meta: replace cmake mono-build system with a custom build co-ordinator

every system component now has its own self-contained build system, and a
seed file describing the component and its build system and dependencies.

a new tool, meadow, collects and uses these seed files to build the
components into a full system. meadow also manages the target system root
and a host prefix where toolchain tools are installed to.

the build system has also been updated to use a new $ARCH-rosetta-gcc
compiler, and the patches files necessary to build it have been
added to toolchain/cross-compiler.

services/devmd/CMakeLists.txt

@@ -1,15 +1,7 @@
-file(GLOB sources *.c)
-rosetta_add_service(
-	NAME devmd
-	SOURCES ${sources}
-	CFG_FILE ${CMAKE_CURRENT_SOURCE_DIR}/devmd.service)
-target_link_libraries(devmd libc libc-runtime)
+cmake_minimum_required(VERSION 3.31)
+project(devmd C)
 
-sysroot_add_service(
-	NAME devmd
-	BIN_DIR /usr/bin
-	SVC_DIR /etc/herdd/services)
-bsp_add_service(
-	NAME devmd
-	BIN_DIR /usr/bin
-	SVC_DIR /etc/herdd/services)
+file(GLOB sources *.c)
+add_executable(devmd ${sources})
+target_link_libraries(devmd c -l:crt0.o)
+install(TARGETS devmd)

services/devmd/devmd.seed

@@ -0,0 +1,10 @@
+[seed]
+name = 'devmd'
+
+[build]
+build_system = 'cmake'
+
+[install]
+"/etc/herdd/services" = [ 'src:devmd.service' ]
+
+# vim: ft=toml