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, 45 insertions, 0 deletions

diff --git a/cmake/config/global.cmake b/cmake/config/global.cmake
new file mode 100644
index 00000000..243e1ba0
--- /dev/null
+++ b/cmake/config/global.cmake
@@ -0,0 +1,45 @@
+# Global configuration options for Ouroboros
+# These options affect the entire framework
+
+# Installation directories
+set(OUROBOROS_CONFIG_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}/ouroboros" CACHE PATH
+  "Configuration directory")
+
+# Security directories
+set(OUROBOROS_SECURITY_DIR "${OUROBOROS_CONFIG_DIR}/security" CACHE PATH
+  "Security directory holding authentication information")
+set(OUROBOROS_CA_CRT_DIR "${OUROBOROS_SECURITY_DIR}/cacert" CACHE PATH
+  "Directory holding trusted CA certificates")
+set(OUROBOROS_SRV_CRT_DIR "${OUROBOROS_SECURITY_DIR}/server" CACHE PATH
+  "Directory holding server certificates")
+set(OUROBOROS_CLI_CRT_DIR "${OUROBOROS_SECURITY_DIR}/client" CACHE PATH
+  "Directory holding client certificates")
+set(OUROBOROS_UNTRUSTED_DIR "${OUROBOROS_SECURITY_DIR}/untrusted" CACHE PATH
+  "Directory holding untrusted intermediate certificates")
+
+# Shared memory naming
+set(SHM_PREFIX "ouroboros" CACHE STRING
+  "String to prepend to POSIX shared memory filenames")
+set(SHM_LOCKFILE_NAME "/${SHM_PREFIX}.lockfile" CACHE INTERNAL
+  "Filename for the POSIX shared memory lockfile")
+
+# FUSE configuration
+if(HAVE_FUSE)
+  set(FUSE_PREFIX "/tmp/ouroboros" CACHE STRING
+    "Mountpoint for RIB filesystem")
+endif()
+
+# Secure memory configuration
+set(IRMD_SECMEM_MAX 1048576 CACHE STRING "IRMd secure heap size")
+set(PROC_SECMEM_MAX 1048576 CACHE STRING "Process secure heap size")
+set(SECMEM_GUARD 32 CACHE STRING "Secure heap min size")
+
+# Container/deployment options
+set(BUILD_CONTAINER FALSE CACHE BOOL
+  "Disable thread priority setting for container compatibility")
+set(DISABLE_CORE_LOCK TRUE CACHE BOOL
+  "Disable locking performance threads to a core")
+
+# IPC socket configuration
+set(SOCK_BUF_SIZE 10240 CACHE STRING
+  "Size of the buffer used by the UNIX sockets for local IPC")