LLVM compiling commands for developers, with some tweaks for debugging & ccache

llvm-build.sh

#!/usr/bin/env bash

LLVM="$1"

# LLVMBaseDirectory="$LLVM"
# BuildMode="Release"
# BuildDirectory="build-release"
# BuildBase="${LLVMBaseDirectory}/${BuildDirectory}"
# LLVMEnableProjects="clang;mlir"

LLVMBaseDirectory="$LLVM"
BuildMode="Debug"
BuildDirectory="build"
BuildBase="${LLVMBaseDirectory}/${BuildDirectory}"
LLVMEnableProjects="clang;mlir;clang-tools-extra;"


# LLVMBaseDirectory="$LLVM"
# BuildMode="Debug"
# BuildDirectory="build-cir"
# BuildBase="${LLVMBaseDirectory}/${BuildDirectory}"
# LLVMEnableProjects="clang;mlir;cir"

# LLVMBaseDirectory="$LLVM"
# BuildMode="Release"
# BuildDirectory="build-cir-release"
# BuildBase="${LLVMBaseDirectory}/${BuildDirectory}"
# LLVMEnableProjects="clang;mlir;cir"

CMakeCommand=(
    cmake
    # For platforms without ninja, use the makefile
    -G Ninja
    -DBUILD_SHARED_LIBS:STRING=On
    -DCMAKE_BUILD_TYPE:STRING=${BuildMode}
    -DLLVM_APPEND_VC_REV:STRING=Off
    -DLLVM_ENABLE_LLD:STRING=On
    -DLLVM_ENABLE_PROJECTS:STRING="${LLVMEnableProjects}"
    -DLLVM_LINK_LLVM_DYLIB:STRING=Off
    -DLLVM_CCACHE_BUILD:BOOL=TRUE
    -DLLVM_USE_SPLIT_DWARF=On
    -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE
    -DCMAKE_C_COMPILER:FILEPATH=${CC:-"clang"}
    -DCMAKE_CXX_COMPILER:FILEPATH=${CXX:-"clang++"}
    -S${LLVMBaseDirectory}/llvm
    -B${BuildBase}
    -DLLVM_TARGETS_TO_BUILD="host;RISCV;"
)

exec "${CMakeCommand[@]}"