Move NSIG ifdefery to a separate header file

* nsig.h: New file.
* Makefile.am (strace_SOURCES): Add it.
* signal.c: Include "nsig.h" instead of <signal.h>, remove
NSIG workarounds.
* sigreturn.c: Likewise.
* syscall.c: Likewise.
* tests/pselect6.c: Likewise.

Makefile.am

@@ -170,6 +170,7 @@ strace_SOURCES =	\
 	native_defs.h	\
 	net.c		\
 	netlink.c       \
+	nsig.h		\
 	numa.c		\
 	oldstat.c	\
 	open.c		\

nsig.h

@@ -0,0 +1,13 @@
+#ifndef STRACE_NSIG_H
+#define STRACE_NSIG_H
+
+#include <signal.h>
+
+#ifndef NSIG
+# warning NSIG is not defined, using 32
+# define NSIG  32
+#elif NSIG < 32
+# error NSIG < 32
+#endif
+
+#endif /* !STRACE_NSIG_H */

signal.c

@@ -32,14 +32,7 @@
  */
 
 #include "defs.h"
-#include <signal.h>
-
-#ifndef NSIG
-# warning NSIG is not defined, using 32
-# define NSIG 32
-#elif NSIG < 32
-# error NSIG < 32
-#endif
+#include "nsig.h"
 
 /* The libc headers do not define this constant since it should only be
    used by the implementation.  So we define it here.  */

sigreturn.c

@@ -1,5 +1,5 @@
 #include "defs.h"
-#include <signal.h>
+#include "nsig.h"
 #include "regs.h"
 #include "ptrace.h"
 
@@ -7,13 +7,6 @@
 # include <asm/sigcontext.h>
 #endif
 
-#ifndef NSIG
-# warning NSIG is not defined, using 32
-# define NSIG 32
-#elif NSIG < 32
-# error NSIG < 32
-#endif
-
 #include "arch_sigreturn.c"
 
 SYS_FUNC(sigreturn)

syscall.c

@@ -33,8 +33,8 @@
 
 #include "defs.h"
 #include "native_defs.h"
+#include "nsig.h"
 #include <sys/param.h>
-#include <signal.h>
 
 /* for struct iovec */
 #include <sys/uio.h>
@@ -63,11 +63,6 @@
 # define NT_PRSTATUS 1
 #endif
 
-#ifndef NSIG
-# warning: NSIG is not defined, using 32
-# define NSIG 32
-#endif
-
 #include "syscall.h"
 
 /* Define these shorthand notations to simplify the syscallent files. */

tests/pselect6.c

@@ -30,9 +30,9 @@
  */
 
 #include "tests.h"
+#include "nsig.h"
 #include <assert.h>
 #include <stdio.h>
-#include <signal.h>
 #include <unistd.h>
 #include <sys/select.h>
 #include <asm/unistd.h>
@@ -40,11 +40,6 @@
 
 #ifdef __NR_pselect6
 
-#ifndef NSIG
-# warning NSIG is not defined, using 32
-# define NSIG 32
-#endif
-
 static fd_set set[3][0x1000000 / sizeof(fd_set)];
 
 static void