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.

lib/libc/pthread/CMakeLists.txt

@@ -1,4 +1,7 @@
-set(pthread_source_dirs thread)
+cmake_minimum_required(VERSION 3.31)
+project(libc-pthread C ASM)
+
+set(pthread_source_dirs thread mutex)
 
 foreach (dir ${pthread_source_dirs})
 	file(GLOB dir_sources ${CMAKE_CURRENT_SOURCE_DIR}/${dir}/*.c)
@@ -17,30 +20,27 @@ set(pthread_sources ${pthread_sources} ${pthread_sys_sources})
 set(pthread_headers ${pthread_headers} ${CMAKE_CURRENT_SOURCE_DIR}/include/pthread.h)
 set(pthread_public_include_dir ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
-rosetta_add_library(STATIC
-	NAME libc-pthread
-	PUBLIC_INCLUDE_DIRS ${pthread_public_include_dir}
-	SOURCES ${pthread_sources}
-	HEADERS ${pthread_headers})
-rosetta_add_library(SHARED
-	NAME libpthread
-	PUBLIC_INCLUDE_DIRS ${pthread_public_include_dir}
-	SOURCES ${pthread_sources}
-	HEADERS ${pthread_headers})
+if (PTHREAD_STATIC)
+	add_library(libc-pthread STATIC ${pthread_sources} ${pthread_headers})
+	target_link_libraries(libc-pthread PRIVATE libc-io libmagenta)
+	target_include_directories(libc-pthread PUBLIC
+		${public_include_dirs}
+		${CMAKE_CURRENT_SOURCE_DIR}/include)
+	set_target_properties(libc-pthread PROPERTIES PREFIX "")
+	target_compile_definitions(libc-pthread PRIVATE ENABLE_GLOBAL_HEAP=1 BUILD_STATIC=1)
+	install(TARGETS libc-pthread)
+else ()
+	add_library(libpthread SHARED ${pthread_sources} ${pthread_headers})
+	target_link_libraries(libpthread PRIVATE magenta)
+	target_link_libraries(libpthread PUBLIC c)
+	target_include_directories(libpthread PUBLIC
+		${public_include_dirs}
+		${CMAKE_CURRENT_SOURCE_DIR}/include)
+	set_target_properties(libpthread PROPERTIES PREFIX "")
+	target_compile_options(libpthread PRIVATE -ffreestanding -nostdlib)
+	target_link_options(libpthread PRIVATE -ffreestanding -nostdlib)
+	target_compile_definitions(libpthread  PRIVATE ENABLE_GLOBAL_HEAP=1 BUILD_SHARED=1)
+	install(TARGETS libpthread)
+endif ()
 
-sysroot_add_library(
-	NAME libc-pthread
-	HEADER_DIR /usr/include
-	LIB_DIR /usr/lib)
-sysroot_add_library(
-	NAME libpthread
-	HEADER_DIR /usr/include
-	LIB_DIR /usr/lib)
-
-bsp_add_library(
-	NAME libpthread
-	LIB_DIR /usr/lib)
-
-target_link_libraries(libc-pthread PRIVATE libc-io libmagenta)
-target_link_libraries(libpthread PRIVATE libmagenta)
-target_link_libraries(libpthread PUBLIC libc)
+install(FILES include/pthread.h DESTINATION include)

lib/libc/pthread/libc-pthread.seed

@@ -0,0 +1,17 @@
+[seed]
+name = 'libc-pthread'
+
+[dependency]
+no_standard_dependencies = true
+seeds = [
+	'libmagenta',
+	'libc-io'
+]
+
+[build]
+build_system = 'cmake'
+configure_args = [
+	'-DPTHREAD_STATIC=TRUE'
+]
+
+# vim: ft=toml

lib/libc/pthread/libpthread.seed

@@ -0,0 +1,7 @@
+[seed]
+name = 'libpthread'
+
+[build]
+build_system = 'cmake'
+
+# vim: ft=toml