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/ld/CMakeLists.txt

@@ -1,3 +1,6 @@
+cmake_minimum_required(VERSION 3.31)
+project(ld C ASM)
+
 file(GLOB c_sources *.c *.h)
 file(GLOB arch_sources arch/${CMAKE_SYSTEM_PROCESSOR}/*.S)
 
@@ -7,9 +10,11 @@ set_target_properties(ld PROPERTIES
 	OUTPUT_NAME "ld64"
 	SUFFIX ".so")
 
+set(libc_deps
+	libc-core.a libc-malloc.a libc-io.a)
 target_link_libraries(ld
-	libc-core libc-malloc libc-io libmagenta librosetta libxpc-static
-	interface::fs)
+	"$<LINK_GROUP:cross_refs,${libc_deps}>"
+	libmagenta.a librosetta.a -l:libxpc.a)
 
 target_compile_options(ld PRIVATE
 	-fvisibility=hidden
@@ -19,10 +24,4 @@ target_link_options(ld PRIVATE
 	# -Wl,--entry="_ld_start"
 	-T ${CMAKE_CURRENT_SOURCE_DIR}/arch/${CMAKE_SYSTEM_PROCESSOR}/layout.ld
 	-fPIC -nostdlib -ffreestanding -Wl,-shared)
-
-sysroot_add_program(
-	NAME ld
-	BIN_DIR /lib)
-bsp_add_program(
-	NAME ld
-	BIN_DIR /lib)
+install(TARGETS ld DESTINATION lib)

sys/ld/ld.seed

@@ -0,0 +1,23 @@
+[seed]
+name = 'ld'
+
+[dependency]
+no_standard_dependencies = true
+seeds = [
+	'libc-core',
+	'libc-malloc',
+	'libc-io',
+	'libc-headers',
+	'libxpc-static',
+	'libmagenta',
+	'librosetta',
+	'librosetta-interface',
+]
+
+[build]
+build_system = 'cmake'
+
+[install]
+prefix = "/"
+
+# vim: ft=toml