Build llvm TODO: Update for submodule support ....

Prerequesites

• Gcc 6+
• cmake
• ninja &| make
• gold &| bfd

Building

Options:

• LLVM_BUILD_ENGINE=<Ninja|"Unix Makefiles"> the type of build to create (default "Unix Makefiles")
• LLVM_BUILD_TYPE=<Release|Debug> the type of build to create (default Release)
• LLVM_INSTALL_DIR=xxx where xxx is the path to the install directory (default ./dist)
• LINKER=<gold|bfd> the linker to use (default bfd)

Build using the defaults as defined by lib/llvm/src submodule:

make -j10

Example over riding the defaults for building llvm-6.0.0:

make llvm-6.0.0 -j12 LLVM_BUILD_ENGINE=Ninja BULID_TYPE=Debug LLVM_INSTALL_DIR=./bin LINKER=gold

Building has been tested on a 32G RAM desktop, 16G laptop and a 1G VM. Be careful using -j for parallel build with the desktop -j10 wasn't a problem but with the laptop I needed to use -j2 and the tiny VM -j1. YMMV.

Install

You must use the same LLVM_BUILD_ENGINE and LLVM_INSTALL_DIR as used when building or none if not specified when building

make install

Clean

Clean binaries

make clean