6 files changed, 59 insertions, 18 deletions
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 4222912fc..8a4add813 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -49,6 +49,11 @@ CSRC := $(filter-out waitpid.c, $(CSRC))
 endif
 endif
 
+ifneq ($(ARCH_USE_MMU),y)
+# stubbed out in mman.h
+CSRC := $(filter-out msync.c, $(CSRC))
+endif
+
 ifneq ($(UCLIBC_BSD_SPECIFIC),y)
 # we need these internally: getdomainname.c
 CSRC := $(filter-out mincore.c setdomainname.c,$(CSRC))
diff --git a/libc/sysdeps/linux/common/__rt_sigtimedwait.c b/libc/sysdeps/linux/common/__rt_sigtimedwait.c
index 79b94adef..a7ab8fb61 100644
--- a/libc/sysdeps/linux/common/__rt_sigtimedwait.c
+++ b/libc/sysdeps/linux/common/__rt_sigtimedwait.c
@@ -12,11 +12,7 @@
 #include <signal.h>
 #include <string.h>
 
-libc_hidden_proto(memcpy)
-
 #ifdef __NR_rt_sigtimedwait
-#include <string.h>
-libc_hidden_proto(memcpy)
 
 # ifdef __UCLIBC_HAS_THREADS_NATIVE__
 #  include <sysdep-cancel.h>
diff --git a/libc/sysdeps/linux/common/__rt_sigwaitinfo.c b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c
index c8953bfbc..92a11c9b6 100644
--- a/libc/sysdeps/linux/common/__rt_sigwaitinfo.c
+++ b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c
@@ -12,12 +12,8 @@
 #include <signal.h>
 #include <string.h>
 
-libc_hidden_proto(memcpy)
-
 #ifdef __NR_rt_sigtimedwait
 
-#include <string.h>
-
 # ifdef __UCLIBC_HAS_THREADS_NATIVE__
 #  include <sysdep-cancel.h>
 
diff --git a/libc/sysdeps/linux/common/bits/mathcalls.h b/libc/sysdeps/linux/common/bits/mathcalls.h
index 3772b7d0d..1e92b527e 100644
--- a/libc/sysdeps/linux/common/bits/mathcalls.h
+++ b/libc/sysdeps/linux/common/bits/mathcalls.h
@@ -48,11 +48,16 @@
 #endif
 
 
-/* __MATHCALLX and __MATHCALLI include libm_hidden_def
+/* __MATHCALLX(type,function,[suffix],args,attrib) and
+ * __MATHCALLI(type,function,[suffix],args) include libm_hidden_def
  * (for "double" versions only, xxxf and xxxl do not get this treatment).
- * __MATHCALL does not.
- * __MATHDECL_PRIV includes libm_hidden_def (always)
- * and declares __foo, not foo.
+ *
+ * __MATHDECL(type,function,[suffix],args) does not.
+ * __MATHCALL(function,[suffix],args) also does not
+ * (it is just a shortcut to __MATHDECL(_Mdouble_,function,[suffix],args)).
+ *
+ * __MATHDECL_PRIV(type,function,[suffix],args,attrib)
+ * includes libm_hidden_def (always) and declares __foo, not foo.
  */
 
 
diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h
index 2f67a4ebf..4ef22311a 100644
--- a/libc/sysdeps/linux/common/bits/sigset.h
+++ b/libc/sysdeps/linux/common/bits/sigset.h
@@ -53,10 +53,6 @@ typedef struct {
 #if !defined _SIGSET_H_fns && defined _SIGNAL_H
 # define _SIGSET_H_fns 1
 
-# ifndef _EXTERN_INLINE
-#  define _EXTERN_INLINE extern __inline
-# endif
-
 /* Return a mask that includes the bit for SIG only.  */
 /* Unsigned cast ensures shift/mask insns are used.  */
 # define __sigmask(sig) \
@@ -156,20 +152,30 @@ typedef struct {
 /* These functions needn't check for a bogus signal number -- error
    checking is done in the non __ versions.  */
 
+# if !defined __USE_EXTERN_INLINES || defined __PROVIDE_OUT_OF_LINE_SIGSETFN
 extern int __sigismember (__const __sigset_t *, int);
 libc_hidden_proto(__sigismember)
 extern int __sigaddset (__sigset_t *, int);
 libc_hidden_proto(__sigaddset)
 extern int __sigdelset (__sigset_t *, int);
 libc_hidden_proto(__sigdelset)
+# endif
 
 # ifdef __USE_EXTERN_INLINES
+#  undef _EXTERN_INLINE
+#  ifdef __PROVIDE_OUT_OF_LINE_SIGSETFN
+#   define _EXTERN_INLINE
+#  else /* normal case */
+    /* dropped extern below: otherwise every module with __USE_EXTERN_INLINES
+     * will have its own copy of out-of line function emitted. */
+#   define _EXTERN_INLINE /*extern*/ __always_inline
+#  endif
 #  define __SIGSETFN(NAME, BODY, CONST)					\
 _EXTERN_INLINE int							\
 NAME (CONST __sigset_t *__set, int __sig)				\
 {									\
 	unsigned long __mask = __sigmask (__sig);			\
-	unsigned long __word = __sigword (__sig);			\
+	unsigned __word = __sigword (__sig);				\
 	return BODY;							\
 }
 
@@ -180,5 +186,38 @@ __SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
 #  undef __SIGSETFN
 # endif
 
+# ifdef _LIBC
+/* It's far too much PITA to __USE_EXTERN_INLINES from within libc.
+ * Especially since we want to inline only calls with const sig,
+ * but __USE_EXTERN_INLINES will inline all calls!
+ */
+static __always_inline unsigned long
+const_sigismember(const __sigset_t *set, int sig)
+{
+	unsigned long mask = __sigmask(sig);
+	unsigned word = __sigword(sig);
+	return (set->__val[word] & mask);
+}
+#  define __sigismember(set, sig) \
+	(__builtin_constant_p(sig) ? (const_sigismember(set, sig) != 0) : __sigismember(set, sig))
+static __always_inline void
+const_sigaddset(__sigset_t *set, int sig)
+{
+	unsigned long mask = __sigmask(sig);
+	unsigned word = __sigword(sig);
+	set->__val[word] |= mask;
+}
+#  define __sigaddset(set, sig) \
+	(__builtin_constant_p(sig) ? (const_sigaddset(set, sig), 0)  : __sigaddset(set, sig))
+static __always_inline void
+const_sigdelset(__sigset_t *set, int sig)
+{
+	unsigned long mask = __sigmask(sig);
+	unsigned word = __sigword(sig);
+	set->__val[word] &= ~mask;
+}
+#  define __sigdelset(set, sig) \
+	(__builtin_constant_p(sig) ? (const_sigdelset(set, sig), 0) : __sigdelset(set, sig))
+# endif
 
 #endif /* ! _SIGSET_H_fns.  */
diff --git a/libc/sysdeps/linux/common/pause.c b/libc/sysdeps/linux/common/pause.c
index 33eb409c6..ab16fa73c 100644
--- a/libc/sysdeps/linux/common/pause.c
+++ b/libc/sysdeps/linux/common/pause.c
@@ -25,7 +25,7 @@ __libc_pause (void)
 {
   sigset_t set;
 
-  __sigemptyset (&set);
+  /*__sigemptyset (&set); - why? */
   sigprocmask (SIG_BLOCK, NULL, &set);
 
   /* pause is a cancellation point, but so is sigsuspend.