Simpify startup of dynamically linked binaries

This patch removes the component_entry_point library, which used to
proved a hook for the libc to intercept the call of the
'Component::construct' function. The mechansim has several shortcomings
(see the discussion in the associated issue) and was complex. So we
eventually discarded the approach in favor of the explicit handling of
the startup.

A regular Genode component provides a 'Component::construct' function,
which is determined by the dynamic linker via a symbol lookup.
For the time being, the dynamic linker falls back to looking up a 'main'
function if no 'Component::construct' function could be found.

The libc provides an implementation of 'Component::construct', which
sets up the libc's task handling and finally call the function
'Libc::Component::construct' from the context of the appllication task.
This function is expected to be provided by the libc-using application.
Consequently, Genode components that use the libc have to implement the
'Libc::Component::construct' function.

The new 'posix' library provides an implementation of
'Libc::Component::construct' that calls a main function. Hence, POSIX
programs that merely use the POSIX API merely have to add 'posix' to the
'LIBS' declaration in their 'target.mk' file. Their execution starts at
'main'.

Issue #2199

repos/base-hw/lib/mk/core-hw.inc

@@ -43,7 +43,6 @@ SRC_CC += env.cc
 SRC_CC += region_map_support.cc
 SRC_CC += pager.cc
 SRC_CC += _main.cc
-SRC_CC += component_construct.cc
 SRC_CC += kernel/cpu_scheduler.cc
 SRC_CC += kernel/double_list.cc
 SRC_CC += kernel/init.cc

repos/base-linux/src/lib/lx_hybrid/lx_hybrid.cc

@@ -78,16 +78,6 @@ namespace Genode {
 	extern void bootstrap_component();
 	extern void call_global_static_constructors();
 
-	/*
-	 * Hook for intercepting the call of the 'Component::construct' method. By
-	 * hooking this function pointer in a library constructor, the libc is able
-	 * to create a task context for the component code. This context is
-	 * scheduled by the libc in a cooperative fashion, i.e. when the
-	 * component's entrypoint is activated.
-	 */
-
-	extern void (*call_component_construct)(Genode::Env &) __attribute__((weak));
-
 	/*
 	 * This function is normally provided by the cxx library, which is not
 	 * used for lx_hybrid programs. For lx_hybrid programs, the exception
@@ -96,13 +86,6 @@ namespace Genode {
 	void init_exception_handling(Env &) { }
 }
 
-static void lx_hybrid_component_construct(Genode::Env &env)
-{
-	Component::construct(env);
-}
-
-void (*Genode::call_component_construct)(Genode::Env &) = &lx_hybrid_component_construct;
-
 /*
  * Static constructors are handled by the Linux startup code - so implement
  * this as empty function.

repos/base/lib/import/import-base.mk

@@ -1,6 +0,0 @@
-#
-# All dynamic executables must be linked to the component entry-point library
-# (a trampoline for component startup from ldso), so, enforce the library
-# dependency here.
-#
-LIBS += component_entry_point

repos/base/lib/import/import-ld.mk

@@ -1 +0,0 @@
-include $(BASE_DIR)/lib/import/import-base.mk

repos/base/lib/mk/component_entry_point.mk

@@ -1,7 +0,0 @@
-#
-# Component entry point (a trampoline for component startup from ldso)
-#
-
-SRC_CC = component_entry_point.cc component_construct.cc
-
-vpath %.cc $(REP_DIR)/src/lib/startup

repos/base/lib/mk/ld-platform.inc

@@ -38,8 +38,6 @@ ENTRY_POINT = _start
 LD_OPT     += -T$(DIR)/linker.ld
 endif
 
-include $(BASE_DIR)/lib/import/import-ld.mk
-
 vpath %.cc $(DIR)
 
 # vi:ft=make

repos/base/lib/mk/platform.mk

@@ -1 +0,0 @@
-LIBS = component_entry_point

repos/base/lib/mk/startup.inc

@@ -1,5 +1,5 @@
 SRC_S       += crt0.s
-SRC_CC      += _main.cc init_main_thread.cc component_construct.cc
+SRC_CC      += _main.cc init_main_thread.cc
 REP_INC_DIR += src/include
 LIBS        += syscall
 

repos/base/lib/symbols/ld

@@ -184,7 +184,6 @@ _ZN6Genode18Signal_transmitterC1ENS_10CapabilityINS_14Signal_contextEEE T
 _ZN6Genode18Signal_transmitterC2ENS_10CapabilityINS_14Signal_contextEEE T
 _ZN6Genode18server_socket_pairEv T
 _ZN6Genode20env_session_id_spaceEv T
-_ZN6Genode21component_entry_pointERNS_3EnvE T
 _ZN6Genode25env_stack_area_region_mapE B
 _ZN6Genode26env_stack_area_ram_sessionE B
 _ZN6Genode29upgrade_pd_quota_non_blockingEm T

repos/base/mk/dep_lib.mk

@@ -106,11 +106,9 @@ endif
 #
 ifeq ($(LIBS),)
 ifneq ($(LIB),platform)
-ifneq ($(LIB),component_entry_point)
 LIBS += platform
 endif
 endif
-endif
 
 #
 # Check if the requirements of the target are satisfied

repos/base/mk/lib.mk

@@ -159,7 +159,7 @@ $(LIB_RLIB):  $(OBJECTS)
 #
 ifdef SHARED_LIB
 ifneq ($(LIB_IS_DYNAMIC_LINKER),yes)
-override DEPS := $(filter-out $(BASE_LIBS:=.lib) component_entry_point.lib,$(DEPS))
+override DEPS := $(filter-out $(BASE_LIBS:=.lib),$(DEPS))
 endif
 endif
 

repos/base/mk/prg.mk

@@ -110,14 +110,8 @@ LD_CMD ?= $(CXX)
 LD_CMD += $(CXX_LINK_OPT)
 
 ifeq ($(SHARED_LIBS),)
+FILTER_DEPS := $(DEPS:.lib=)
 LD_SCRIPTS  := $(LD_SCRIPT_STATIC)
-
-#
-# Filter out the component-entry-point library since its not used for static
-# binaries
-#
-FILTER_DEPS := $(filter-out component_entry_point,$(DEPS:.lib=))
-
 else
 
 #
@@ -135,13 +129,6 @@ LD_CMD      += -Wl,--dynamic-linker=$(DYNAMIC_LINKER).lib.so \
 FILTER_DEPS := $(filter-out $(BASE_LIBS),$(DEPS:.lib=))
 SHARED_LIBS += $(LIB_CACHE_DIR)/$(DYNAMIC_LINKER)/$(DYNAMIC_LINKER).lib.so
 
-
-#
-# Link all dynamic executables to the component entry-point library (a
-# trampoline for component startup from ldso)
-#
-FILTER_DEPS += component_entry_point
-
 #
 # Build program position independent as well
 #

repos/base/src/ld/genode_dyn.dl

@@ -13,4 +13,7 @@
 	_ctors_end;
 	_dtors_start;
 	_dtors_end;
+	_ZN9Component9constructERN6Genode3EnvE;
+	_ZN9Component10stack_sizeEv;
+	main;
 };

repos/base/src/ld/genode_dyn.ld

@@ -11,14 +11,10 @@
  * under the terms of the GNU General Public License version 2.
  */
 
-
 /*
- * Components don't need to startup with CRT0 as LDSO has done this
- * initialization during its own CRT0 already. The component always starts at
- * Genode::component_entry_point() as a trampoline to
- * call_component_construct().
+ * The entry point of dynamically linked components is unused. The dynamic
+ * linker determines the 'Component::construct' function via a symbol lookup.
  */
-ENTRY(_ZN6Genode21component_entry_pointERNS_3EnvE)
 
 PHDRS
 {
@@ -37,10 +33,21 @@ SECTIONS
   {
     _prog_img_beg = .;
 
-    /* put entry code at the start of the text segment / raw binary */
-    *(.text._ZN6Genode21component_entry_pointERNS_3EnvE)
+    /*
+     * The ELF entry point is unused for dynamically linked components. The
+     * dynamic linker determined the entry point by looking up the symbol of
+     * the 'Component::construct' function or - if it does not exist - the
+     * 'main' function (for legacy components).
+     *
+     * \deprecated  The support for legacy main functions will be removed.
+     *
+     * The 'KEEP' directive prevents text that is reachable from one of the
+     * possible entry points from being garbage collected.
+     */
+    KEEP(*(.text._ZN9Component9constructERN6Genode3EnvE .text.main))
 
-    *(.text .stub .text.* .gnu.linkonce.t.*)
+    *(.text
+      .stub .text.* .gnu.linkonce.t.*)
     /* .gnu.warning sections are handled specially by elf32.em.  */
     *(.gnu.warning)
   } : ro =0x0

repos/base/src/lib/base/component.cc

@@ -152,6 +152,10 @@ namespace Genode {
 }
 
 
+Genode::size_t Component::stack_size() __attribute__((weak));
+Genode::size_t Component::stack_size() { return 64*1024; }
+
+
 /*
  * We need to execute the constructor of the main entrypoint from a
  * class called 'Startup' as 'Startup' is a friend of 'Entrypoint'.

repos/base/src/lib/base/entrypoint.cc

@@ -31,8 +31,6 @@ namespace Genode {
 	extern bool inhibit_tracing;
 	void call_global_static_constructors();
 	void destroy_signal_thread();
-
-	extern void (*call_component_construct)(Genode::Env &);
 }
 
 
@@ -152,7 +150,7 @@ namespace {
 
 			Genode::call_global_static_constructors();
 
-			Genode::call_component_construct(env);
+			Component::construct(env);
 		}
 	};
 }

repos/base/src/lib/ldso/main.cc

@@ -317,6 +317,20 @@ Linker::Ld &Linker::Ld::linker()
 }
 
 
+/*
+ * Defined in the startup library, passed to legacy main functions.
+ */
+extern char **genode_argv;
+extern int    genode_argc;
+extern char **genode_envp;
+
+void genode_exit(int status);
+
+static int exit_status;
+
+static void exit_on_suspended() { genode_exit(exit_status); }
+
+
 /**
  * The dynamic binary to load
  */
@@ -348,16 +362,26 @@ struct Linker::Binary : Root_object, Elf_object
 
 	Elf::Addr lookup_symbol(char const *name)
 	{
-		Elf::Sym const *symbol = 0;
-
-		if ((symbol = Elf_object::lookup_symbol(name, Hash_table::hash(name))))
-			return reloc_base() + symbol->st_value;
-
-		return 0;
+		try {
+			Elf::Addr base = 0;
+			Elf::Sym const *sym = Linker::lookup_symbol(name, dynamic().dep(), &base);
+			return base + sym->st_value;
+		}
+		catch (Linker::Not_found) { return 0; }
 	}
 
 	void call_entry_point(Env &env)
 	{
+		/* apply the component-provided stack size */
+		if (Elf::Addr addr = lookup_symbol("_ZN9Component10stack_sizeEv")) {
+
+			/* call 'Component::stack_size()' */
+			size_t const stack_size = ((size_t(*)())addr)();
+
+			/* expand stack according to the component's needs */
+			Thread::myself()->stack_size(stack_size);
+		}
+
 		/* call static construtors and register destructors */
 		Func * const ctors_start = (Func *)lookup_symbol("_ctors_start");
 		Func * const ctors_end   = (Func *)lookup_symbol("_ctors_end");
@@ -367,13 +391,33 @@ struct Linker::Binary : Root_object, Elf_object
 		Func * const dtors_end   = (Func *)lookup_symbol("_dtors_end");
 		for (Func * dtor = dtors_start; dtor != dtors_end; genode_atexit(*dtor++));
 
-		/* call component entry point */
-		/* XXX the function type for call_component_construct() is a candidate
-		 * for a base-internal header */
-		typedef void (*Entry)(Env &);
-		Entry const entry = reinterpret_cast<Entry>(_file->entry);
+		/* call 'Component::construct' function if present */
+		if (Elf::Addr addr = lookup_symbol("_ZN9Component9constructERN6Genode3EnvE")) {
+			((void(*)(Env &))addr)(env);
+			return;
+		}
 
-		entry(env);
+		/*
+		 * The 'Component::construct' function is missing. This may be the
+		 * case for legacy components that still implement a 'main' function.
+		 *
+		 * \deprecated  the handling of legacy 'main' functions will be removed
+		 */
+		if (Elf::Addr addr = lookup_symbol("main")) {
+			warning("using legacy main function, please convert to 'Component::construct'");
+
+			exit_status = ((int (*)(int, char **, char **))addr)(genode_argc,
+			                                                     genode_argv,
+			                                                     genode_envp);
+
+			/* trigger suspend in the entry point */
+			env.ep().schedule_suspend(exit_on_suspended, nullptr);
+
+			/* return to entrypoint and exit via exit_on_suspended() */
+			return;
+		}
+
+		error("dynamic linker: component-entrypoint lookup failed");
 	}
 
 	void relocate(Bind bind) override
@@ -486,7 +530,6 @@ Elf::Sym const *Linker::lookup_symbol(char const *name, Dependency const &dep,
 		if (binary_ptr && &dep != binary_ptr->first_dep()) {
 			return lookup_symbol(name, *binary_ptr->first_dep(), base, undef, other);
 		} else {
-			error("LD: could not lookup symbol \"", name, "\"");
 			throw Not_found();
 		}
 	}

repos/base/src/lib/startup/_main.cc

@@ -250,3 +250,24 @@ extern "C" int _main()
 	/* never reached */
 	return 0;
 }
+
+
+static int exit_status;
+static void exit_on_suspended() { genode_exit(exit_status); }
+
+
+extern int main(int argc, char **argv, char **envp);
+
+
+void Component::construct(Genode::Env &env) __attribute__((weak));
+void Component::construct(Genode::Env &env)
+{
+	/* call real main function */
+	exit_status = main(genode_argc, genode_argv, genode_envp);
+
+	/* trigger suspend in the entry point */
+	env.ep().schedule_suspend(exit_on_suspended, nullptr);
+
+	/* return to entrypoint and exit via exit_on_suspended() */
+}
+

repos/base/src/lib/startup/component_construct.cc

@@ -1,88 +0,0 @@
-/*
- * \brief   Startup code for component construction
- * \author  Christian Helmuth
- * \date    2016-01-21
- *
- * The component construction code is used by the startup library, which is
- * linked to static binaries and ld.lib.so. The code is also used by the
- * component_entry_point static library, which is linked to all dynamic
- * executables to make the fallback implementation and the
- * call_component_construct-hook function pointer available to these binaries.
- *
- * Note, for dynamic binaries we can't refer to the default implementation in
- * ld.lib.so as it is a component itself implementing the Component functions.
- */
-
-/*
- * Copyright (C) 2016 Genode Labs GmbH
- *
- * This file is part of the Genode OS framework, which is distributed
- * under the terms of the GNU General Public License version 2.
- */
-
-/* Genode includes */
-#include <base/component.h>
-
-
-namespace Genode {
-
-	/*
-	 * Hook for intercepting the call of the 'Component::construct' method. By
-	 * hooking this function pointer in a library constructor, the libc is able
-	 * to create a task context for the component code. This context is
-	 * scheduled by the libc in a cooperative fashion, i.e. when the
-	 * component's entrypoint is activated.
-	 */
-
-	extern void (*call_component_construct)(Genode::Env &) __attribute__((weak));
-}
-
-static void default_component_construct(Genode::Env &env)
-{
-	Component::construct(env);
-}
-
-void (*Genode::call_component_construct)(Genode::Env &) = &default_component_construct;
-
-
-/****************************************************
- ** Fallback implementation of Component interface **
- ****************************************************/
-
-extern void genode_exit(int status);
-
-static int exit_status;
-
-static void exit_on_suspended() { genode_exit(exit_status); }
-
-/*
- * Regular components provide the 'Component' interface as defined in
- * base/component.h. This fallback accommodates legacy components that lack the
- * implementation of this interface but come with a main function.
- */
-
-/*
- * XXX these symbols reside in the startup library - candidate for
- * base-internal header?
- */
-extern char **genode_argv;
-extern int    genode_argc;
-extern char **genode_envp;
-
-extern int main(int argc, char **argv, char **envp);
-
-void Component::construct(Genode::Env &env) __attribute__((weak));
-void Component::construct(Genode::Env &env)
-{
-	/* call real main function */
-	exit_status = main(genode_argc, genode_argv, genode_envp);
-
-	/* trigger suspend in the entry point */
-	env.ep().schedule_suspend(exit_on_suspended, nullptr);
-
-	/* return to entrypoint and exit via exit_on_suspended() */
-}
-
-
-Genode::size_t Component::stack_size() __attribute__((weak));
-Genode::size_t Component::stack_size() { return 64*1024; }

repos/base/src/lib/startup/component_entry_point.cc

@@ -1,32 +0,0 @@
-/*
- * \brief   Component entry point for dynamic executables
- * \author  Christian Helmuth
- * \date    2016-01-21
- *
- * The ELF entry point of dynamic binaries is set to component_entry_point(),
- * which calls the call_component_construct-hook function pointer.
- */
-
-/*
- * Copyright (C) 2016 Genode Labs GmbH
- *
- * This file is part of the Genode OS framework, which is distributed
- * under the terms of the GNU General Public License version 2.
- */
-
-/* Genode includes */
-#include <base/component.h>
-
-
-/* FIXME move to base-internal header */
-namespace Genode {
-	extern void (*call_component_construct)(Env &);
-}
-
-namespace Genode {
-
-	void component_entry_point(Genode::Env &env)
-	{
-		call_component_construct(env);
-	}
-}

repos/dde_linux/src/drivers/wifi/main.cc

@@ -12,7 +12,7 @@
  */
 
 /* Genode includes */
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/heap.h>
 #include <base/log.h>
 #include <base/sleep.h>
@@ -254,4 +254,4 @@ struct Main
 };
 
 
-void Component::construct(Genode::Env &env) { static Main server(env); }
+void Libc::Component::construct(Genode::Env &env) { static Main server(env); }

repos/dde_linux/src/test/lxip/http_srv/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-lxip_http_srv
-LIBS     = libc libc_lxip
+LIBS     = posix libc_lxip
 SRC_CC   = main.cc

repos/dde_linux/src/test/lxip/udp_client/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-lxip_udp_client
-LIBS     = libc libc_lxip config
+LIBS     = posix libc_lxip config
 SRC_CC   = main.cc

repos/dde_linux/src/test/lxip/udp_echo/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-lxip_udp_echo
-LIBS     = libc libc_lxip config
+LIBS     = posix libc_lxip config
 SRC_CC   = main.cc

repos/gems/src/app/backdrop/target.mk

@@ -1,3 +1,3 @@
 TARGET = backdrop
 SRC_CC = main.cc
-LIBS   = base config libc libpng zlib blit file
+LIBS   = base config posix libpng zlib blit file

repos/gems/src/app/menu_view/target.mk

@@ -1,6 +1,6 @@
 TARGET   = menu_view
 SRC_CC   = main.cc
-LIBS     = base config libc libpng zlib blit file
+LIBS     = base config posix libpng zlib blit file
 INC_DIR += $(PRG_DIR)
 
 .PHONY: menu_view_styles.tar

repos/gems/src/app/mixer_gui_qt/target.mk

@@ -8,4 +8,4 @@ include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
 
 main_window.o: main_window.moc
 
-LIBS += config qoost
+LIBS += config qoost posix

repos/gems/src/app/themed_decorator/main.cc

@@ -13,7 +13,7 @@
 
 /* Genode includes */
 #include <base/log.h>
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/heap.h>
 #include <base/attached_rom_dataspace.h>
 #include <os/reporter.h>
@@ -317,4 +317,4 @@ void Decorator::Main::_handle_pointer_update()
 }
 
 
-void Component::construct(Genode::Env &env) { static Decorator::Main main(env); }
+void Libc::Component::construct(Genode::Env &env) { static Decorator::Main main(env); }

repos/gems/src/server/file_terminal/target.mk

@@ -1,3 +1,3 @@
 TARGET = file_terminal
 SRC_CC = main.cc
-LIBS   = libc
+LIBS   = posix

repos/gems/src/server/http_blk/main.cc

@@ -16,6 +16,7 @@
 #include <base/attached_rom_dataspace.h>
 #include <base/log.h>
 #include <block/component.h>
+#include <libc/component.h>
 
 /* local includes */
 #include "http.h"
@@ -106,4 +107,4 @@ struct Main
 };
 
 
-void Component::construct(Genode::Env &env) { static Main m(env); }
+void Libc::Component::construct(Genode::Env &env) { static Main m(env); }

repos/gems/src/server/tcp_terminal/target.mk

@@ -1,3 +1,3 @@
 TARGET = tcp_terminal
 SRC_CC = main.cc
-LIBS   = libc libc_lwip_nic_dhcp libc_pipe
+LIBS   = posix libc_lwip_nic_dhcp libc_pipe

repos/gems/src/server/terminal_mux/main.cc

@@ -13,7 +13,7 @@
 
 /* Genode includes */
 #include <base/env.h>
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/heap.h>
 #include <base/session_label.h>
 #include <util/arg_string.h>
@@ -721,4 +721,4 @@ struct Main
 };
 
 
-void Component::construct(Genode::Env &env) { static Main inst(env); }
+void Libc::Component::construct(Genode::Env &env) { static Main inst(env); }

repos/gems/src/test/decorator_stress/target.mk

@@ -1,6 +1,6 @@
 TARGET = test-decorator_stress
 SRC_CC = main.cc
-LIBS   = libc libm
+LIBS   = posix
 
 INC_DIR += $(PRG_DIR)
 

repos/libports/include/libc/component.h

@@ -0,0 +1,48 @@
+/*
+ * \brief  Hook functions for bootstrapping a libc-using Genode component
+ * \author Norman Feske
+ * \date   2016-12-23
+ *
+ * This interface is implemented by components that use both Genode's API and
+ * the libc. For such components, the libc provides the 'Component::construct'
+ * function that takes the precautions needed for letting the application use
+ * blocking I/O via POSIX functions like 'read' or 'select'. The libc's
+ * 'Component::construct' function finally passes control to the application by
+ * calling the application-provided 'Libc::Component::construct' function.
+ */
+
+/*
+ * Copyright (C) 2016 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#ifndef _INCLUDE__LIBC__COMPONENT_H_
+#define _INCLUDE__LIBC__COMPONENT_H_
+
+#include <base/env.h>
+#include <base/stdint.h>
+
+namespace Genode { struct Env; }
+
+
+/**
+ * Interface to be provided by the component implementation
+ */
+namespace Libc { namespace Component {
+
+	/**
+	 * Return stack size of the component's initial entrypoint
+	 */
+	Genode::size_t stack_size();
+
+	/**
+	 * Construct component
+	 *
+	 * \param env  interface to the component's execution environment
+	 */
+	void construct(Genode::Env &env);
+} }
+
+#endif /* _INCLUDE__LIBC__COMPONENT_H_ */

repos/libports/lib/import/import-posix.mk

@@ -0,0 +1,3 @@
+LIBS += libc libm
+
+include $(call select_from_repositories,lib/import/import-libc.mk)

repos/libports/lib/import/import-qt5.inc

@@ -105,7 +105,6 @@ include $(call select_from_repositories,lib/import/import-gallium.mk)
 
 # custom main() thread stack size support via main() wrapper
 ifeq ($(findstring -DQT_MAIN_STACK_SIZE, $(CC_CXX_OPT)), -DQT_MAIN_STACK_SIZE)
-CC_CXX_OPT += -Dmain=qt_main
 SRC_CC += qt_main.cc
 vpath qt_main.cc $(QT5_REP_DIR)/src/lib/qt5
 endif

repos/libports/lib/mk/posix.mk

@@ -0,0 +1,5 @@
+SRC_CC = construct.cc
+
+LIBS += libc
+
+vpath construct.cc $(REP_DIR)/src/lib/posix

repos/libports/run/libc_block.run

@@ -100,7 +100,7 @@ install_config $config
 # generic modules
 set boot_modules {
 	core init timer
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 	test-libc_block
 }
 

repos/libports/run/libc_ffat_fs.run

@@ -104,7 +104,7 @@ install_config $config
 # generic modules
 set boot_modules {
 	core init timer ffat_fs
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 	test-libc_vfs
 }
 

repos/libports/run/libc_filesystem_test.inc

@@ -130,7 +130,7 @@ install_config $config
 # generic modules
 set boot_modules {
 	core init timer
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 }
 
 append boot_modules test-libc_$filesystem

repos/libports/run/libc_pipe.run

@@ -32,7 +32,7 @@ install_config {
 
 build_boot_image {
 	core init test-libc_pipe
-	ld.lib.so libc.lib.so libc_pipe.lib.so pthread.lib.so
+	ld.lib.so libc.lib.so libm.lib.so libc_pipe.lib.so pthread.lib.so
 }
 
 append qemu_args " -nographic -m 64 "

repos/libports/run/libc_vfs.run

@@ -62,7 +62,7 @@ install_config $config
 
 build_boot_image {
 	core init
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 	ram_fs test-libc_vfs
 }
 

repos/libports/run/libc_vfs_fs.run

@@ -65,7 +65,7 @@ install_config $config
 
 build_boot_image {
 	core init vfs
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 	test-libc_vfs
 }
 

repos/libports/run/libc_vfs_ram.run

@@ -60,7 +60,7 @@ install_config $config
 
 build_boot_image {
 	core init
-	ld.lib.so libc.lib.so
+	ld.lib.so libc.lib.so libm.lib.so
 	test-libc_vfs
 }
 

repos/libports/run/lwip.run

@@ -120,7 +120,7 @@ install_config $config
 # generic modules
 set boot_modules {
 	core init timer
-	ld.lib.so libc.lib.so lwip.lib.so test-lwip_httpsrv
+	ld.lib.so libc.lib.so libm.lib.so lwip.lib.so test-lwip_httpsrv
 }
 
 # platform-specific modules

repos/libports/run/nic_router.run

@@ -369,7 +369,7 @@ install_config $config
 # generic modules
 set boot_modules {
 
-	core init timer nic_router nic_bridge ld.lib.so libc.lib.so
+	core init timer nic_router nic_bridge ld.lib.so libc.lib.so libm.lib.so
 	libc_resolv.lib.so lwip.lib.so lxip.lib.so test-http_clnt
 	test-lwip_httpsrv_static test-lxip_udp_echo test-lxip_udp_client
 }

repos/libports/run/pthread.run

@@ -32,7 +32,7 @@ install_config {
 
 build_boot_image {
 	core init test-pthread
-	ld.lib.so libc.lib.so pthread.lib.so
+	ld.lib.so libc.lib.so libm.lib.so pthread.lib.so
 }
 
 append qemu_args " -nographic -m 128 "

repos/libports/run/smartcard.run

@@ -109,7 +109,7 @@ install_config $config
 set boot_modules {
 	core init timer usb_drv test-smartcard
 	ld.lib.so pcsc-lite.lib.so ccid.lib.so libusb.lib.so
-	libc.lib.so libc_pipe.lib.so pthread.lib.so
+	libc.lib.so libm.lib.so libc_pipe.lib.so pthread.lib.so
 	Info.plist
 }
 

repos/libports/src/app/acpica/os.cc

@@ -11,7 +11,7 @@
  */
 
 #include <base/allocator_avl.h>
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/log.h>
 #include <base/signal.h>
 #include <base/heap.h>
@@ -303,4 +303,4 @@ ACPI_STATUS AcpiOsInstallInterruptHandler(UINT32 irq, ACPI_OSD_HANDLER handler,
 }
 
 
-void Component::construct(Genode::Env &env) { static Acpica::Main main(env); }
+void Libc::Component::construct(Genode::Env &env) { static Acpica::Main main(env); }

repos/libports/src/app/avplay/target.mk

@@ -3,7 +3,7 @@ include $(REP_DIR)/lib/import/import-av.inc
 TARGET = avplay
 SRC_C  = avplay.c cmdutils.c libc_dummies.c
 LIBS  += avfilter avformat avcodec avutil avresample swscale
-LIBS  += sdl libc libm config_args
+LIBS  += sdl posix config_args
 
 CC_WARN += -Wno-parentheses -Wno-switch -Wno-uninitialized \
            -Wno-format-zero-length -Wno-pointer-sign

repos/libports/src/app/eglgears/target.mk

@@ -1,3 +1,3 @@
 TARGET = eglgears
 SRC_C  = eglgears.c
-LIBS   = libc libm gallium
+LIBS   = posix gallium

repos/libports/src/app/mupdf/target.mk

@@ -2,7 +2,7 @@ MUPDF_DIR := $(call select_from_ports,mupdf)/src/lib/mupdf
 TARGET    := mupdf
 SRC_C     := pdfapp.c
 SRC_CC    := main.cc
-LIBS      := libc mupdf
+LIBS      := posix mupdf
 INC_DIR   += $(MUPDF_DIR)/apps
 
 vpath pdfapp.c $(MUPDF_DIR)/apps

repos/libports/src/app/qt5/examples/calculatorform/target.mk

@@ -15,3 +15,5 @@ vpath % $(QMAKE_PROJECT_PATH)
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
+
+LIBS += posix

repos/libports/src/app/qt5/examples/openglwindow/target.mk

@@ -15,3 +15,5 @@ vpath % $(QMAKE_PROJECT_PATH)
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
+
+LIBS += posix

repos/libports/src/app/qt5/examples/previewer/target.mk

@@ -15,3 +15,5 @@ vpath % $(QMAKE_PROJECT_PATH)
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
+
+LIBS += posix

repos/libports/src/app/qt5/examples/samegame/target.mk

@@ -36,3 +36,5 @@ $(addprefix $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)/, $(SAMEGAME3_RESOURCES)): $(
 
 $(addprefix $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)/shared/pics/, $(SAMEGAME_RESOURCES)): $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)/shared/pics
 	$(VERBOSE)ln -sf $(QT5_CONTRIB_DIR)/qtdeclarative/examples/quick/tutorials/samegame/shared/pics/$(notdir $@) $@
+
+LIBS += posix

repos/libports/src/app/qt5/examples/tetrix/target.mk

@@ -17,3 +17,5 @@ include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 CC_CXX_OPT += -DQT_NO_SCRIPTTOOLS
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
+
+LIBS += posix

repos/libports/src/app/qt5/examples/textedit/target.mk

@@ -16,3 +16,4 @@ include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
 
+LIBS += posix

repos/libports/src/app/qt5/qt_avplay/main.cpp

@@ -18,8 +18,7 @@
 #include "main_window.h"
 
 /* Genode includes */
-#include <base/component.h>
-#include <base/printf.h>
+#include <libc/component.h>
 
 
 static inline void load_stylesheet()
@@ -38,7 +37,7 @@ static inline void load_stylesheet()
 extern int genode_argc;
 extern char **genode_argv;
 
-void Component::construct(Genode::Env &env)
+void Libc::Component::construct(Genode::Env &env)
 {
 	QApplication app(genode_argc, genode_argv);
 

repos/libports/src/app/qt5/qt_avplay/target.mk

@@ -27,3 +27,4 @@ $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)/player_stop.png: $(BUILD_BASE_DIR)/bin/qt
 
 $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)/volume.png: $(BUILD_BASE_DIR)/bin/qt5_fs/$(TARGET)
 	$(VERBOSE)ln -sf $(QT5_CONTRIB_DIR)/qtwebkit/Source/WebKit/efl/DefaultTheme/widget/mediacontrol/mutebutton/unmutebutton.png $@
+

repos/libports/src/app/qt5/qt_launchpad/main.cpp

@@ -12,7 +12,7 @@
 #include <QApplication>
 
 /* Genode includes */
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/env.h>
 
 extern int genode_argc;
@@ -56,7 +56,8 @@ struct Qt_launchpad_namespace::Local_env : Genode::Env
 	void close(Parent::Client::Id id) { return genode_env.close(id); }
 };
 
-void Component::construct(Genode::Env &env)
+
+void Libc::Component::construct(Genode::Env &env)
 {
 	static Qt_launchpad_namespace::Local_env local_env(env);
 

repos/libports/src/app/qt5/qt_quicktest/target.mk

@@ -6,3 +6,4 @@ include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_defaults.inc
 
 include $(QT5_REP_DIR)/src/app/qt5/tmpl/target_final.inc
 
+LIBS += posix

repos/libports/src/lib/libc/task.cc

@@ -19,6 +19,9 @@
 #include <base/rpc_client.h>
 #include <base/heap.h>
 
+/* libc includes */
+#include <libc/component.h>
+
 /* libc-internal includes */
 #include <internal/call_func.h>
 #include <base/internal/unmanaged_singleton.h>
@@ -41,12 +44,7 @@
 	} while (0)
 
 
-namespace Libc {
-	class Task;
-
-	void (*original_call_component_construct)(Genode::Env &);
-	void call_component_construct(Genode::Env &env);
-}
+namespace Libc { class Task; }
 
 
 struct Task_resume
@@ -56,9 +54,6 @@ struct Task_resume
 };
 
 
-Genode::size_t Component::stack_size() {
-	return 32UL * 1024 * sizeof(Genode::addr_t); }
-
 /**
  * Libc task
  *
@@ -165,7 +160,7 @@ class Libc::Task : public Genode::Rpc_object<Task_resume, Libc::Task>
 
 void Libc::Task::_app_entry(Task *task)
 {
-	original_call_component_construct(task->_env);
+	Libc::Component::construct(task->_env);
 
 	/* returned from task - switch stack to libc and return to dispatch loop */
 	_longjmp(task->_libc_task, 1);
@@ -190,31 +185,37 @@ namespace Libc {
 
 	void schedule_suspend(void (*suspended) ())
 	{
+		if (!task) {
+			error("libc task handling not initialized, needed for suspend");
+			return;
+		}
 		task->schedule_suspend(suspended);
 	}
 }
 
 
-/****************************
- ** Component-startup hook **
- ****************************/
+/***************************
+ ** Component entry point **
+ ***************************/
 
-/* XXX needs base-internal header? */
-namespace Genode { extern void (*call_component_construct)(Genode::Env &); }
+Genode::size_t Component::stack_size() { return Libc::Component::stack_size(); }
 
-void Libc::call_component_construct(Genode::Env &env)
+
+void Component::construct(Genode::Env &env)
 {
 	/* pass Genode::Env to libc subsystems that depend on it */
-	init_dl(env);
+	Libc::init_dl(env);
 
 	task = unmanaged_singleton<Libc::Task>(env);
 	task->run();
 }
 
 
-static void __attribute__((constructor)) libc_task_constructor(void)
-{
-	/* hook into component startup */
-	Libc::original_call_component_construct = Genode::call_component_construct;
-	Genode::call_component_construct        = &Libc::call_component_construct;
-}
+/**
+ * Default stack size for libc-using components
+ */
+Genode::size_t Libc::Component::stack_size() __attribute__((weak));
+Genode::size_t Libc::Component::stack_size() {
+	return 32UL * 1024 * sizeof(Genode::addr_t); }
+
+

repos/libports/src/lib/posix/construct.cc

@@ -0,0 +1,32 @@
+/*
+ * \brief  Entry point for POSIX applications
+ * \author Norman Feske
+ * \date   2016-12-23
+ */
+
+/*
+ * Copyright (C) 2016 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+/* Genode includes */
+#include <libc/component.h>
+
+/* libc includes */
+#include <stdlib.h> /* for 'exit' */
+
+extern char **genode_argv;
+extern int    genode_argc;
+extern char **genode_envp;
+
+
+/* provided by the application */
+extern "C" int main(int argc, char ** argv, char **envp);
+
+
+void Libc::Component::construct(Genode::Env &env)
+{
+	exit(main(genode_argc, genode_argv, genode_envp));
+}

repos/libports/src/lib/qt5/qt_main.cc

@@ -13,19 +13,8 @@
 
 #ifdef QT_MAIN_STACK_SIZE
 
-#include <base/thread.h>
+#include <libc/component.h>
 
-using namespace Genode;
-
-extern int qt_main(int argc, char *argv[]);
-
-#define qt_main main
-
-int main(int argc, char *argv[])
-{
-	Genode::Thread::myself()->stack_size(QT_MAIN_STACK_SIZE);
-	
-	return qt_main(argc, argv);
-}
+Genode::size_t Libc::Component::stack_size() { return QT_MAIN_STACK_SIZE; }
 
 #endif /* QT_MAIN_STACK_SIZE */

repos/libports/src/server/fuse_fs/exfat/target.mk

@@ -6,7 +6,7 @@ SRC_C    = $(notdir $(EXFAT_DIR)/fuse/main.c)
 SRC_CC   = fuse_fs_main.cc \
            init.cc
 
-LIBS     = base config server libc libfuse libexfat
+LIBS     = config libc libfuse libexfat
 INC_DIR += $(PRG_DIR)/..
 
 CC_OPT += -Wno-unused-function

repos/libports/src/server/fuse_fs/ext2/target.mk

@@ -9,7 +9,7 @@ SRC_C  = $(filter-out $(FILTER_OUT), $(notdir $(wildcard $(FUSE_EXT2_DIR)/*.c)))
 SRC_CC   = fuse_fs_main.cc \
            init.cc
 
-LIBS     = base config server libc libfuse libext2fs
+LIBS     = config libc libfuse libext2fs
 
 CC_OPT += -DHAVE_CONFIG_H -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
 

repos/libports/src/server/fuse_fs/fuse_fs_main.cc

@@ -17,10 +17,10 @@
 #include <file_system_session/rpc_object.h>
 #include <os/attached_rom_dataspace.h>
 #include <os/config.h>
-#include <os/server.h>
 #include <os/session_policy.h>
 #include <root/component.h>
 #include <util/xml_node.h>
+#include <libc/component.h>
 
 /* libc includes */
 #include <errno.h>
@@ -41,13 +41,13 @@ class File_system::Session_component : public Session_rpc_object
 {
 	private:
 
-		Server::Entrypoint   &_ep;
+		Genode::Entrypoint   &_ep;
 		Allocator            &_md_alloc;
 		Directory            &_root;
 		Node_handle_registry  _handle_registry;
 		bool                  _writeable;
 
-		Signal_rpc_member<Session_component> _process_packet_dispatcher;
+		Signal_handler<Session_component> _process_packet_handler;
 
 
 		/******************************
@@ -115,10 +115,10 @@ class File_system::Session_component : public Session_rpc_object
 		}
 
 		/**
-		 * Called by signal dispatcher, executed in the context of the main
+		 * Called by signal handler, executed in the context of the main
 		 * thread (not serialized with the RPC functions)
 		 */
-		void _process_packets(unsigned)
+		void _process_packets()
 		{
 			while (tx_sink()->packet_avail()) {
 
@@ -158,7 +158,7 @@ class File_system::Session_component : public Session_rpc_object
 		 * Constructor
 		 */
 		Session_component(size_t              tx_buf_size,
-		                  Server::Entrypoint &ep,
+		                  Genode::Entrypoint &ep,
 		                  char const         *root_dir,
 		                  bool                writeable,
 		                  Allocator          &md_alloc)
@@ -168,10 +168,10 @@ class File_system::Session_component : public Session_rpc_object
 			_md_alloc(md_alloc),
 			_root(*new (&_md_alloc) Directory(_md_alloc, root_dir, false)),
 			_writeable(writeable),
-			_process_packet_dispatcher(_ep, *this, &Session_component::_process_packets)
+			_process_packet_handler(_ep, *this, &Session_component::_process_packets)
 		{
-			_tx.sigh_packet_avail(_process_packet_dispatcher);
-			_tx.sigh_ready_to_ack(_process_packet_dispatcher);
+			_tx.sigh_packet_avail(_process_packet_handler);
+			_tx.sigh_ready_to_ack(_process_packet_handler);
 		}
 
 		/**
@@ -408,7 +408,7 @@ class File_system::Root : public Root_component<Session_component>
 {
 	private:
 
-		Server::Entrypoint &_ep;
+		Genode::Entrypoint &_ep;
 
 	protected:
 
@@ -501,7 +501,7 @@ class File_system::Root : public Root_component<Session_component>
 		 *                    data-flow signals of packet streams
 		 * \param md_alloc    meta-data allocator
 		 */
-		Root(Server::Entrypoint &ep, Allocator &md_alloc)
+		Root(Genode::Entrypoint &ep, Allocator &md_alloc)
 		:
 			Root_component<Session_component>(&ep.rpc_ep(), &md_alloc),
 			_ep(ep)
@@ -511,7 +511,7 @@ class File_system::Root : public Root_component<Session_component>
 
 struct File_system::Main
 {
-	Server::Entrypoint &ep;
+	Genode::Entrypoint &ep;
 
 	/*
 	 * Initialize root interface
@@ -520,7 +520,7 @@ struct File_system::Main
 
 	Root fs_root = { ep, sliced_heap };
 
-	Main(Server::Entrypoint &ep) : ep(ep)
+	Main(Genode::Entrypoint &ep) : ep(ep)
 	{
 		if (!Fuse::init_fs()) {
 			Genode::error("FUSE fs initialization failed");
@@ -539,10 +539,12 @@ struct File_system::Main
 };
 
 
-/**********************
- ** Server framework **
- **********************/
+/***************
+ ** Component **
+ ***************/
+
+void Libc::Component::construct(Genode::Env &env)
+{
+	static File_system::Main inst(env.ep());
+}
 
-char const *   Server::name()                            { return "fuse_fs_ep"; }
-Genode::size_t Server::stack_size()                      { return 16*1024*sizeof(long); }
-void           Server::construct(Server::Entrypoint &ep) { static File_system::Main inst(ep); }

repos/libports/src/server/fuse_fs/ntfs-3g/target.mk

@@ -6,7 +6,7 @@ SRC_C   := ntfs-3g.c ntfs-3g_common.c
 SRC_CC  := fuse_fs_main.cc \
            init.cc
 
-LIBS    := base config server libc libfuse libntfs-3g
+LIBS    := config libc libfuse libntfs-3g
 
 CC_OPT  := -DHAVE_TIMESPEC -DHAVE_CONFIG_H -DRECORD_LOCKING_NOT_IMPLEMENTED
 

repos/libports/src/test/expat/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-expat
 SRC_CC   = main.cc
-LIBS     = expat libc
+LIBS     = expat posix

repos/libports/src/test/ldso/main.cc

@@ -15,7 +15,7 @@
 #include <rom_session/connection.h>
 #include <base/env.h>
 #include <base/heap.h>
-#include <base/component.h>
+#include <libc/component.h>
 #include <base/shared_object.h>
 
 using namespace Genode;
@@ -185,7 +185,7 @@ static void test_shared_object_api(Env &env, Allocator &alloc)
 /**
  * Main function of LDSO test
  */
-void Component::construct(Genode::Env &env)
+void Libc::Component::construct(Genode::Env &env)
 {
 	static Heap heap(env.ram(), env.rm());
 

repos/libports/src/test/libc/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-libc
 SRC_CC   = main.cc
-LIBS     = libm libc
+LIBS     = posix

repos/libports/src/test/libc_block/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-libc_block
-LIBS   = libc
+LIBS   = posix
 SRC_CC = main.cc

repos/libports/src/test/libc_ffat/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-libc_ffat
-LIBS   = libc libc_ffat
+LIBS   = posix libc_ffat
 SRC_CC = main.cc

repos/libports/src/test/libc_pipe/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-libc_pipe
-LIBS   = libc libc_pipe pthread
+LIBS   = posix libc_pipe pthread
 SRC_CC = main.cc

repos/libports/src/test/libc_resolv/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-libc_resolv
 SRC_CC   = main.cc
-LIBS     = libc libc_resolv
+LIBS     = posix libc_resolv

repos/libports/src/test/libc_vfs/target.mk

@@ -1,5 +1,5 @@
 TARGET = test-libc_vfs
-LIBS   = libc
+LIBS   = posix
 SRC_CC = main.cc
 
 # we re-use the libc_ffat test

repos/libports/src/test/libports/main.cc

@@ -11,4 +11,6 @@
  * under the terms of the GNU General Public License version 2.
  */
 
-int main() { }
+#include <libc/component.h>
+
+void Libc::Component::construct(Genode::Env &) { }

repos/libports/src/test/lwip/http_clnt/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-http_clnt
-LIBS     = lwip libc
+LIBS     = lwip posix
 SRC_CC   = main.cc
 
 INC_DIR += $(REP_DIR)/src/lib/lwip/include

repos/libports/src/test/lwip/http_srv/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-lwip_httpsrv
-LIBS     = lwip libc
+LIBS     = lwip posix
 SRC_CC   = main.cc
 
 INC_DIR += $(REP_DIR)/src/lib/lwip/include

repos/libports/src/test/lwip/http_srv_static/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-lwip_httpsrv_static
-LIBS     = lwip libc config
+LIBS     = lwip posix config
 SRC_CC   = main.cc
 
 INC_DIR += $(REP_DIR)/src/lib/lwip/include

repos/libports/src/test/lwip/loopback/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-lwip_loop
-LIBS   = lwip libc libc_lwip_loopback
+LIBS   = lwip posix libc_lwip_loopback
 SRC_CC = main.cc

repos/libports/src/test/lwip/pingpong/client/libc_lwip/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-ping_client_libc_lwip
-LIBS     = base libc lwip libc_lwip_nic_dhcp config_args
+LIBS     = posix lwip libc_lwip_nic_dhcp config_args
 SRC_CC   = main.cc pingpong.cc
 
 vpath main.cc     $(PRG_DIR)/..

repos/libports/src/test/lwip/pingpong/client/lwip/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-ping_client_lwip
-LIBS     = base libc lwip config_args
+LIBS     = posix lwip config_args
 SRC_CC   = main.cc pingpong.cc
 
 INC_DIR += $(REP_DIR)/src/lib/lwip/include

repos/libports/src/test/lwip/pingpong/server/libc_lwip/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-ping_server_libc_lwip
-LIBS     = base libc libc_lwip_nic_dhcp libc_lwip lwip config_args
+LIBS     = posix libc_lwip_nic_dhcp libc_lwip lwip config_args
 SRC_CC   = main.cc pingpong.cc
 
 vpath main.cc     $(PRG_DIR)/..

repos/libports/src/test/lwip/pingpong/server/lwip/target.mk

@@ -1,5 +1,5 @@
 TARGET   = test-ping_server_lwip
-LIBS     = base libc lwip config_args
+LIBS     = posix lwip config_args
 SRC_CC   = main.cc pingpong.cc
 
 CC_OPT += -DLWIP_NATIVE

repos/libports/src/test/moon/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-moon
-LIBS   = luacxx libc libm
+LIBS   = luacxx posix
 SRC_CC = main.cc

repos/libports/src/test/pthread/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-pthread
 SRC_CC   = main.cc
-LIBS     = libc pthread
+LIBS     = posix pthread

repos/libports/src/test/python/target.mk

@@ -1,4 +1,4 @@
 TARGET   = test-python
-LIBS     = python libc libm
+LIBS     = python posix
 REQUIRES = x86
 SRC_CC   = main.cc

repos/libports/src/test/qt5/qpluginwidget/target.mk

@@ -15,3 +15,5 @@ test-plugin.tar: config.plugin
 
 clean:
 	$(VERBOSE)rm test-plugin.tar
+
+LIBS += posix

repos/libports/src/test/rust/target.mk

@@ -1,4 +1,5 @@
 TARGET = test-rust
 SRC_RS = main.rs
 SRC_CC = printf.cc
-LIBS = libcore-rust libcollections-rust base librustc_unicode-rust liballoc-rust liblibc-rust liballoc_system-rust
+LIBS   = libcore-rust libcollections-rust base librustc_unicode-rust \
+         liballoc-rust liblibc-rust liballoc_system-rust posix

repos/libports/src/test/sdl/target.mk

@@ -1,3 +1,3 @@
 TARGET   = test-sdl
-LIBS     = sdl libc
+LIBS     = sdl posix
 SRC_CC   = main.cc

repos/libports/src/test/smartcard/target.mk

@@ -1,5 +1,5 @@
 TARGET = test-smartcard
-LIBS   = pcsc-lite libc
+LIBS   = pcsc-lite posix
 SRC_CC = main.cc
 
 vpath main.cc $(PRG_DIR)/..

repos/libports/src/test/stdcxx/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-stdcxx
 SRC_CC = main.cc
-LIBS   = base stdcxx
+LIBS   = posix stdcxx

repos/os/src/test/blk/bench/main.cc

@@ -2,6 +2,7 @@
 #include <block_session/connection.h>
 #include <os/server.h>
 #include <timer_session/connection.h>
+#include <libc/component.h>
 
 #include <stdio.h>
 
@@ -153,13 +154,7 @@ struct Test::Main
 };
 
 
-namespace Server {
-
-	char const *name()          { return "block_bench_ep"; };
-	Genode::size_t stack_size() { return 16*1024*sizeof(long); }
-
-	void construct(Entrypoint &ep)
-	{
-		static Test::Main server(ep);
-	}
+void Libc::Component::construct(Genode::Env &env)
+{
+	static Test::Main server(env.ep());
 }

repos/os/src/test/blk/bench/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-blk-bench
 SRC_CC = main.cc
-LIBS   = base server libc
+LIBS   = base libc

repos/ports/mk/gnu_build.mk

@@ -30,7 +30,7 @@
 TARGET ?= $(lastword $(subst /, ,$(PRG_DIR)))
 PKG    ?= $(TARGET)
 
-LIBS += libc libm
+LIBS += posix
 
 PWD = $(shell pwd)
 
@@ -107,18 +107,9 @@ CXXFLAGS += $(COMMON_CFLAGS_CXXFLAGS)
 # Unfortunately, the use of '--start-group' and '--end-group' does not suffice
 # in all cases because 'libtool' strips those arguments from the 'LIBS' variable.
 #
-# Furthermore, 'libtool' reorders library names on the command line in a way that
-# shared libraries appear before static libraries. This has the unfortunate effect
-# that the program's entry symbol 'Genode::component_entry_point' in the static
-# library 'component_entry_point.lib.a' is not found anymore. Passing the static
-# library names as linker arguments (-Wl,...) works around this problem, because
-# 'libtool' keeps command line arguments before the shared library names.
-#
-
 LDLIBS_A  = $(filter %.a, $(sort $(LINK_ITEMS)) $(EXT_OBJECTS) $(LIBGCC))
 LDLIBS_SO = $(filter %.so,$(sort $(LINK_ITEMS)) $(EXT_OBJECTS) $(LIBGCC))
-comma := ,
-LDLIBS += $(addprefix -Wl$(comma),$(LDLIBS_A)) $(LDLIBS_SO) $(LDLIBS_A)
+LDLIBS   += $(LDLIBS_A) $(LDLIBS_SO) $(LDLIBS_A)
 
 #
 # Re-configure the Makefile if the Genode build environment changes

repos/ports/src/app/arora/target.mk

@@ -84,3 +84,5 @@ vpath % $(ARORA_PORT_DIR)/src/app/arora/src/useragent
 vpath % $(ARORA_PORT_DIR)/src/app/arora/src/utils
 
 -include $(QT_TMPL_DIR)/target_final.inc
+
+LIBS += posix

repos/ports/src/app/dosbox/target.mk

@@ -53,5 +53,5 @@ CC_WARN += -Wno-unused-variable -Wno-unused-function -Wno-switch -Wno-unused-val
            -Wno-sign-compare -Wno-narrowing -Wno-missing-braces -Wno-array-bounds \
            -Wno-parentheses
 
-LIBS += libc libm libpng sdl sdl_net stdcxx zlib
+LIBS += posix libpng sdl sdl_net stdcxx zlib
 LIBS += libc_lwip_nic_dhcp config_args

repos/ports/src/app/gdb_monitor/main.cc

@@ -11,7 +11,7 @@
  * under the terms of the GNU General Public License version 2.
  */
 
-#include <base/component.h>
+#include <libc/component.h>
 
 /*
  * Suppress messages of libc dummy functions
@@ -33,7 +33,7 @@ extern "C" int gdbserver_main(int argc, const char *argv[]);
 
 extern Genode::Env *genode_env;
 
-void Component::construct(Genode::Env &env)
+void Libc::Component::construct(Genode::Env &env)
 {
 	genode_env = &env;