Condition some sys/ucontext.h contents on __USE_MISC (bug 21457).

Continuing the fixes for namespace issues arising from sys/ucontext.h,
this patch conditions various definitions, that are not needed for
defining mcontext_t / ucontext_t, on __USE_MISC, so they do not appear
in strict POSIX modes.

This patch is non-exhaustive; that is, it only conditions
straightforward cases and there may be more such definitions that can
be conditioned for these and other architectures, to be dealt with
later in separate patches.  Also, using __USE_MISC is the minimum
change for these definitions where they conflict with POSIX; some
headers already have __USE_GNU conditionals on similar definitions of
names for registers.  The patch specifically does not do anything with
definitions in bits/sigcontext.h, and nor does it condition any
inclusions of bits/sigcontext.h even where in fact that is not needed
on some architectures for the definitions of mcontext_t / ucontext_t.

As other namespace issues in these headers remain, this patch does not
fix bug 21457, nor allow any XFAILs to be removed.

Tested with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h (R0): Condition on [__USE_MISC].
	(R1): Likewise.
	(R2): Likewise.
	(R3): Likewise.
	(R4): Likewise.
	(R5): Likewise.
	(R6): Likewise.
	(R7): Likewise.
	(R8): Likewise.
	(R9): Likewise.
	(R10): Likewise.
	(R11): Likewise.
	(R12): Likewise.
	(R13): Likewise.
	(R14): Likewise.
	(R15): Likewise.
	* sysdeps/i386/sys/ucontext.h (REG_GS): Likewise.
	(REG_FS): Likewise.
	(REG_ES): Likewise.
	(REG_DS): Likewise.
	(REG_EDI): Likewise.
	(REG_ESI): Likewise.
	(REG_EBP): Likewise.
	(REG_ESP): Likewise.
	(REG_EBX): Likewise.
	(REG_EDX): Likewise.
	(REG_ECX): Likewise.
	(REG_EAX): Likewise.
	(REG_TRAPNO): Likewise.
	(REG_ERR): Likewise.
	(REG_EIP): Likewise.
	(REG_CS): Likewise.
	(REG_EFL): Likewise.
	(REG_UESP): Likewise.
	(REG_SS): Likewise.
	* sysdeps/m68k/sys/ucontext.h (R_D0): Likewise.
	(R_D1): Likewise.
	(R_D2): Likewise.
	(R_D3): Likewise.
	(R_D4): Likewise.
	(R_D5): Likewise.
	(R_D6): Likewise.
	(R_D7): Likewise.
	(R_A0): Likewise.
	(R_A1): Likewise.
	(R_A2): Likewise.
	(R_A3): Likewise.
	(R_A4): Likewise.
	(R_A5): Likewise.
	(R_A6): Likewise.
	(R_A7): Likewise.
	(R_SP): Likewise.
	(R_PC): Likewise.
	(R_PS): Likewise.
	(fpregset_t): Likewise.
	(MCONTEXT_VERSION): Likewise.
	* sysdeps/mips/sys/ucontext.h (CTX_R0): Likewise.
	(CTX_AT): Likewise.
	(CTX_V0): Likewise.
	(CTX_V1): Likewise.
	(CTX_A0): Likewise.
	(CTX_A1): Likewise.
	(CTX_A2): Likewise.
	(CTX_A3): Likewise.
	(CTX_T0): Likewise.
	(CTX_T1): Likewise.
	(CTX_T2): Likewise.
	(CTX_T3): Likewise.
	(CTX_T4): Likewise.
	(CTX_T5): Likewise.
	(CTX_T6): Likewise.
	(CTX_T7): Likewise.
	(CTX_S0): Likewise.
	(CTX_S1): Likewise.
	(CTX_S2): Likewise.
	(CTX_S3): Likewise.
	(CTX_S4): Likewise.
	(CTX_S5): Likewise.
	(CTX_S6): Likewise.
	(CTX_S7): Likewise.
	(CTX_T8): Likewise.
	(CTX_T9): Likewise.
	(CTX_K0): Likewise.
	(CTX_K1): Likewise.
	(CTX_GP): Likewise.
	(CTX_SP): Likewise.
	(CTX_S8): Likewise.
	(CTX_RA): Likewise.
	(CTX_MDLO): Likewise.
	(CTX_MDHI): Likewise.
	(CTX_CAUSE): Likewise.
	(CTX_EPC): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Condition
	inclusion of <sys/procfs.h> on [__USE_MISC].
	(greg_t): Condition on [__USE_MISC].
	(gregset_t): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h (greg_t): Likewise.
	(NGREG): Likewise.
	(gregset_t): Likewise.
	(REG_R0): Likewise.
	(REG_R1): Likewise.
	(REG_R2): Likewise.
	(REG_R3): Likewise.
	(REG_R4): Likewise.
	(REG_R5): Likewise.
	(REG_R6): Likewise.
	(REG_R7): Likewise.
	(REG_R8): Likewise.
	(REG_R9): Likewise.
	(REG_R10): Likewise.
	(REG_R11): Likewise.
	(REG_R12): Likewise.
	(REG_R13): Likewise.
	(REG_R14): Likewise.
	(REG_R15): Likewise.
	(struct _libc_fpstate): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h (NGREG): Likewise.
	(NFPREG): Likewise.
	(gregset_t): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (R_D0): Likewise.
	(R_D1): Likewise.
	(R_D2): Likewise.
	(R_D3): Likewise.
	(R_D4): Likewise.
	(R_D5): Likewise.
	(R_D6): Likewise.
	(R_D7): Likewise.
	(R_A0): Likewise.
	(R_A1): Likewise.
	(R_A2): Likewise.
	(R_A3): Likewise.
	(R_A4): Likewise.
	(R_A5): Likewise.
	(R_A6): Likewise.
	(R_A7): Likewise.
	(R_SP): Likewise.
	(R_PC): Likewise.
	(R_PS): Likewise.
	(fpregset_t): Likewise.
	(MCONTEXT_VERSION): Likewise.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (MCONTEXT_VERSION):
	Likewise.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (REG_R0): Likewise.
	(REG_R1): Likewise.
	(REG_R2): Likewise.
	(REG_R3): Likewise.
	(REG_R4): Likewise.
	(REG_R5): Likewise.
	(REG_R6): Likewise.
	(REG_R7): Likewise.
	(REG_R8): Likewise.
	(REG_R9): Likewise.
	(REG_R10): Likewise.
	(REG_R11): Likewise.
	(REG_R12): Likewise.
	(REG_R13): Likewise.
	(REG_R14): Likewise.
	(REG_R15): Likewise.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Condition inclusion
	of <arch/abi.h> on [__USE_MISC].
	(greg_t): Condition on [__USE_MISC].
	(NGREG): Likewise.
	(gregset_t): Likewise.

12 files changed, 346 insertions, 150 deletions

diff --git a/ChangeLog b/ChangeLog
index 95611f3a1f..d886161b20 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,173 @@
+2017-05-11  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #21457]
+	* sysdeps/arm/sys/ucontext.h (R0): Condition on [__USE_MISC].
+	(R1): Likewise.
+	(R2): Likewise.
+	(R3): Likewise.
+	(R4): Likewise.
+	(R5): Likewise.
+	(R6): Likewise.
+	(R7): Likewise.
+	(R8): Likewise.
+	(R9): Likewise.
+	(R10): Likewise.
+	(R11): Likewise.
+	(R12): Likewise.
+	(R13): Likewise.
+	(R14): Likewise.
+	(R15): Likewise.
+	* sysdeps/i386/sys/ucontext.h (REG_GS): Likewise.
+	(REG_FS): Likewise.
+	(REG_ES): Likewise.
+	(REG_DS): Likewise.
+	(REG_EDI): Likewise.
+	(REG_ESI): Likewise.
+	(REG_EBP): Likewise.
+	(REG_ESP): Likewise.
+	(REG_EBX): Likewise.
+	(REG_EDX): Likewise.
+	(REG_ECX): Likewise.
+	(REG_EAX): Likewise.
+	(REG_TRAPNO): Likewise.
+	(REG_ERR): Likewise.
+	(REG_EIP): Likewise.
+	(REG_CS): Likewise.
+	(REG_EFL): Likewise.
+	(REG_UESP): Likewise.
+	(REG_SS): Likewise.
+	* sysdeps/m68k/sys/ucontext.h (R_D0): Likewise.
+	(R_D1): Likewise.
+	(R_D2): Likewise.
+	(R_D3): Likewise.
+	(R_D4): Likewise.
+	(R_D5): Likewise.
+	(R_D6): Likewise.
+	(R_D7): Likewise.
+	(R_A0): Likewise.
+	(R_A1): Likewise.
+	(R_A2): Likewise.
+	(R_A3): Likewise.
+	(R_A4): Likewise.
+	(R_A5): Likewise.
+	(R_A6): Likewise.
+	(R_A7): Likewise.
+	(R_SP): Likewise.
+	(R_PC): Likewise.
+	(R_PS): Likewise.
+	(fpregset_t): Likewise.
+	(MCONTEXT_VERSION): Likewise.
+	* sysdeps/mips/sys/ucontext.h (CTX_R0): Likewise.
+	(CTX_AT): Likewise.
+	(CTX_V0): Likewise.
+	(CTX_V1): Likewise.
+	(CTX_A0): Likewise.
+	(CTX_A1): Likewise.
+	(CTX_A2): Likewise.
+	(CTX_A3): Likewise.
+	(CTX_T0): Likewise.
+	(CTX_T1): Likewise.
+	(CTX_T2): Likewise.
+	(CTX_T3): Likewise.
+	(CTX_T4): Likewise.
+	(CTX_T5): Likewise.
+	(CTX_T6): Likewise.
+	(CTX_T7): Likewise.
+	(CTX_S0): Likewise.
+	(CTX_S1): Likewise.
+	(CTX_S2): Likewise.
+	(CTX_S3): Likewise.
+	(CTX_S4): Likewise.
+	(CTX_S5): Likewise.
+	(CTX_S6): Likewise.
+	(CTX_S7): Likewise.
+	(CTX_T8): Likewise.
+	(CTX_T9): Likewise.
+	(CTX_K0): Likewise.
+	(CTX_K1): Likewise.
+	(CTX_GP): Likewise.
+	(CTX_SP): Likewise.
+	(CTX_S8): Likewise.
+	(CTX_RA): Likewise.
+	(CTX_MDLO): Likewise.
+	(CTX_MDHI): Likewise.
+	(CTX_CAUSE): Likewise.
+	(CTX_EPC): Likewise.
+	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Condition
+	inclusion of <sys/procfs.h> on [__USE_MISC].
+	(greg_t): Condition on [__USE_MISC].
+	(gregset_t): Likewise.
+	(fpregset_t): Likewise.
+	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h (greg_t): Likewise.
+	(NGREG): Likewise.
+	(gregset_t): Likewise.
+	(REG_R0): Likewise.
+	(REG_R1): Likewise.
+	(REG_R2): Likewise.
+	(REG_R3): Likewise.
+	(REG_R4): Likewise.
+	(REG_R5): Likewise.
+	(REG_R6): Likewise.
+	(REG_R7): Likewise.
+	(REG_R8): Likewise.
+	(REG_R9): Likewise.
+	(REG_R10): Likewise.
+	(REG_R11): Likewise.
+	(REG_R12): Likewise.
+	(REG_R13): Likewise.
+	(REG_R14): Likewise.
+	(REG_R15): Likewise.
+	(struct _libc_fpstate): Likewise.
+	(fpregset_t): Likewise.
+	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h (NGREG): Likewise.
+	(NFPREG): Likewise.
+	(gregset_t): Likewise.
+	(fpregset_t): Likewise.
+	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (R_D0): Likewise.
+	(R_D1): Likewise.
+	(R_D2): Likewise.
+	(R_D3): Likewise.
+	(R_D4): Likewise.
+	(R_D5): Likewise.
+	(R_D6): Likewise.
+	(R_D7): Likewise.
+	(R_A0): Likewise.
+	(R_A1): Likewise.
+	(R_A2): Likewise.
+	(R_A3): Likewise.
+	(R_A4): Likewise.
+	(R_A5): Likewise.
+	(R_A6): Likewise.
+	(R_A7): Likewise.
+	(R_SP): Likewise.
+	(R_PC): Likewise.
+	(R_PS): Likewise.
+	(fpregset_t): Likewise.
+	(MCONTEXT_VERSION): Likewise.
+	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (MCONTEXT_VERSION):
+	Likewise.
+	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (REG_R0): Likewise.
+	(REG_R1): Likewise.
+	(REG_R2): Likewise.
+	(REG_R3): Likewise.
+	(REG_R4): Likewise.
+	(REG_R5): Likewise.
+	(REG_R6): Likewise.
+	(REG_R7): Likewise.
+	(REG_R8): Likewise.
+	(REG_R9): Likewise.
+	(REG_R10): Likewise.
+	(REG_R11): Likewise.
+	(REG_R12): Likewise.
+	(REG_R13): Likewise.
+	(REG_R14): Likewise.
+	(REG_R15): Likewise.
+	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Condition inclusion
+	of <arch/abi.h> on [__USE_MISC].
+	(greg_t): Condition on [__USE_MISC].
+	(NGREG): Likewise.
+	(gregset_t): Likewise.
+
 2017-05-11  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
 	* sysdeps/arm/nptl/bits/pthreadtypes-arch.h
diff --git a/sysdeps/arm/sys/ucontext.h b/sysdeps/arm/sys/ucontext.h
index f2cc43d341..09fe418b3c 100644
--- a/sysdeps/arm/sys/ucontext.h
+++ b/sysdeps/arm/sys/ucontext.h
@@ -37,42 +37,44 @@ typedef int greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   R0 = 0,
-#define R0	R0
+# define R0	R0
   R1 = 1,
-#define R1	R1
+# define R1	R1
   R2 = 2,
-#define R2	R2
+# define R2	R2
   R3 = 3,
-#define R3	R3
+# define R3	R3
   R4 = 4,
-#define R4	R4
+# define R4	R4
   R5 = 5,
-#define R5	R5
+# define R5	R5
   R6 = 6,
-#define R6	R6
+# define R6	R6
   R7 = 7,
-#define R7	R7
+# define R7	R7
   R8 = 8,
-#define R8	R8
+# define R8	R8
   R9 = 9,
-#define R9	R9
+# define R9	R9
   R10 = 10,
-#define R10	R10
+# define R10	R10
   R11 = 11,
-#define R11	R11
+# define R11	R11
   R12 = 12,
-#define R12	R12
+# define R12	R12
   R13 = 13,
-#define R13	R13
+# define R13	R13
   R14 = 14,
-#define R14	R14
+# define R14	R14
   R15 = 15,
-#define R15	R15
+# define R15	R15
 };
+#endif
 
 /* Structure to describe FPU registers.  */
 typedef struct fpregset
diff --git a/sysdeps/i386/sys/ucontext.h b/sysdeps/i386/sys/ucontext.h
index 055d4aaf28..c632e50eba 100644
--- a/sysdeps/i386/sys/ucontext.h
+++ b/sysdeps/i386/sys/ucontext.h
@@ -38,48 +38,50 @@ typedef int greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   REG_GS = 0,
-#define REG_GS	REG_GS
+# define REG_GS	REG_GS
   REG_FS,
-#define REG_FS	REG_FS
+# define REG_FS	REG_FS
   REG_ES,
-#define REG_ES	REG_ES
+# define REG_ES	REG_ES
   REG_DS,
-#define REG_DS	REG_DS
+# define REG_DS	REG_DS
   REG_EDI,
-#define REG_EDI	REG_EDI
+# define REG_EDI	REG_EDI
   REG_ESI,
-#define REG_ESI	REG_ESI
+# define REG_ESI	REG_ESI
   REG_EBP,
-#define REG_EBP	REG_EBP
+# define REG_EBP	REG_EBP
   REG_ESP,
-#define REG_ESP	REG_ESP
+# define REG_ESP	REG_ESP
   REG_EBX,
-#define REG_EBX	REG_EBX
+# define REG_EBX	REG_EBX
   REG_EDX,
-#define REG_EDX	REG_EDX
+# define REG_EDX	REG_EDX
   REG_ECX,
-#define REG_ECX	REG_ECX
+# define REG_ECX	REG_ECX
   REG_EAX,
-#define REG_EAX	REG_EAX
+# define REG_EAX	REG_EAX
   REG_TRAPNO,
-#define REG_TRAPNO	REG_TRAPNO
+# define REG_TRAPNO	REG_TRAPNO
   REG_ERR,
-#define REG_ERR	REG_ERR
+# define REG_ERR	REG_ERR
   REG_EIP,
-#define REG_EIP	REG_EIP
+# define REG_EIP	REG_EIP
   REG_CS,
-#define REG_CS	REG_CS
+# define REG_CS	REG_CS
   REG_EFL,
-#define REG_EFL	REG_EFL
+# define REG_EFL	REG_EFL
   REG_UESP,
-#define REG_UESP	REG_UESP
+# define REG_UESP	REG_UESP
   REG_SS
-#define REG_SS	REG_SS
+# define REG_SS	REG_SS
 };
+#endif
 
 /* Structure to describe FPU registers.  */
 typedef struct fpregset
diff --git a/sysdeps/m68k/sys/ucontext.h b/sysdeps/m68k/sys/ucontext.h
index 1a90751552..cbec1db5d6 100644
--- a/sysdeps/m68k/sys/ucontext.h
+++ b/sysdeps/m68k/sys/ucontext.h
@@ -38,47 +38,48 @@ typedef int greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   R_D0 = 0,
-#define R_D0	R_D0
+# define R_D0	R_D0
   R_D1 = 1,
-#define R_D1	R_D1
+# define R_D1	R_D1
   R_D2 = 2,
-#define R_D2	R_D2
+# define R_D2	R_D2
   R_D3 = 3,
-#define R_D3	R_D3
+# define R_D3	R_D3
   R_D4 = 4,
-#define R_D4	R_D4
+# define R_D4	R_D4
   R_D5 = 5,
-#define R_D5	R_D5
+# define R_D5	R_D5
   R_D6 = 6,
-#define R_D6	R_D6
+# define R_D6	R_D6
   R_D7 = 7,
-#define R_D7	R_D7
+# define R_D7	R_D7
   R_A0 = 8,
-#define R_A0	R_A0
+# define R_A0	R_A0
   R_A1 = 9,
-#define R_A1	R_A1
+# define R_A1	R_A1
   R_A2 = 10,
-#define R_A2	R_A2
+# define R_A2	R_A2
   R_A3 = 11,
-#define R_A3	R_A3
+# define R_A3	R_A3
   R_A4 = 12,
-#define R_A4	R_A4
+# define R_A4	R_A4
   R_A5 = 13,
-#define R_A5	R_A5
+# define R_A5	R_A5
   R_A6 = 14,
-#define R_A6	R_A6
+# define R_A6	R_A6
   R_A7 = 15,
-#define R_A7	R_A7
+# define R_A7	R_A7
   R_SP = 15,
-#define R_SP	R_SP
+# define R_SP	R_SP
   R_PC = 16,
-#define R_PC	R_PC
+# define R_PC	R_PC
   R_PS = 17
-#define R_PS	R_PS
+# define R_PS	R_PS
 };
 
 /* Structure to describe FPU registers.  */
@@ -89,6 +90,7 @@ typedef struct fpregset
   int f_fpiaddr;
   int f_fpregs[8][3];
 } fpregset_t;
+#endif
 
 /* Context to describe whole processor state.  */
 typedef struct
@@ -97,7 +99,9 @@ typedef struct
   gregset_t gregs;
 } mcontext_t;
 
-#define MCONTEXT_VERSION 1
+#ifdef __USE_MISC
+# define MCONTEXT_VERSION 1
+#endif
 
 /* Userlevel context.  */
 typedef struct ucontext
diff --git a/sysdeps/mips/sys/ucontext.h b/sysdeps/mips/sys/ucontext.h
index 348b7ef41b..137246f961 100644
--- a/sysdeps/mips/sys/ucontext.h
+++ b/sysdeps/mips/sys/ucontext.h
@@ -44,82 +44,84 @@ typedef __uint64_t greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   CTX_R0 = 0,
-#define CTX_R0	CTX_R0
+# define CTX_R0	CTX_R0
   CTX_AT = 1,
-#define CTX_AT	CTX_AT
+# define CTX_AT	CTX_AT
   CTX_V0 = 2,
-#define CTX_V0	CTX_V0
+# define CTX_V0	CTX_V0
   CTX_V1 = 3,
-#define CTX_V1	CTX_V1
+# define CTX_V1	CTX_V1
   CTX_A0 = 4,
-#define CTX_A0	CTX_A0
+# define CTX_A0	CTX_A0
   CTX_A1 = 5,
-#define CTX_A1	CTX_A1
+# define CTX_A1	CTX_A1
   CTX_A2 = 6,
-#define CTX_A2	CTX_A2
+# define CTX_A2	CTX_A2
   CTX_A3 = 7,
-#define CTX_A3	CTX_A3
+# define CTX_A3	CTX_A3
   CTX_T0 = 8,
-#define CTX_T0	CTX_T0
+# define CTX_T0	CTX_T0
   CTX_T1 = 9,
-#define CTX_T1	CTX_T1
+# define CTX_T1	CTX_T1
   CTX_T2 = 10,
-#define CTX_T2	CTX_T2
+# define CTX_T2	CTX_T2
   CTX_T3 = 11,
-#define CTX_T3	CTX_T3
+# define CTX_T3	CTX_T3
   CTX_T4 = 12,
-#define CTX_T4	CTX_T4
+# define CTX_T4	CTX_T4
   CTX_T5 = 13,
-#define CTX_T5	CTX_T5
+# define CTX_T5	CTX_T5
   CTX_T6 = 14,
-#define CTX_T6	CTX_T6
+# define CTX_T6	CTX_T6
   CTX_T7 = 15,
-#define CTX_T7	CTX_T7
+# define CTX_T7	CTX_T7
   CTX_S0 = 16,
-#define CTX_S0	CTX_S0
+# define CTX_S0	CTX_S0
   CTX_S1 = 17,
-#define CTX_S1	CTX_S1
+# define CTX_S1	CTX_S1
   CTX_S2 = 18,
-#define CTX_S2	CTX_S2
+# define CTX_S2	CTX_S2
   CTX_S3 = 19,
-#define CTX_S3	CTX_S3
+# define CTX_S3	CTX_S3
   CTX_S4 = 20,
-#define CTX_S4	CTX_S4
+# define CTX_S4	CTX_S4
   CTX_S5 = 21,
-#define CTX_S5	CTX_S5
+# define CTX_S5	CTX_S5
   CTX_S6 = 22,
-#define CTX_S6	CTX_S6
+# define CTX_S6	CTX_S6
   CTX_S7 = 23,
-#define CTX_S7	CTX_S7
+# define CTX_S7	CTX_S7
   CTX_T8 = 24,
-#define CTX_T8	CTX_T8
+# define CTX_T8	CTX_T8
   CTX_T9 = 25,
-#define CTX_T9	CTX_T9
+# define CTX_T9	CTX_T9
   CTX_K0 = 26,
-#define CTX_K0	CTX_K0
+# define CTX_K0	CTX_K0
   CTX_K1 = 27,
-#define CTX_K1	CTX_K1
+# define CTX_K1	CTX_K1
   CTX_GP = 28,
-#define CTX_GP	CTX_GP
+# define CTX_GP	CTX_GP
   CTX_SP = 29,
-#define CTX_SP	CTX_SP
+# define CTX_SP	CTX_SP
   CTX_S8 = 30,
-#define CTX_S8	CTX_S8
+# define CTX_S8	CTX_S8
   CTX_RA = 31,
-#define CTX_RA	CTX_RA
+# define CTX_RA	CTX_RA
   CTX_MDLO = 32,
-#define CTX_MDLO	CTX_MDLO
+# define CTX_MDLO	CTX_MDLO
   CTX_MDHI = 33,
-#define CTX_MDHI	CTX_MDHI
+# define CTX_MDHI	CTX_MDHI
   CTX_CAUSE = 34,
-#define CTX_CAUSE	CTX_CAUSE
+# define CTX_CAUSE	CTX_CAUSE
   CTX_EPC = 35,
-#define CTX_EPC	CTX_EPC
+# define CTX_EPC	CTX_EPC
 };
+#endif
 
 /* Structure to describe FPU registers.  */
 typedef struct fpregset
diff --git a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
index 0bf101ada5..536404dd71 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
@@ -29,7 +29,8 @@
 #include <bits/sigcontext.h>
 #include <bits/sigstack.h>
 
-#include <sys/procfs.h>
+#ifdef __USE_MISC
+# include <sys/procfs.h>
 
 
 typedef elf_greg_t greg_t;
@@ -39,6 +40,7 @@ typedef elf_gregset_t gregset_t;
 
 /* Structure to describe FPU registers.  */
 typedef elf_fpregset_t	fpregset_t;
+#endif
 
 /* Context to describe whole processor state.  This only describes
    the core registers; coprocessor registers get saved elsewhere
diff --git a/sysdeps/unix/sysv/linux/arm/sys/ucontext.h b/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
index cdd39654eb..aedeccdabe 100644
--- a/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
@@ -29,10 +29,11 @@
 #include <bits/sigstack.h>
 
 
+#ifdef __USE_MISC
 typedef int greg_t;
 
 /* Number of general registers.  */
-#define NGREG	18
+# define NGREG	18
 
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
@@ -41,37 +42,37 @@ typedef greg_t gregset_t[NGREG];
 enum
 {
   REG_R0 = 0,
-#define REG_R0	REG_R0
+# define REG_R0	REG_R0
   REG_R1 = 1,
-#define REG_R1	REG_R1
+# define REG_R1	REG_R1
   REG_R2 = 2,
-#define REG_R2	REG_R2
+# define REG_R2	REG_R2
   REG_R3 = 3,
-#define REG_R3	REG_R3
+# define REG_R3	REG_R3
   REG_R4 = 4,
-#define REG_R4	REG_R4
+# define REG_R4	REG_R4
   REG_R5 = 5,
-#define REG_R5	REG_R5
+# define REG_R5	REG_R5
   REG_R6 = 6,
-#define REG_R6	REG_R6
+# define REG_R6	REG_R6
   REG_R7 = 7,
-#define REG_R7	REG_R7
+# define REG_R7	REG_R7
   REG_R8 = 8,
-#define REG_R8	REG_R8
+# define REG_R8	REG_R8
   REG_R9 = 9,
-#define REG_R9	REG_R9
+# define REG_R9	REG_R9
   REG_R10 = 10,
-#define REG_R10	REG_R10
+# define REG_R10	REG_R10
   REG_R11 = 11,
-#define REG_R11	REG_R11
+# define REG_R11	REG_R11
   REG_R12 = 12,
-#define REG_R12	REG_R12
+# define REG_R12	REG_R12
   REG_R13 = 13,
-#define REG_R13	REG_R13
+# define REG_R13	REG_R13
   REG_R14 = 14,
-#define REG_R14	REG_R14
+# define REG_R14	REG_R14
   REG_R15 = 15
-#define REG_R15	REG_R15
+# define REG_R15	REG_R15
 };
 
 struct _libc_fpstate
@@ -93,6 +94,7 @@ struct _libc_fpstate
 };
 /* Structure to describe FPU registers.  */
 typedef struct _libc_fpstate fpregset_t;
+#endif
 
 /* Context to describe whole processor state.  This only describes
    the core registers; coprocessor registers get saved elsewhere
diff --git a/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h b/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
index 8faac50433..31eb77e01b 100644
--- a/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
@@ -29,12 +29,13 @@
 #include <bits/sigstack.h>
 
 
+#ifdef __USE_MISC
 /* Type for general register.  */
 typedef unsigned long int greg_t;
 
 /* Number of general registers.  */
-#define NGREG	80
-#define NFPREG	32
+# define NGREG	80
+# define NFPREG	32
 
 /* Container for all general registers.  */
 typedef struct gregset
@@ -50,6 +51,7 @@ typedef struct fpregset
   {
     double fp_dregs[32];
   } fpregset_t;
+#endif
 
 /* Context to describe whole processor state.  */
 typedef struct sigcontext mcontext_t;
diff --git a/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h b/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
index 977b4ee6cd..3c5dce5b73 100644
--- a/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
@@ -38,48 +38,50 @@ typedef int greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   R_D0 = 0,
-#define R_D0	R_D0
+# define R_D0	R_D0
   R_D1 = 1,
-#define R_D1	R_D1
+# define R_D1	R_D1
   R_D2 = 2,
-#define R_D2	R_D2
+# define R_D2	R_D2
   R_D3 = 3,
-#define R_D3	R_D3
+# define R_D3	R_D3
   R_D4 = 4,
-#define R_D4	R_D4
+# define R_D4	R_D4
   R_D5 = 5,
-#define R_D5	R_D5
+# define R_D5	R_D5
   R_D6 = 6,
-#define R_D6	R_D6
+# define R_D6	R_D6
   R_D7 = 7,
-#define R_D7	R_D7
+# define R_D7	R_D7
   R_A0 = 8,
-#define R_A0	R_A0
+# define R_A0	R_A0
   R_A1 = 9,
-#define R_A1	R_A1
+# define R_A1	R_A1
   R_A2 = 10,
-#define R_A2	R_A2
+# define R_A2	R_A2
   R_A3 = 11,
-#define R_A3	R_A3
+# define R_A3	R_A3
   R_A4 = 12,
-#define R_A4	R_A4
+# define R_A4	R_A4
   R_A5 = 13,
-#define R_A5	R_A5
+# define R_A5	R_A5
   R_A6 = 14,
-#define R_A6	R_A6
+# define R_A6	R_A6
   R_A7 = 15,
-#define R_A7	R_A7
+# define R_A7	R_A7
   R_SP = 15,
-#define R_SP	R_SP
+# define R_SP	R_SP
   R_PC = 16,
-#define R_PC	R_PC
+# define R_PC	R_PC
   R_PS = 17
-#define R_PS	R_PS
+# define R_PS	R_PS
 };
+#endif
 
 /* Structure to describe FPU registers.  */
 typedef struct fpregset
@@ -102,7 +104,9 @@ typedef struct
   fpregset_t fpregs;
 } mcontext_t;
 
-#define MCONTEXT_VERSION 2
+#ifdef __USE_MISC
+# define MCONTEXT_VERSION 2
+#endif
 
 /* Userlevel context.  */
 typedef struct ucontext
diff --git a/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h b/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
index 6701d7ed94..3b0a615abe 100644
--- a/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
@@ -32,7 +32,9 @@
 
 /* These definitions must be in sync with the kernel.  */
 
-#define MCONTEXT_VERSION 2
+#ifdef __USE_MISC
+# define MCONTEXT_VERSION 2
+#endif
 
 /* Context to describe whole processor state.  */
 typedef struct mcontext
diff --git a/sysdeps/unix/sysv/linux/sh/sys/ucontext.h b/sysdeps/unix/sysv/linux/sh/sys/ucontext.h
index 9fa479c151..5c6a5e4a7a 100644
--- a/sysdeps/unix/sysv/linux/sh/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/sh/sys/ucontext.h
@@ -37,42 +37,44 @@ typedef int greg_t;
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
 
+#ifdef __USE_MISC
 /* Number of each register is the `gregset_t' array.  */
 enum
 {
   REG_R0 = 0,
-#define REG_R0	REG_R0
+# define REG_R0	REG_R0
   REG_R1 = 1,
-#define REG_R1	REG_R1
+# define REG_R1	REG_R1
   REG_R2 = 2,
-#define REG_R2	REG_R2
+# define REG_R2	REG_R2
   REG_R3 = 3,
-#define REG_R3	REG_R3
+# define REG_R3	REG_R3
   REG_R4 = 4,
-#define REG_R4	REG_R4
+# define REG_R4	REG_R4
   REG_R5 = 5,
-#define REG_R5	REG_R5
+# define REG_R5	REG_R5
   REG_R6 = 6,
-#define REG_R6	REG_R6
+# define REG_R6	REG_R6
   REG_R7 = 7,
-#define REG_R7	REG_R7
+# define REG_R7	REG_R7
   REG_R8 = 8,
-#define REG_R8	REG_R8
+# define REG_R8	REG_R8
   REG_R9 = 9,
-#define REG_R9	REG_R9
+# define REG_R9	REG_R9
   REG_R10 = 10,
-#define REG_R10	REG_R10
+# define REG_R10	REG_R10
   REG_R11 = 11,
-#define REG_R11	REG_R11
+# define REG_R11	REG_R11
   REG_R12 = 12,
-#define REG_R12	REG_R12
+# define REG_R12	REG_R12
   REG_R13 = 13,
-#define REG_R13	REG_R13
+# define REG_R13	REG_R13
   REG_R14 = 14,
-#define REG_R14	REG_R14
+# define REG_R14	REG_R14
   REG_R15 = 15,
-#define REG_R15	REG_R15
+# define REG_R15	REG_R15
 };
+#endif
 
 typedef int freg_t;
 
diff --git a/sysdeps/unix/sysv/linux/tile/sys/ucontext.h b/sysdeps/unix/sysv/linux/tile/sys/ucontext.h
index 247f2976fb..95e6dd68f5 100644
--- a/sysdeps/unix/sysv/linux/tile/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/tile/sys/ucontext.h
@@ -27,18 +27,20 @@
 #include <bits/sigcontext.h>
 #include <bits/sigstack.h>
 
+#ifdef __USE_MISC
 /* Get register type and register names. */
-#include <arch/abi.h>
+# include <arch/abi.h>
 
 
 /* Type for general register.  */
 typedef uint_reg_t greg_t;
 
 /* Number of general registers.  Must agree with <asm/ptrace.h>. */
-#define NGREG	64
+# define NGREG	64
 
 /* Container for all general registers.  */
 typedef greg_t gregset_t[NGREG];
+#endif
 
 #ifdef __USE_GNU
 /* Names for interesting registers in the `gregset_t' array.  */