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, 30 insertions, 0 deletions

diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
new file mode 100644
index 00000000..609da54a
--- /dev/null
+++ b/src/ipcpd/CMakeLists.txt
@@ -0,0 +1,30 @@
+# IPCP (IPC Process) daemons build configuration
+# Configuration options and validation are in cmake/config/ipcp/*.cmake
+
+# Common sources shared by all IPCPs (absolute paths for subdirectories)
+set(IPCP_SOURCES
+  ${CMAKE_CURRENT_SOURCE_DIR}/ipcp.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/shim-data.c
+)
+
+set(COMMON_SOURCES
+  ${CMAKE_CURRENT_SOURCE_DIR}/common/enroll.c
+)
+
+set(IPCP_INCLUDE_DIRS
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_SOURCE_DIR}/include
+  ${CMAKE_BINARY_DIR}/include
+)
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/config.h.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/config.h" @ONLY)
+
+add_subdirectory(local)
+add_subdirectory(broadcast)
+add_subdirectory(unicast)
+if(HAVE_ETH)
+  add_subdirectory(eth)
+endif()
+add_subdirectory(udp)