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.

7 files changed, 75 insertions, 59 deletions

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.  */