7 files changed, 40 insertions, 32 deletions
diff --git a/sysdeps/i386/__longjmp.S b/sysdeps/i386/__longjmp.S
index 0ec5d26a38..7e039deb8f 100644
--- a/sysdeps/i386/__longjmp.S
+++ b/sysdeps/i386/__longjmp.S
@@ -19,6 +19,7 @@
 
 #include <sysdep.h>
 #define _ASM
+#define _SETJMP_H
 #include <bits/setjmp.h>
 
 ENTRY (__longjmp)
diff --git a/sysdeps/i386/bits/byteswap.h b/sysdeps/i386/bits/byteswap.h
index 326962e621..bf55c890ba 100644
--- a/sysdeps/i386/bits/byteswap.h
+++ b/sysdeps/i386/bits/byteswap.h
@@ -17,8 +17,9 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H	1
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
 
 /* Swap bytes in 16 bit value.  */
 #define __bswap_constant_16(x) \
@@ -88,5 +89,3 @@
 	__r.__l[1] = __bswap_32 (__v.__l[0]);				      \
 	__r.__ll; })
 #endif
-
-#endif /* bits/byteswap.h */
diff --git a/sysdeps/i386/bits/endian.h b/sysdeps/i386/bits/endian.h
index a5d6c5ea92..54bd9d14bb 100644
--- a/sysdeps/i386/bits/endian.h
+++ b/sysdeps/i386/bits/endian.h
@@ -1,3 +1,7 @@
 /* i386 is little-endian.  */
 
+#ifndef _ENDIAN_H
+# error "Never use <bits/endian.h> directly; include <endian.h> instead."
+#endif
+
 #define __BYTE_ORDER __LITTLE_ENDIAN
diff --git a/sysdeps/i386/bits/huge_val.h b/sysdeps/i386/bits/huge_val.h
index 65a06d8f3c..23127b4031 100644
--- a/sysdeps/i386/bits/huge_val.h
+++ b/sysdeps/i386/bits/huge_val.h
@@ -19,12 +19,10 @@
    Boston, MA 02111-1307, USA.  */
 
 #ifndef _MATH_H
-#error "Never use <bits/huge_val.h> directly; include <math.h> instead."
+# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
 #endif
 
-
 #include <features.h>
-#include <sys/cdefs.h>
 
 /* IEEE positive infinity (-HUGE_VAL is negative infinity).  */
 
@@ -32,11 +30,11 @@
 
 #define __huge_val_t	union { unsigned char __c[8]; double __d; }
 #ifdef	__GNUC__
-#define	HUGE_VAL	(__extension__ \
+# define HUGE_VAL	(__extension__ \
 			 ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
 #else	/* Not GCC.  */
 static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
-#define	HUGE_VAL	(__huge_val.__d)
+# define HUGE_VAL	(__huge_val.__d)
 #endif	/* GCC.  */
 
 
@@ -44,27 +42,27 @@ static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
 
 #ifdef __USE_ISOC9X
 
-#define	__HUGE_VALF_bytes	{ 0, 0, 0x80, 0x7f }
+# define __HUGE_VALF_bytes	{ 0, 0, 0x80, 0x7f }
 
-#define __huge_valf_t	union { unsigned char __c[4]; float __f; }
-#ifdef	__GNUC__
-#define	HUGE_VALF	(__extension__ \
+# define __huge_valf_t	union { unsigned char __c[4]; float __f; }
+# ifdef	__GNUC__
+#  define HUGE_VALF	(__extension__ \
 			 ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f)
-#else	/* Not GCC.  */
+# else	/* Not GCC.  */
 static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes };
-#define	HUGE_VALF	(__huge_valf.__f)
-#endif	/* GCC.  */
+#  define HUGE_VALF	(__huge_valf.__f)
+# endif	/* GCC.  */
 
 
-#define	__HUGE_VALL_bytes	{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
+# define __HUGE_VALL_bytes	{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
 
-#define __huge_vall_t	union { unsigned char __c[12]; long double __ld; }
-#ifdef	__GNUC__
-#define	HUGE_VALL	(__extension__ \
+# define __huge_vall_t	union { unsigned char __c[12]; long double __ld; }
+# ifdef	__GNUC__
+#  define HUGE_VALL	(__extension__ \
 			 ((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld)
-#else	/* Not GCC.  */
+# else	/* Not GCC.  */
 static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
-#define	HUGE_VALL	(__huge_vall.__ld)
-#endif	/* GCC.  */
+#  define HUGE_VALL	(__huge_vall.__ld)
+# endif	/* GCC.  */
 
 #endif	/* __USE_ISOC9X.  */
diff --git a/sysdeps/i386/bits/setjmp.h b/sysdeps/i386/bits/setjmp.h
index 0c03073b36..5cb60a8c7d 100644
--- a/sysdeps/i386/bits/setjmp.h
+++ b/sysdeps/i386/bits/setjmp.h
@@ -1,12 +1,16 @@
 /* Define the machine-dependent type `jmp_buf'.  Intel 386 version.  */
 
-#if	defined (__USE_MISC) || defined (_ASM)
-#define	JB_BX	0
-#define	JB_SI	1
-#define	JB_DI	2
-#define	JB_BP	3
-#define	JB_SP	4
-#define	JB_PC	5
+#ifndef _SETJMP_H
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+#if defined __USE_MISC || defined _ASM
+# define JB_BX	0
+# define JB_SI	1
+# define JB_DI	2
+# define JB_BP	3
+# define JB_SP	4
+# define JB_PC	5
 #endif
 
 #ifndef	_ASM
diff --git a/sysdeps/i386/elf/setjmp.S b/sysdeps/i386/elf/setjmp.S
index d73e84364f..bc4890c215 100644
--- a/sysdeps/i386/elf/setjmp.S
+++ b/sysdeps/i386/elf/setjmp.S
@@ -19,6 +19,7 @@
 
 #include <sysdep.h>
 #define _ASM
+#define _SETJMP_H
 #include <bits/setjmp.h>
 
 	/* We include the BSD entry points here as well but we make
diff --git a/sysdeps/i386/fpu/bits/fenv.h b/sysdeps/i386/fpu/bits/fenv.h
index 63f3e52958..4d06b01be3 100644
--- a/sysdeps/i386/fpu/bits/fenv.h
+++ b/sysdeps/i386/fpu/bits/fenv.h
@@ -17,7 +17,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #ifndef _FENV_H
-#error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
 #endif
 
 
@@ -61,7 +61,8 @@ enum
 typedef unsigned short int fexcept_t;
 
 
-/* Type representing floating-point environment.  This function corresponds to the layout of the block written by the `fstenv'.  */
+/* Type representing floating-point environment.  This function corresponds
+   to the layout of the block written by the `fstenv'.  */
 typedef struct
   {
     unsigned short int control_word;