build: Refactor CMake back to in-tree CMakeListsbe

This moves the build definitions back to src/ subdirectories
(CMakeLists.txt per component). Configuration and dependencies are
kept out of tree. Configuration options are bundled into cmake/config/
modules. Dependencies are grouped by component (system/, crypt/, eth/,
coverage/, etc.). It now consistently uses target-based commands
(target_include_directories, target_link_libraries) instead of global
include_directories(). Proper PRIVATE/PUBLIC visibility for executable
link libraries. CONFIG_OUROBOROS_DEBUG now properly set based on being
a valid debug config (not just checking the string name).

It also adds OuroborosTargets export for find_package() support and
CMake package config files (OuroborosConfig.cmake) for easier
integration with CMake projects.

The build logic now follows more idiomatic CMake practices with
configuration separated from target definitions.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 23 insertions, 0 deletions

diff --git a/cmake/OuroborosConfig.cmake.in b/cmake/OuroborosConfig.cmake.in
new file mode 100644
index 00000000..41ff7fdd
--- /dev/null
+++ b/cmake/OuroborosConfig.cmake.in
@@ -0,0 +1,23 @@
+# Ouroboros CMake Package Configuration
+#
+# This file allows other CMake projects to find and use Ouroboros libraries
+# via find_package(Ouroboros).
+#
+# Exported targets:
+#   Ouroboros::dev - Development library (libouroboros-dev)
+#   Ouroboros::irm - IRM management library (libouroboros-irm)
+#
+# Example usage:
+#   find_package(Ouroboros REQUIRED)
+#   target_link_libraries(myapp Ouroboros::dev)
+
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+
+# Required dependencies for Ouroboros libraries
+find_dependency(Threads)
+
+include("${CMAKE_CURRENT_LIST_DIR}/OuroborosTargets.cmake")
+
+check_required_components(Ouroboros)