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.

sys/bootstrap/CMakeLists.txt

@@ -1,15 +1,19 @@
+cmake_minimum_required(VERSION 3.31)
+project(bootstrap C ASM)
+
 file(GLOB c_sources *.c *.h)
 file(GLOB arch_sources arch/${CMAKE_SYSTEM_PROCESSOR}/*.S)
 
 add_executable(bootstrap ${c_sources} ${arch_sources})
 
+set(static_deps
+	magenta rosetta
+	libc-core.a libc-malloc.a libc-io.a
+	libfs.a
+	liblaunch.a
+	libxpc.a)
 target_link_libraries(bootstrap
-	libmagenta librosetta
-	libc-core libc-malloc libc-pthread
-	libfs-static
-	liblaunch-static
-	libxpc-static
-	interface::fs)
+	"$<LINK_GROUP:cross_refs,${static_deps}>")
 
 target_compile_options(bootstrap PRIVATE
 	-fno-stack-protector -nostdlib -ffreestanding -fno-PIC)
@@ -17,3 +21,4 @@ target_link_options(bootstrap PRIVATE
 	-static -nostdlib -ffreestanding)
 
 set_target_properties(bootstrap PROPERTIES POSITIION_INDEPENDENT_CODE FALSE)
+install(TARGETS bootstrap DESTINATION boot)

sys/bootstrap/bootstrap.seed

@@ -0,0 +1,24 @@
+[seed]
+name = 'bootstrap'
+
+[dependency]
+no_standard_dependencies = true
+seeds = [
+	'libmagenta',
+	'librosetta',
+	'libc-core',
+	'libc-malloc',
+	'libc-pthread',
+	'libfs-static',
+	'liblaunch-static',
+	'libxpc-static',
+	'librosetta-interface',
+]
+
+[build]
+build_system = 'cmake'
+
+[install]
+prefix = "/"
+
+# vim: ft=toml