Patch from David McCullough <davidm@lineo.com>:

* reduce the sigset types to 32 bits (I've mentioned this before)
  I think I saw this change go in for another platform anyway ;-)

* Do not use _IO_FILE as it clashes with the C++ libraries which know
  too much about how glibc workds :-(

* Do not use _G_va_list for the same reason.

* remove the CTORS/DTORS from crt0.S for ARM as the compiler provided
  crtbegin.o and crtend.o have these (and only these) already in them and
  you get multiple defined errs :-(

2 files changed, 12 insertions, 66 deletions

diff --git a/libc/sysdeps/linux/arm/bits/sigset.h b/libc/sysdeps/linux/arm/bits/sigset.h
index 7ccadda45..6a516cd29 100644
--- a/libc/sysdeps/linux/arm/bits/sigset.h
+++ b/libc/sysdeps/linux/arm/bits/sigset.h
@@ -24,11 +24,7 @@ typedef int __sig_atomic_t;
 
 /* A `sigset_t' has a bit for each signal.  */
 
-# define _SIGSET_NWORDS	(1024 / (8 * sizeof (unsigned long int)))
-typedef struct
-  {
-    unsigned long int __val[_SIGSET_NWORDS];
-  } __sigset_t;
+typedef unsigned long __sigset_t;
 
 #endif
 
@@ -47,79 +43,27 @@ typedef struct
 # endif
 
 /* Return a mask that includes the bit for SIG only.  */
-# define __sigmask(sig) \
-  (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int))))
-
-/* Return the word index for SIG.  */
-# define __sigword(sig)	(((sig) - 1) / (8 * sizeof (unsigned long int)))
+# define __sigmask(sig) (1L << ((sig) - 1))
 
 # if defined __GNUC__ && __GNUC__ >= 2
-#  define __sigemptyset(set) \
-  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
-		    sigset_t *__set = (set);				      \
-		    while (--__cnt >= 0) __set->__val[__cnt] = 0;	      \
-		    0; }))
-#  define __sigfillset(set) \
-  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
-		    sigset_t *__set = (set);				      \
-		    while (--__cnt >= 0) __set->__val[__cnt] = ~0UL;	      \
-		    0; }))
+#  define __sigemptyset(set) (*(set) = 0)
+#  define __sigfillset(set) (*(set) = ~0)
 
 #  ifdef __USE_GNU
 /* The POSIX does not specify for handling the whole signal set in one
    command.  This is often wanted and so we define three more functions
    here.  */
-#   define __sigisemptyset(set) \
-  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
-		    const sigset_t *__set = (set);			      \
-		    int __ret = __set->__val[--__cnt];			      \
-		    while (!__ret && --__cnt >= 0)			      \
-			__ret = __set->__val[__cnt];			      \
-		    __ret == 0; }))
-#   define __sigandset(dest, left, right) \
-  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
-		    sigset_t *__dest = (dest);				      \
-		    const sigset_t *__left = (left);			      \
-		    const sigset_t *__right = (right);			      \
-		    while (--__cnt >= 0)				      \
-		      __dest->__val[__cnt] = (__left->__val[__cnt]	      \
-					      & __right->__val[__cnt]);	      \
-		    0; }))
-#   define __sigorset(dest, left, right) \
-  (__extension__ ({ int __cnt = _SIGSET_NWORDS;				      \
-		    sigset_t *__dest = (dest);				      \
-		    const sigset_t *__left = (left);			      \
-		    const sigset_t *__right = (right);			      \
-		    while (--__cnt >= 0)				      \
-		      __dest->__val[__cnt] = (__left->__val[__cnt]	      \
-					      | __right->__val[__cnt]);	      \
-		    0; }))
+#   define __sigisemptyset(set) (*(set) == 0)
+#   define __sigandset(dest, left, right) (*(dest) = *(left) & *(right))
+#   define __sigorset(dest, left, right) (*(dest) = *(left) | *(right))
 #  endif
 # endif
 
 /* These functions needn't check for a bogus signal number -- error
    checking is done in the non __ versions.  */
 
-extern int __sigismember (__const __sigset_t *, int);
-extern int __sigaddset (__sigset_t *, int);
-extern int __sigdelset (__sigset_t *, int);
-
-# ifdef __USE_EXTERN_INLINES
-#  define __SIGSETFN(NAME, BODY, CONST)					      \
-  _EXTERN_INLINE int							      \
-  NAME (CONST __sigset_t *__set, int __sig)				      \
-  {									      \
-    unsigned long int __mask = __sigmask (__sig);			      \
-    unsigned long int __word = __sigword (__sig);			      \
-    return BODY;							      \
-  }
-
-__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const)
-__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), )
-__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
-
-#  undef __SIGSETFN
-# endif
-
+# define __sigismember(set, sig) (*(set) & (1L << ((sig)-1)))
+# define __sigaddset(set, sig) (*(set) |= (1L << ((sig)-1)))
+# define __sigdelset(set, sig) (*(set) &= ~(1L << ((sig)-1)))
 
 #endif /* ! _SIGSET_H_fns.  */
diff --git a/libc/sysdeps/linux/arm/crt0.S b/libc/sysdeps/linux/arm/crt0.S
index 01bcb321f..65253881c 100644
--- a/libc/sysdeps/linux/arm/crt0.S
+++ b/libc/sysdeps/linux/arm/crt0.S
@@ -62,6 +62,7 @@ _start:
 	/* Ok, now run uClibc's main() -- shouldn't return */
 	bl	__uClibc_main
 
+#if 0 /* this is already provided by crtbegin/crtend in the arm-elf compiler */
 /* a little bit of stuff to support C++ */
 	.section .ctors,"aw"
 	.align 4
@@ -74,3 +75,4 @@ __CTOR_LIST__:
 	.global __DTOR_LIST__
 __DTOR_LIST__:
 	.long -1
+#endif