Import the "unistd" gnulib module.

I wanted to import the pathmax module, and that pulls in the unistd
module as dependency.  The unistd module is actually bigger than the
pathmax module.  If we're going to end up with it, might as well
import it explicitly, and make use of it throughout.

The "unistd" module makes a GNU-like <unistd.h> always available.
This means we no longer need to do:

 +#ifdef HAVE_UNISTD_H
  #include <unistd.h>
 +#endif

and we can remove a few constants from defs.h.

This is just the importing step.

gdb/
2013-07-01  Pedro Alves  <palves@redhat.com>

	Import the "unistd" gnulib module.
	* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add "unistd".
	* gnulib/Makefile.in (aclocal_m4_deps): Add import/m4/off_t.m4,
	import/m4/ssize_t.m4, import/m4/sys_types_h.m4 and
	import/m4/unistd_h.m4.
	* gnulib/aclocal.m4: Renenerate.
	* gnulib/config.in: Renenerate.
	* gnulib/configure: Renenerate.
	* gnulib/import/Makefile.am: Renenerate.
	* gnulib/import/Makefile.in: Renenerate.
	* gnulib/import/m4/gnulib-cache.m4: Renenerate.
	* gnulib/import/m4/gnulib-comp.m4: Renenerate.
	* gnulib/import/m4/off_t.m4: New file.
	* gnulib/import/m4/ssize_t.m4: New file.
	* gnulib/import/m4/sys_types_h.m4: New file.
	* gnulib/import/m4/unistd_h.m4: New file.
	* gnulib/import/sys_types.in.h: New file.
	* gnulib/import/unistd.c: New file.
	* gnulib/import/unistd.in.h: New file.

1 files changed, 144 insertions, 0 deletions

diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index 7807fea..9104de1 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -199,6 +199,12 @@
 /* Define to 1 if ceill is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_CEILL
 
+/* Define to 1 if chdir is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_CHDIR
+
+/* Define to 1 if chown is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_CHOWN
+
 /* Define to 1 if copysign is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_COPYSIGN
 
@@ -217,6 +223,24 @@
 /* Define to 1 if cosl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_COSL
 
+/* Define to 1 if dup is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_DUP
+
+/* Define to 1 if dup2 is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_DUP2
+
+/* Define to 1 if dup3 is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_DUP3
+
+/* Define to 1 if endusershell is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_ENDUSERSHELL
+
+/* Define to 1 if environ is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_ENVIRON
+
+/* Define to 1 if euidaccess is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_EUIDACCESS
+
 /* Define to 1 if exp2 is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_EXP2
 
@@ -247,6 +271,18 @@
 /* Define to 1 if fabsl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_FABSL
 
+/* Define to 1 if faccessat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FACCESSAT
+
+/* Define to 1 if fchdir is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FCHDIR
+
+/* Define to 1 if fchownat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FCHOWNAT
+
+/* Define to 1 if fdatasync is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FDATASYNC
+
 /* Define to 1 if ffsl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_FFSL
 
@@ -283,6 +319,42 @@
 /* Define to 1 if frexpl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_FREXPL
 
+/* Define to 1 if fsync is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FSYNC
+
+/* Define to 1 if ftruncate is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_FTRUNCATE
+
+/* Define to 1 if getcwd is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETCWD
+
+/* Define to 1 if getdomainname is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETDOMAINNAME
+
+/* Define to 1 if getdtablesize is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETDTABLESIZE
+
+/* Define to 1 if getgroups is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETGROUPS
+
+/* Define to 1 if gethostname is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETHOSTNAME
+
+/* Define to 1 if getlogin is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETLOGIN
+
+/* Define to 1 if getlogin_r is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETLOGIN_R
+
+/* Define to 1 if getpagesize is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETPAGESIZE
+
+/* Define to 1 if getusershell is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETUSERSHELL
+
+/* Define to 1 if group_member is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GROUP_MEMBER
+
 /* Define to 1 if hypotf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_HYPOTF
 
@@ -304,15 +376,27 @@
 /* Define to 1 if imaxdiv is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_IMAXDIV
 
+/* Define to 1 if isatty is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_ISATTY
+
 /* Define to 1 if iswctype is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_ISWCTYPE
 
+/* Define to 1 if lchown is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_LCHOWN
+
 /* Define to 1 if ldexpf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_LDEXPF
 
 /* Define to 1 if ldexpl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_LDEXPL
 
+/* Define to 1 if link is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_LINK
+
+/* Define to 1 if linkat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_LINKAT
+
 /* Define to 1 if log is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_LOG
 
@@ -358,6 +442,9 @@
 /* Define to 1 if logl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_LOGL
 
+/* Define to 1 if lseek is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_LSEEK
+
 /* Define to 1 if mbrlen is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_MBRLEN
 
@@ -391,12 +478,30 @@
 /* Define to 1 if modfl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_MODFL
 
+/* Define to 1 if pipe is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_PIPE
+
+/* Define to 1 if pipe2 is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_PIPE2
+
 /* Define to 1 if powf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_POWF
 
+/* Define to 1 if pread is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_PREAD
+
+/* Define to 1 if pwrite is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_PWRITE
+
 /* Define to 1 if rawmemchr is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_RAWMEMCHR
 
+/* Define to 1 if readlink is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_READLINK
+
+/* Define to 1 if readlinkat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_READLINKAT
+
 /* Define to 1 if remainder is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_REMAINDER
 
@@ -415,6 +520,9 @@
 /* Define to 1 if rintl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_RINTL
 
+/* Define to 1 if rmdir is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_RMDIR
+
 /* Define to 1 if round is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_ROUND
 
@@ -424,6 +532,12 @@
 /* Define to 1 if roundl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_ROUNDL
 
+/* Define to 1 if sethostname is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SETHOSTNAME
+
+/* Define to 1 if setusershell is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SETUSERSHELL
+
 /* Define to 1 if sinf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_SINF
 
@@ -433,6 +547,9 @@
 /* Define to 1 if sinl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_SINL
 
+/* Define to 1 if sleep is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SLEEP
+
 /* Define to 1 if sqrtf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_SQRTF
 
@@ -487,6 +604,12 @@
 /* Define to 1 if strverscmp is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_STRVERSCMP
 
+/* Define to 1 if symlink is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SYMLINK
+
+/* Define to 1 if symlinkat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SYMLINKAT
+
 /* Define to 1 if tanf is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_TANF
 
@@ -508,6 +631,18 @@
 /* Define to 1 if truncl is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_TRUNCL
 
+/* Define to 1 if ttyname_r is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_TTYNAME_R
+
+/* Define to 1 if unlink is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_UNLINK
+
+/* Define to 1 if unlinkat is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_UNLINKAT
+
+/* Define to 1 if usleep is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_USLEEP
+
 /* Define to 1 if wcpcpy is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_WCPCPY
 
@@ -901,6 +1036,12 @@
 /* Define to a type if <wchar.h> does not define. */
 #undef mbstate_t
 
+/* Define to `int' if <sys/types.h> does not define. */
+#undef mode_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef pid_t
+
 /* Define to the equivalent of the C99 'restrict' keyword, or to
    nothing if this is not supported.  Do not define if restrict is
    supported directly.  */
@@ -915,6 +1056,9 @@
 # define __restrict__
 #endif
 
+/* Define as a signed type of the same size as size_t. */
+#undef ssize_t
+
 /* Define as a marker that can be attached to declarations that might not
     be used.  This helps to reduce warnings, such as from
     GCC -Wunused-parameter.  */