Fix meson in case of editable build in conda/pixi environment

[StFroese]

Problem

Building chromo in a pixi environment failed because:

meson.build was extracting numpy/f2py include paths and adding them to include_directories():

chromo/meson.build

Line 21 in e9310e8

numpy_inc = numpy_dep.get_variable('cflags').split()[0].replace('-I', '')

chromo/meson.build

Lines 29 to 32 in e9310e8

	f2py_inc = run_command(
	py, '-c',
	'import numpy.f2py, pathlib, sys; print((pathlib.Path(numpy.f2py.__file__).parent / "src"))',
	check:true).stdout().strip()

chromo/meson.build

Lines 66 to 70 in e9310e8

	common_inc = [
	src_root,
	numpy_inc,
	f2py_inc,
	]

chromo/meson.build

Line 229 in e9310e8

inc_dirs = common_inc

chromo/meson.build

Lines 265 to 269 in e9310e8

	py.extension_module(name,
	sources : srcs + [wrap, f2py_obj],
	include_directories: include_directories(inc_dirs),
	dependencies : [py_dep, numpy_dep],
	c_args : common_cargs + flags,

Important

In pixi/conda environments, these paths are absolute (e.g., .pixi/envs/default/lib/python3.14/site-packages/numpy/_core/include).

Warning

Meson doesn't allow absolute paths in include_directories() when they point to locations that appear to be within the source tree.

Solution

Instead of adding numpy/f2py include paths via include_directories(), pass them as compiler arguments (c_args):

numpy_cflag = [numpy_dep.get_variable('cflags').split()[0]]
...
f2py_cflag = ['-I' + f2py_inc]
...
common_cargs = numpy_cflag + f2py_cflag

This allows absolute paths while maintaining compatibility with both traditional pip installs and conda/pixi environments.

[StFroese]

Since this does not effect the builds on pypi that users install, I suggest to not bump the version to 0.10.1