Building DPM Core

Prerequisites

GCC/G++ supporting C++20
CMake 3.22 or later
Make
Doxygen (optional, for the code reference)
pdflatex and makeindex (optional, for the PDF code reference)

The library itself depends only on libc, libstdc++, and libdl, so it builds and runs on a minimal system.

Building for development

cmake -B <build-dir> -DCMAKE_BUILD_TYPE=Debug
cmake --build <build-dir>

Artifacts land in:

<build-dir>/bin/dpm             the CLI
<build-dir>/lib/libdpm-core.so  the core library
<build-dir>/modules/info.so     the bundled info module

The dpm binary built here finds the locally built libdpm-core.so on its own — an embedded library search path points it at the lib/ directory next to it in the build tree, so running it directly uses the core you just built with nothing to set up first. This is only the default: LD_LIBRARY_PATH takes precedence over the embedded path, so the binary can be pointed at any other core, including the system-installed one.

Running the tests

ctest --test-dir <build-dir> --output-on-failure

This runs the core API test binary (which exercises the full load-time validation matrix against the fixture modules in tests/fixtures/) and the CLI end-to-end tests.

Running the CLI from the build tree

The build tree plus the test fixtures form a complete self-contained environment; no installation is required. Point the CLI at local paths with its override flags:

<build-dir>/bin/dpm --config-dir ./tests/fixtures/conf --module-path <build-dir>/modules info version

The flags --config-dir, --module-path, --root, and --log-level each redirect the corresponding system default; --root sets the target root that package-operation modules act on.

Generating the code reference

When Doxygen is present, the build offers a docs target that generates the API and source reference from the documentation comments carried in the headers and sources. Two output formats are available as configure-time options:

-DDPM_DOCS_PDF (default ON) — PDF reference, via Doxygen's native LaTeX output; requires pdflatex and makeindex
-DDPM_DOCS_HTML (default OFF) — HTML reference

Generate and compile the PDF reference:

cmake --build <build-dir> --target docs-pdf

The PDF lands at /docs/latex/refman.pdf.

With DPM_DOCS_HTML enabled at configure time, the docs target additionally produces the HTML reference in /docs/html:

cmake -B <build-dir> -DDPM_DOCS_HTML=ON
cmake --build <build-dir> --target docs

Building, testing, and installing a release

One build tree carries the whole sequence — the test suite builds and runs in any configuration, so the artifacts that get tested are the artifacts that get installed:

cmake -B <build-dir> -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr
cmake --build <build-dir>
ctest --test-dir <build-dir> --output-on-failure
cmake --install <build-dir>

This is the packaging flow: configure once, build once, test what was built, install what was tested. Omit -DCMAKE_INSTALL_PREFIX=/usr for a /usr/local install. Under the install prefix this installs:

bin/dpm                   the CLI
lib/libdpm-core.so        the core library
lib/dpm/modules/info.so   the bundled info module
include/dpm/              the public header

Core configuration installs to /etc/dpm/conf.d/core.conf regardless of prefix.

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