# Unit test build can't find library:

Missing dependency at link time

```
set(SELF_EXE mumble)
set(SELF_SRCS mumble.cpp)

xo_add_executable(${SELF_EXE} ${SELF_SRCS})
xo_self_dependency(${SELF_EXE} xo_foo)
```

and build fails with `cannot find -lxo_bar`.

Possible causes:

1. missing cmake export for a dependency of `xo_foo`.
   Check `xo_foo/cmake/xo_fooConfig.cmake.in`:

   If `xo_foo` depends on `xo_bar`,  then cmake export
   needs to have `find_dependency(xo_bar)`

```
@PACKAGE_INIT@

include(CMakeFindDependencyMacro)
find_dependency(xo_bar)
find_dependency(xo_maybemoar)

include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
check_required_components("@PROJECT_NAME@")
```

# Howto introduce sphinx documentation to an XO project

REMINDER: must re-run `cmake` after introducing skeleton, since build copies files from docs/ to .build directory

Minimal skeleton for docs/ directory:

```
xo-foo
+- docs
   +- CMakeLists.txt
   +- conf.py
   +- _static
   +- index.rst
```

CMakeLists.txt:
```
# xo-foo/docs/CMakeLists.txt

xo_doxygen_collect_deps()
xo_docdir_doxygen_config()
xo_docdir_sphinx_config(
    index.rst
)
```

conf.py:
```
# Configuration file for the Sphinx documentation builder.
#
# For the full list of built-in configuration values, see the documentation:
# https://www.sphinx-doc.org/en/master/usage/configuration.html

# -- Project information -----------------------------------------------------
# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information

project = 'xo jit documentation'
copyright = '2024, Roland Conybeare'
author = 'Roland Conybeare'

# -- General configuration ---------------------------------------------------
# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration

#extensions = []
extensions = [ "breathe",
               "sphinx.ext.mathjax",     # inline math
               "sphinx.ext.autodoc",     # generate info from docstrings
               "sphinxcontrib.ditaa",    # diagrams-through-ascii-art
               "sphinxcontrib.plantuml"  # text -> uml diagrams
              ]

# note: breathe requires doxygen xml output -> must have GENERATE_XML = YES in Doxyfile.in
#       match project name in Doxyfile.in
breathe_default_project = "xodoxxml"

templates_path = ['_templates']
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']

pygments_style = 'sphinx'

# -- Options for HTML output -------------------------------------------------
# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output

#html_theme = 'alabaster'
html_theme = 'sphinx_rtd_theme'
html_static_path = ['_static']
html_favicon = '_static/img/favicon.ico'
```

index.rst:
```
xo-foo documentation
====================

text here

.. toctree::
   :maxdepth: 2
   :caption: xo-foo contents

   genindex
   search
```

_static:

copy from xo-unit/docs/_static.  Just need .ico