV/bin/qemu-riscv64 -L $RISCV/sysroot ./hello_world + # Build C++ application with clang using static link + $RISCV/bin/clang++ -march=rv64imafdc -static -o hello_world_cpp hello_world_cpp.cxx + $RISCV/bin/qemu-riscv64 -L $RISCV/sysroot ./hello_world_cpp + ### Development This section is only for developer or advanced user, or you want to build |