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Add support for compiling gollvm for other arch by specifying GOLLVM_DRIVER_DIR to a prebuilt gollvm with two targets, and specify target, toolchain and sysroot in GOLLVM_EXTRA_GOCFLAGS.
Example usage:
RISCV=$HOME/toolchain
SOURCE=$HOME/llvm-project/llvm
TRIPLE=riscv64-unknown-linux-gnu
# host
cmake -G Ninja -S $SOURCE -B build-x86 \
-DCMAKE_INSTALL_PREFIX=install-x86 \
-DCMAKE_BUILD_TYPE=Debug \
-DLLVM_USE_LINKER=bfd \
-DGOLLVM_DEFAULT_LINKER=bfd \
-DLLVM_TARGET_ARCH="X86-64,RISCV64" \
-DLLVM_TARGETS_TO_BUILD="X86;RISCV"
# crosscompile
cmake -G Ninja -S $SOURCE -B build-riscv \
-DCMAKE_INSTALL_PREFIX=$INSTALL \
-DCMAKE_BUILD_TYPE=Debug \
-DLLVM_USE_LINKER=bfd \
-DGOLLVM_DEFAULT_LINKER=bfd \
-DCMAKE_CROSSCOMPILING=True \
-DLLVM_TARGET_ARCH=RISCV64 \
-DLLVM_DEFAULT_TARGET_TRIPLE=$TRIPLE \
-DLLVM_TARGETS_TO_BUILD=RISCV \
-DCMAKE_C_COMPILER=$RISCV/bin/$TRIPLE-gcc \
-DCMAKE_CXX_COMPILER=$RISCV/bin/$TRIPLE-g++ \
-DLLVM_TABLEGEN=$PWD/build-x86/bin/llvm-tblgen \
-DGOLLVM_DRIVER_DIR=$PWD/build-x86/bin \
-DGOLLVM_EXTRA_GOCFLAGS="--target=$TRIPLE \
--gcc-toolchain=$RISCV/ \
--sysroot=$RISCV/sysroot" \
-DGOLLVM_USE_SPLIT_STACK=OFF \
-DCMAKE_C_FLAGS=-latomic \
-DCMAKE_CXX_FLAGS=-latomic
# build gollvm crosscompiler
ninja -C build-x86 llvm-goc llvm-goc-token llvm-godumpspec
# cross compile gollvm, go tools and install
ninja -C build-riscv install-gollvm
Change-Id: Ie4997771fd21437f65d857b7aaae267b7a394f23
Reviewed-on: https://go-review.googlesource.com/c/gollvm/+/425199
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Currently, architecture information is passed to the compiler but not the integrated assembler, causing discrepancies in the ABI chosen by the two tools, especially on the RISC-V platform. This patch makes sure both share the same architecture information. Change-Id: I29f441e86e06f1f0b46c3ea62576a7d1291c2ce4 Reviewed-on: https://go-review.googlesource.com/c/gollvm/+/425854 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
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This patch adds relevant flags for builoding on RISC-V linux platform, its C-ABI setup is on another patch. Change-Id: Ibfe22aabb7a6718ccf3e55c6cc35f70953d972d4
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This patch sets up the C-ABI oracle for the RISC-V linux platform. The main changes are: 1. The C calling convention is used to identify this platform. 2. C-ABI oracle and compile options are set for RISC-V linux. 3. The ABI is hardcoded as lp64d on RISC-V linux. Change-Id: I640cd7dbaf7d7efb6abdba93a04e9b9a37244eca
The check_xxx_tool tests fail immediately because go.mod is not present in the test directory. This patch copies these files to enable them but relies on the existence of go.sum, is there a better way? Change-Id: Ibb67d5bd687da3ca6e3ee63f4d787c1fc468e6ab
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The first two commits are already merged into gollvm master. The last commit is likely to be changed so will be committed individually.The other two commits are to be committed.