ZLLVM is a flavor of LLVM for x86 with minimal support for ARM, AArch64, and Native (x86) targets. It is built with "Thin" Link Time Optimization and Profile-Guided Optimization (profiled specifically for building the ZapPi Kernel). The scripts to update and build ZapDragon are heavily based on/inspired by Debian's tools for creating LLVM Snapshots.
Projects enabled
Runtimes enabled (used by default)
Compiled builds can be found in releases.
The kernel source for ZapPi Kernel is required to
run the tests for PGO. It is recommended to clone it
alongside this repo, although it can be configured by
the KERNEL_DIR parameter.
This project is compiled using the LLVM made available via apt.
Clone the repository:
git clone https://github.com/uzap/zllvm.git
Pull and patch the LLVM source:
cd zllvm && sh zap/pullsrc.sh
Start the build:
zap/pgo
Note that options can be configured via passing the parameter after zap/pgo, ex:
zap/pgo KERNEL_DIR=/my/kernel/dir KERNEL_BRANCH=example ARM_CRT=no
The separate zap/arm-crt script can be used to cross
compile the compiler-rt runtime for ARM and AArch64,
although it has requirements
and will need to be configured to the local build env.
All of the variables that might require modifying should
be noted within the zap/arm-crt file. This build step
can be disabled via the ARM_CRT parameter (see above).