diff --git a/repos/libports/lib/mk/arm/libm.mk b/repos/libports/lib/mk/arm/libm.mk
index bfebe9a60..b0f53ab4c 100644
--- a/repos/libports/lib/mk/arm/libm.mk
+++ b/repos/libports/lib/mk/arm/libm.mk
@@ -17,3 +17,7 @@ FILTER_OUT += s_cosl.c s_frexpl.c s_nextafterl.c s_nexttoward.c \
 FILTER_OUT += s_fmal.c
 
 include $(REP_DIR)/lib/mk/libm.mk
+
+SRC_C  += msun/arm/fenv.c
+
+vpath msun/arm/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/lib/mk/x86_32/libm.mk b/repos/libports/lib/mk/x86_32/libm.mk
new file mode 100644
index 000000000..addb33cf2
--- /dev/null
+++ b/repos/libports/lib/mk/x86_32/libm.mk
@@ -0,0 +1,5 @@
+include $(REP_DIR)/lib/mk/libm.mk
+
+SRC_C += msun/i387/fenv.c
+
+vpath msun/i387/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/lib/mk/x86_64/libm.mk b/repos/libports/lib/mk/x86_64/libm.mk
new file mode 100644
index 000000000..d72d0348e
--- /dev/null
+++ b/repos/libports/lib/mk/x86_64/libm.mk
@@ -0,0 +1,5 @@
+include $(REP_DIR)/lib/mk/libm.mk
+
+SRC_C += msun/amd64/fenv.c
+
+vpath msun/amd64/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/src/lib/libc/dummies.cc b/repos/libports/src/lib/libc/dummies.cc
index e4bd7f17d..954aafd74 100644
--- a/repos/libports/src/lib/libc/dummies.cc
+++ b/repos/libports/src/lib/libc/dummies.cc
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (C) 2008-2013 Genode Labs GmbH
+ * Copyright (C) 2008-2015 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.
@@ -17,131 +17,123 @@
 
 extern "C" {
 
-	typedef long DUMMY;
+#include <sys/file.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/resource.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/ucontext.h>
+#include <sys/wait.h>
 
-#define DUMMY(retval, name) __attribute__((weak))		\
-DUMMY name(void) {						\
-	PDBG( #name " called, not implemented");		\
+#include <db.h>
+#include <netdb.h>
+#include <signal.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <pwd.h>
+
+#define DUMMY(ret_type, ret_val, name, args) __attribute__((weak)) \
+ret_type name args \
+{ \
+	PDBG( #name " not implemented"); \
 	errno = ENOSYS;						\
-	return retval;						\
+	return ret_val; \
 }
 
-DUMMY(-1, access)
-DUMMY(-1, chmod)
-DUMMY(-1, chown)
-DUMMY(-1, chroot)
-DUMMY( 0, crypt)
-DUMMY( 0, dbopen)
-DUMMY(-1, dup)
-DUMMY( 0, __default_hash)
-DUMMY(-1, _dup2)
-DUMMY(-1, dup2)
-DUMMY( 0, endpwent)
-DUMMY( 0, fchmod)
-DUMMY(-1, fchown)
-DUMMY(-1, feholdexcept)
-DUMMY(-1, fegetenv)
-DUMMY(-1, feraiseexcept)
-DUMMY(-1, feupdateenv)
-DUMMY(-1, flock)
-DUMMY(-1, fork)
-DUMMY(-1, _fpathconf)
-DUMMY(-1, fpathconf)
-DUMMY(-1, freebsd7___semctl)
-DUMMY(-1, fstatat)
-DUMMY(-1, getcontext)
-DUMMY( 0, getdtablesize)
-DUMMY( 0, getegid)
-DUMMY( 0, geteuid)
-DUMMY(-1, getfsstat)
-DUMMY( 0, getgid)
-DUMMY(-1, getgroups)
-DUMMY( 0, gethostbyname)
-DUMMY( 0, _getlogin)
-DUMMY(-1, getnameinfo)
-DUMMY(-1, getpid)
-DUMMY( 0, getservbyname)
-DUMMY(-1, getsid)
-DUMMY(-1, getppid)
-DUMMY(-1, getpgrp)
-DUMMY(-1, getpriority)
-DUMMY( 0, getpwent)
-DUMMY( 0, getpwnam)
-DUMMY( 0, getpwuid)
-DUMMY( 0, getpwuid_r)
-DUMMY(-1, __getpty)
-DUMMY(-1, _getpty)
-DUMMY(-1, getrusage)
-DUMMY( 0, getuid)
-DUMMY(-1, __has_sse)
-DUMMY(-1, host_detect_local_cpu)
-DUMMY(-1, kill)
-DUMMY(-1, ksem_close)
-DUMMY(-1, ksem_destroy)
-DUMMY(-1, ksem_getvalue)
-DUMMY(-1, ksem_open)
-DUMMY(-1, ksem_post)
-DUMMY(-1, ksem_timedwait)
-DUMMY(-1, ksem_trywait)
-DUMMY(-1, ksem_unlink)
-DUMMY(-1, ksem_wait)
-DUMMY(-1, link)
-DUMMY(-1, madvise)
-DUMMY(-1, mkfifo)
-DUMMY(-1, mknod)
-DUMMY(-1, mprotect)
-DUMMY( 0, ___mtctxres)
-DUMMY(-1, nanosleep)
-DUMMY(-1, __nsdefaultsrc)
-DUMMY(-1, _nsdispatch)
-DUMMY(-1, _openat)
-DUMMY(-1, pathconf)
-DUMMY(-1, pthread_create)
-DUMMY(-1, regcomp)
-DUMMY(-1, regexec)
-DUMMY(-1, regfree)
-DUMMY(-1, rmdir)
-DUMMY(-1, sbrk)
-DUMMY(-1, sched_setparam)
-DUMMY(-1, sched_setscheduler)
-DUMMY(-1, sched_yield)
-DUMMY(-1, _select)
-DUMMY(-1, __semctl)
-DUMMY(-1, setcontext)
-DUMMY(-1, setegid)
-DUMMY(-1, seteuid)
-DUMMY(-1, setgid)
-DUMMY(-1, setuid)
-DUMMY(-1, setgroups)
-DUMMY(-1, setitimer)
-DUMMY(-1, setpassent)
-DUMMY(-1, setpgid)
-DUMMY(-1, setpriority)
-DUMMY( 0, setpwent)
-DUMMY(-1, setregid)
-DUMMY(-1, setreuid)
-DUMMY(-1, setrlimit)
-DUMMY(-1, setsid)
-DUMMY(-1, _sigaction)
-DUMMY(-1, sigaction)
-DUMMY(-1, sigblock)
-DUMMY(-1, sigpause)
-DUMMY(-1, _sigprocmask)
-DUMMY(-1, sigprocmask)
-DUMMY(-1, _sigsuspend)
-DUMMY(-1, sigsuspend)
-DUMMY(-1, socketpair)
-DUMMY(-1, stat)
-DUMMY(-1, statfs)
-DUMMY( 0, sync)
-DUMMY(-1, __test_sse)
-DUMMY(-1, truncate)
-DUMMY( 0, umask)
-DUMMY(-1, _umtx_op)
-DUMMY( 0, utimes)
-DUMMY(-1, utrace)
-DUMMY(-1, vfork)
-DUMMY(-1, _wait4)
+DUMMY(int   , -1, access, (const char *, int))
+DUMMY(int   , -1, chmod, (const char *, mode_t))
+DUMMY(int   , -1, chown, (const char *, uid_t, gid_t))
+DUMMY(int   , -1, chroot, (const char *))
+DUMMY(char *,  0, crypt, (const char *, const char *))
+DUMMY(DB *  ,  0, dbopen, (const char *, int, int, DBTYPE, const void *))
+DUMMY(int   , -1, dup, (int))
+DUMMY(u_int32_t, 0, __default_hash, (const void *, size_t));
+DUMMY(int   , -1, dup2, (int, int))
+DUMMY(void  ,   , endpwent, (void))
+DUMMY(int   ,  0, fchmod, (int, mode_t))
+DUMMY(int   , -1, fchown, (int, uid_t, gid_t))
+DUMMY(int   , -1, flock, (int, int))
+DUMMY(pid_t , -1, fork, (void))
+DUMMY(long  , -1, _fpathconf, (int, int))
+DUMMY(long  , -1, fpathconf, (int, int))
+DUMMY(int   , -1, freebsd7___semctl, (void))
+DUMMY(int   , -1, fstatat, (int, const char *, struct stat *, int))
+DUMMY(int   , -1, getcontext, (ucontext_t *))
+DUMMY(int   ,  0, getdtablesize, (void))
+DUMMY(gid_t ,  0, getegid, (void))
+DUMMY(uid_t ,  0, geteuid, (void))
+DUMMY(int   , -1, getfsstat, (struct statfs *, long, int))
+DUMMY(gid_t ,  0, getgid, (void))
+DUMMY(int   , -1, getgroups, (int, gid_t *))
+DUMMY(struct hostent *, 0, gethostbyname, (const char *))
+DUMMY(char *,  0, _getlogin, (void))
+DUMMY(int   , -1, getnameinfo, (const sockaddr *, socklen_t, char *, size_t, char *, size_t, int))
+DUMMY(pid_t , -1, getpid, (void))
+DUMMY(struct servent *, 0, getservbyname, (const char *, const char *))
+DUMMY(int   , -1, getsid, (pid_t))
+DUMMY(pid_t , -1, getppid, (void))
+DUMMY(pid_t , -1, getpgrp, (void))
+DUMMY(int   , -1, getpriority, (int, int))
+DUMMY(struct passwd *, 0, getpwent, (void))
+DUMMY(struct passwd *, 0, getpwnam, (const char *))
+DUMMY(struct passwd *, 0, getpwuid, (uid_t))
+DUMMY(int   ,  0, getpwuid_r, (uid_t, struct passwd *, char *, size_t, struct passwd **))
+DUMMY(int   , -1, getrusage, (int, rusage *))
+DUMMY(uid_t ,  0, getuid, (void))
+DUMMY(int   , -1, kill, (pid_t, int))
+DUMMY(int   , -1, link, (const char *, const char *))
+DUMMY(int   , -1, mkfifo, (const char *, mode_t))
+DUMMY(int   , -1, mknod, (const char *, mode_t, dev_t))
+DUMMY(int   , -1, mprotect, (const void *, size_t, int))
+DUMMY(void *,  0, ___mtctxres, (void))
+DUMMY(int   , -1, nanosleep, (const timespec *, timespec *))
+DUMMY(void *,  0, __nsdefaultsrc, (void))
+DUMMY(int   , -1, _nsdispatch, (void))
+DUMMY(long  , -1, pathconf, (const char *, int))
+DUMMY(int   , -1, pthread_create, (pthread_t *, const pthread_attr_t *, void *(*)(void *), void *))
+DUMMY(int   , -1, rmdir, (const char *))
+DUMMY(void *,  0, sbrk, (intptr_t))
+DUMMY(int   , -1, sched_setparam, (pid_t, const sched_param *))
+DUMMY(int   , -1, sched_setscheduler, (pid_t, int, const sched_param *))
+DUMMY(int   , -1, sched_yield, (void))
+DUMMY(int   , -1, _select, (void))
+DUMMY(int   , -1, __semctl, (void))
+DUMMY(int   , -1, setcontext, (const ucontext_t *))
+DUMMY(int   , -1, setegid, (uid_t))
+DUMMY(int   , -1, seteuid, (uid_t))
+DUMMY(int   , -1, setgid, (gid_t))
+DUMMY(int   , -1, setuid, (uid_t))
+DUMMY(int   , -1, setgroups, (int, const gid_t *))
+DUMMY(int   , -1, setitimer, (int, const itimerval *, itimerval *))
+DUMMY(int   , -1, setpassent, (int))
+DUMMY(int   , -1, setpgid, (pid_t, pid_t))
+DUMMY(int   , -1, setpriority, (int, int, int))
+DUMMY(void  ,   , setpwent, (void))
+DUMMY(int   , -1, setregid, (gid_t, gid_t))
+DUMMY(int   , -1, setreuid, (uid_t, uid_t))
+DUMMY(int   , -1, setrlimit, (int, const rlimit *))
+DUMMY(pid_t , -1, setsid, (void))
+DUMMY(int   , -1, _sigaction, (int, const struct sigaction *, struct sigaction *))
+DUMMY(int   , -1, sigaction, (int, const struct sigaction *, struct sigaction *))
+DUMMY(int   , -1, sigblock, (int))
+DUMMY(int   , -1, sigpause, (int))
+DUMMY(int   , -1, _sigprocmask, (int, const sigset_t *, sigset_t *))
+DUMMY(int   , -1, sigprocmask, (int, const sigset_t *, sigset_t *))
+DUMMY(int   , -1, _sigsuspend, (const sigset_t *))
+DUMMY(int   , -1, sigsuspend, (const sigset_t *))
+DUMMY(int   , -1, socketpair, (int, int, int, int *))
+DUMMY(int   , -1, stat, (const char *, struct stat *))
+DUMMY(int   , -1, statfs, (const char *, struct statfs *))
+DUMMY(void  ,   , sync, (void))
+DUMMY(int   , -1, truncate, (const char *, off_t))
+DUMMY(mode_t,  0, umask, (mode_t))
+DUMMY(int   ,  0, utimes, (const char *, const timeval *))
+DUMMY(pid_t , -1, vfork, (void))
+DUMMY(pid_t , -1, _wait4, (pid_t, int *, int, struct rusage *))
+
 
 void ksem_init(void)
 {
@@ -149,5 +141,17 @@ void ksem_init(void)
 	while (1);
 }
 
+
+int __attribute__((weak)) madvise(void *addr, size_t length, int advice)
+{
+	if (advice == MADV_DONTNEED)
+		/* ignore hint */
+		return 0;
+
+	PDBG("called, not implemented - %p+%zx advice=%d", addr, length, advice);
+	errno = ENOSYS;
+	return -1;
+}
+
 } /* extern "C" */
 
diff --git a/repos/ports/ports/gcc.hash b/repos/ports/ports/gcc.hash
index 21f0bc6af..f43317107 100644
--- a/repos/ports/ports/gcc.hash
+++ b/repos/ports/ports/gcc.hash
@@ -1 +1 @@
-f5f038bc4232d78154248b6ce85b94108ca55255
+920639d7e58d1b0a2a04f727f77b9a6f48806bfc
diff --git a/repos/ports/ports/gcc.port b/repos/ports/ports/gcc.port
index 183badc18..8d105ddbb 100644
--- a/repos/ports/ports/gcc.port
+++ b/repos/ports/ports/gcc.port
@@ -11,7 +11,8 @@ DIR(gcc)  := src/noux-pkg/gcc
 GENODE_DIR  := $(REP_DIR)/../..
 PATCHES_DIR := $(GENODE_DIR)/tool/patches/gcc-$(VERSION)
 PATCHES     := $(addprefix $(PATCHES_DIR)/,$(shell cat $(PATCHES_DIR)/series)) \
-               $(REP_DIR)/src/noux-pkg/gcc/build.patch
+               $(REP_DIR)/src/noux-pkg/gcc/build.patch \
+               $(REP_DIR)/src/noux-pkg/gcc/arm.patch
 PATCH_OPT   := -p1 -d ${DIR(gcc)}
 
 AUTOCONF := autoconf2.64
diff --git a/repos/ports/src/noux-pkg/gcc/arm.patch b/repos/ports/src/noux-pkg/gcc/arm.patch
new file mode 100644
index 000000000..729f9eff6
--- /dev/null
+++ b/repos/ports/src/noux-pkg/gcc/arm.patch
@@ -0,0 +1,12 @@
++++ b/gcc/config/arm/arm.h
+@@ -2193,9 +2193,7 @@
+ /* -mcpu=native handling only makes sense with compiler running on
+    an ARM chip.  */
+ #if defined(__arm__)
+-extern const char *host_detect_local_cpu (int argc, const char **argv);
+-# define EXTRA_SPEC_FUNCTIONS						\
+-  { "local_cpu_detect", host_detect_local_cpu },
++# define EXTRA_SPEC_FUNCTIONS
+ 
+ # define MCPU_MTUNE_NATIVE_SPECS					\
+    " %{march=native:%<march=native %:local_cpu_detect(arch)}"		\