python bindings for llvm JIT for EGAD (xo-pyjit)

Getting Started

Build + install xo-cmake dependency

• github/Rconybea/xo-cmake

Installs a few cmake ingredients, along with a build assistant xo-build for XO projects such as this one.

build + install other necessary XO dependencies

$ xo-build --clone --configure --build --install xo-indentlog
$ xo-build --clone --configure --build --install xo-refnct
$ xo-build --clone --configure --build --install xo-subsys
$ xo-build --clone --configure --build --install xo-reflect
$ xo-build --clone --configure --build --install xo-expression
$ xo-build --clone --configure --build --install xo-jit
$ xo-build --clone --configure --build --install xo-pyutil
$ xo-build --clone --configure --build --install xo-pyexpression

note: can use xo-build -n to dry-run here

copy xo-pyjit repository locally

$ xo-build --clone xo-pyjit

or equivalently

$ git clone git@github.com:Rconybea/xo-pyjit.git

build + install xo-pyjit

$ xo-build --configure --build --install xo-pyjit

or equivalently:

$ PREFIX=/usr/local         # or preferred install location
$ cmake -DCMAKE_INSTALL_PREFIX=$PREFIX -S xo-pyjit -B xo-pyjit/.build
$ cmake --build xo-pyjit/.build -j
$ cmake --install xo-pyjit/.build

(also see .github/workflows/main.yml)

Examples

Assumes xo-pyjit installed to ~/local2/lib, i.e. built with PREFIX=~/local2.

PYTHONPATH=~/local2/lib:$PYTHONPATH python
>>> from xo_pyexpression import *
>>> from xo_pyjit import *
>>> x=make_constant(3.14159)
>>> jit=Jit.make()
>>> code=jit.codegen(x)
>>> x.print
double 3.141600e+00

Development

use from build tree

Limited utility: requires that supporting libraries (e.g. xo_pyexpression) appear in PYTHONPATH

$ cd xo-pyjit/.build/src/pyjit
$ python
>>> import xo_pyjit

build for unit test coverage

$ cd xo-pyexpression
$ cmake -DCMAKE_BUILD_TYPE=coverage -DENABLE_TESTING=on -S . -B .build-ccov
$ cmake --build .build-ccov -j

LSP (language server) support

LSP looks for compile commands in the root of the source tree; while Cmake creates them in the root of its build directory.

$ cd xo-pyexpression
$ ln -s .build/compile_commands.json  # supply compile commands to LSP

display cmake variables

• -L list variables
• -A include 'advanced' variables
• -H include help text

$ cd xo-pyjit/.build
$ cmake -LAH