Prepare for gnulib update

After the last gnulib import (Dec 2012), gnulib upstream started
replacing mingw's 'struct timeval' with a version with 64-bit time_t,
for POSIX compliance:

 commit f8e84098084b3b53bc6943a5542af1f607ffd477
 Author: Bruno Haible <bruno@clisp.org>
 Date:   Sat Jan 28 18:12:10 2012 +0100
     sys_time: Override 'struct timeval' on some native Windows platforms.

See:

 https://lists.gnu.org/archive/html/bug-gnulib/2012-01/msg00372.html

However, that results in conflicts with native Winsock2's 'select':

select()'s argument
	http://sourceforge.net/p/mingw-w64/mailman/message/29610438/

... and libiberty's timeval-utils.h timeval_add/timeval_sub, at the
least.

We don't really need the POSIX compliance, so this patch prepares us
to simply not use gnulib's 'struct timeval' replacement once a more
recent gnulib is imported, thus preserving the current behavior, by
adding a sys/time.h wrapper header that undefs gnulib's replacements,
and including that everywhere instead.

The SIZE -> OSIZE change is necessary because newer gnulib's
sys/time.h also includes windows.h/winsock2.h, which defines a
conflicting SIZE symbol.

Cross build-tested mingw-w64 32-bit and 64-bit.
Regtested on x86_64 Fedora 20.

gdb/ChangeLog:
2015-08-24  Pedro Alves  <palves@redhat.com>

	* Makefile.in (HFILES_NO_SRCDIR): Add common/gdb_sys_time.h.
	* common/gdb_sys_time.h: New file.
	* event-loop.c: Include gdb_sys_time.h instead of sys/time.h.
	* gdb_select.h: Likewise.
	* gdb_usleep.c: Likewise.
	* maint.c: Likewise.
	* mi/mi-main.c: Likewise.
	* mi/mi-parse.h: Likewise.
	* remote-fileio.c: Likewise.
	* remote-m32r-sdi.c: Likewise.
	* remote.c: Likewise.
	* ser-base.c: Likewise.
	* ser-pipe.c: Likewise.
	* ser-tcp.c: Likewise.
	* ser-unix.c: Likewise.
	* symfile.c: Likewise.
	* symfile.c: Likewise.  Rename OSIZE to SIZE throughout.
	* target-memory.c: Include gdb_sys_time.h instead of sys/time.h.
	* utils.c: Likewise.

gdb/gdbserver/ChangeLog:
2015-08-24  Pedro Alves  <palves@redhat.com>

	* debug.c: Include gdb_sys_time.h instead of sys/time.h.
	* event-loop.c: Likewise.
	* remote-utils.c: Likewise.
	* tracepoint.c: Likewise.

24 files changed, 94 insertions, 28 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ee9783a..02d1b15 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,27 @@
 2015-08-24  Pedro Alves  <palves@redhat.com>
 
+	* Makefile.in (HFILES_NO_SRCDIR): Add common/gdb_sys_time.h.
+	* common/gdb_sys_time.h: New file.
+	* event-loop.c: Include gdb_sys_time.h instead of sys/time.h.
+	* gdb_select.h: Likewise.
+	* gdb_usleep.c: Likewise.
+	* maint.c: Likewise.
+	* mi/mi-main.c: Likewise.
+	* mi/mi-parse.h: Likewise.
+	* remote-fileio.c: Likewise.
+	* remote-m32r-sdi.c: Likewise.
+	* remote.c: Likewise.
+	* ser-base.c: Likewise.
+	* ser-pipe.c: Likewise.
+	* ser-tcp.c: Likewise.
+	* ser-unix.c: Likewise.
+	* symfile.c: Likewise.
+	* symfile.c: Likewise.  Rename OSIZE to SIZE throughout.
+	* target-memory.c: Include gdb_sys_time.h instead of sys/time.h.
+	* utils.c: Likewise.
+
+2015-08-24  Pedro Alves  <palves@redhat.com>
+
 	* NEWS: Mention removed support for the various ROM monitors.
 	* Makefile.in (ALL_TARGET_OBS): Remove dbug-rom.o, dink32-rom.o,
 	ppcbug-rom.o, m32r-rom.o, dsrec.o and monitor.o from gdb_target_obs.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 398ef6a..924979b 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -986,7 +986,7 @@ common/common-debug.h common/cleanups.h common/gdb_setjmp.h \
 common/common-exceptions.h target/target.h common/symbol.h \
 common/common-regcache.h fbsd-tdep.h nat/linux-personality.h \
 common/fileio.h nat/x86-linux.h nat/x86-linux-dregs.h \
-nat/linux-namespaces.h arch/arm.h
+nat/linux-namespaces.h arch/arm.h common/gdb_sys_time.h
 
 # Header files that already have srcdir in them, or which are in objdir.
 
diff --git a/gdb/common/gdb_sys_time.h b/gdb/common/gdb_sys_time.h
new file mode 100644
index 0000000..0f764f8
--- /dev/null
+++ b/gdb/common/gdb_sys_time.h
@@ -0,0 +1,38 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDB_SYS_TIME_H
+#define GDB_SYS_TIME_H
+
+#include <sys/time.h>
+
+/* On MinGW-w64, gnulib's sys/time.h replaces 'struct timeval' and
+   gettimeofday with versions that support 64-bit time_t, for POSIX
+   compliance.  However, the gettimeofday replacement does not ever
+   return time_t values larger than 31-bit, as it simply returns the
+   system's gettimeofday's (signed) 32-bit result as (signed) 64-bit.
+   Because we don't really need the POSIX compliance, and it ends up
+   causing conflicts with other libraries we use that don't use gnulib
+   and thus work with the native struct timeval, such as Winsock2's
+   native 'select' and libiberty, simply undefine away gnulib's
+   replacements.  */
+#if GNULIB_defined_struct_timeval
+# undef timeval
+# undef gettimeofday
+#endif
+
+#endif /* #ifndef GDB_SYS_TIME_H */
diff --git a/gdb/event-loop.c b/gdb/event-loop.c
index 9ac4908..df569be 100644
--- a/gdb/event-loop.c
+++ b/gdb/event-loop.c
@@ -31,7 +31,7 @@
 #endif
 
 #include <sys/types.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include "gdb_select.h"
 #include "observer.h"
 
diff --git a/gdb/gdb_select.h b/gdb/gdb_select.h
index b608f2a..9748a13 100644
--- a/gdb/gdb_select.h
+++ b/gdb/gdb_select.h
@@ -23,7 +23,7 @@
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #else
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #endif
 
 #ifdef USE_WIN32API
diff --git a/gdb/gdb_usleep.c b/gdb/gdb_usleep.c
index 22ee6a0..67e4396 100644
--- a/gdb/gdb_usleep.c
+++ b/gdb/gdb_usleep.c
@@ -18,8 +18,7 @@
 #include "defs.h"
 #include "gdb_usleep.h"
 #include "gdb_select.h"
-
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 int
 gdb_usleep (int usec)
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 12d8bb3..017fd5d 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,5 +1,12 @@
 2015-08-24  Pedro Alves  <palves@redhat.com>
 
+	* debug.c: Include gdb_sys_time.h instead of sys/time.h.
+	* event-loop.c: Likewise.
+	* remote-utils.c: Likewise.
+	* tracepoint.c: Likewise.
+
+2015-08-24  Pedro Alves  <palves@redhat.com>
+
 	* spu-low.c (spu_request_interrupt): Use lwpid_of instead of
 	ptid_get_lwp.
 
diff --git a/gdb/gdbserver/debug.c b/gdb/gdbserver/debug.c
index 1a1e333..5bbd381 100644
--- a/gdb/gdbserver/debug.c
+++ b/gdb/gdbserver/debug.c
@@ -17,7 +17,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "server.h"
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 /* Enable miscellaneous debugging output.  The name is historical - it
    was originally used to debug LinuxThreads support.  */
diff --git a/gdb/gdbserver/event-loop.c b/gdb/gdbserver/event-loop.c
index d1825ae..d27bc94 100644
--- a/gdb/gdbserver/event-loop.c
+++ b/gdb/gdbserver/event-loop.c
@@ -22,7 +22,7 @@
 #include "queue.h"
 
 #include <sys/types.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #ifdef USE_WIN32API
 #include <windows.h>
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index 05563be..586ced8 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -51,7 +51,7 @@
 #if HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <unistd.h>
 #if HAVE_ARPA_INET_H
 #include <arpa/inet.h>
diff --git a/gdb/gdbserver/tracepoint.c b/gdb/gdbserver/tracepoint.c
index 4455084..5d0ed73 100644
--- a/gdb/gdbserver/tracepoint.c
+++ b/gdb/gdbserver/tracepoint.c
@@ -25,7 +25,7 @@
 #include <ctype.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <inttypes.h>
 #include "ax.h"
 #include "tdesc.h"
diff --git a/gdb/maint.c b/gdb/maint.c
index 1adea2f..5d7fca5 100644
--- a/gdb/maint.c
+++ b/gdb/maint.c
@@ -24,7 +24,7 @@
 #include "arch-utils.h"
 #include <ctype.h>
 #include <signal.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <time.h>
 #include "command.h"
 #include "gdbcmd.h"
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index b2513a1..3fa1bd6 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -55,7 +55,7 @@
 #include "gdbcmd.h"
 
 #include <ctype.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #if defined HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
diff --git a/gdb/mi/mi-parse.h b/gdb/mi/mi-parse.h
index 4c10f92..5900a6f 100644
--- a/gdb/mi/mi-parse.h
+++ b/gdb/mi/mi-parse.h
@@ -20,7 +20,7 @@
 #ifndef MI_PARSE_H
 #define MI_PARSE_H
 
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 /* MI parser */
 
diff --git a/gdb/remote-fileio.c b/gdb/remote-fileio.c
index a33acf9..6569822 100644
--- a/gdb/remote-fileio.c
+++ b/gdb/remote-fileio.c
@@ -31,7 +31,7 @@
 #include "filestuff.h"
 
 #include <fcntl.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #ifdef __CYGWIN__
 #include <sys/cygwin.h>		/* For cygwin_conv_path.  */
 #endif
diff --git a/gdb/remote-m32r-sdi.c b/gdb/remote-m32r-sdi.c
index 119bb6e..bb07e4e 100644
--- a/gdb/remote-m32r-sdi.c
+++ b/gdb/remote-m32r-sdi.c
@@ -36,7 +36,7 @@
 #include <netinet/in.h>
 #endif
 #include <sys/types.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <time.h>
 #include "gdb_bfd.h"
 #include "cli/cli-utils.h"
diff --git a/gdb/remote.c b/gdb/remote.c
index 12294bc..48a4f7d 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -47,7 +47,7 @@
 #include "disasm.h"
 #include "location.h"
 
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #include "event-loop.h"
 #include "event-top.h"
diff --git a/gdb/ser-base.c b/gdb/ser-base.c
index 09aacec..2f12125 100644
--- a/gdb/ser-base.c
+++ b/gdb/ser-base.c
@@ -23,7 +23,7 @@
 #include "event-loop.h"
 
 #include "gdb_select.h"
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #ifdef USE_WIN32API
 #include <winsock2.h>
 #endif
diff --git a/gdb/ser-pipe.c b/gdb/ser-pipe.c
index 0700132..1e777b7 100644
--- a/gdb/ser-pipe.c
+++ b/gdb/ser-pipe.c
@@ -27,7 +27,7 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <fcntl.h>
 #include "filestuff.h"
 
diff --git a/gdb/ser-tcp.c b/gdb/ser-tcp.c
index 35512e6..485ed6c 100644
--- a/gdb/ser-tcp.c
+++ b/gdb/ser-tcp.c
@@ -35,7 +35,7 @@
 #include <sys/ioctl.h>  /* For FIONBIO.  */
 #endif
 
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #ifdef USE_WIN32API
 #include <winsock2.h>
diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
index 356e5e7..f2d9ca6 100644
--- a/gdb/ser-unix.c
+++ b/gdb/ser-unix.c
@@ -26,7 +26,7 @@
 #include <sys/types.h>
 #include "terminal.h"
 #include <sys/socket.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #include "gdb_select.h"
 #include "gdbcmd.h"
diff --git a/gdb/symfile.c b/gdb/symfile.c
index 856572a..0b57c28 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -62,7 +62,7 @@
 #include <sys/stat.h>
 #include <ctype.h>
 #include <time.h>
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 #include "psymtab.h"
 
@@ -3518,12 +3518,12 @@ overlay_command (char *args, int from_tty)
    In this simple implementation, the target data structures are as follows:
    unsigned _novlys;            /# number of overlay sections #/
    unsigned _ovly_table[_novlys][4] = {
-   {VMA, SIZE, LMA, MAPPED},    /# one entry per overlay section #/
+   {VMA, OSIZE, LMA, MAPPED},    /# one entry per overlay section #/
    {..., ...,  ..., ...},
    }
    unsigned _novly_regions;     /# number of overlay regions #/
    unsigned _ovly_region_table[_novly_regions][3] = {
-   {VMA, SIZE, MAPPED_TO_LMA},  /# one entry per overlay region #/
+   {VMA, OSIZE, MAPPED_TO_LMA},  /# one entry per overlay region #/
    {..., ...,  ...},
    }
    These functions will attempt to update GDB's mappedness state in the
@@ -3541,7 +3541,7 @@ static unsigned cache_novlys = 0;
 static CORE_ADDR cache_ovly_table_base = 0;
 enum ovly_index
   {
-    VMA, SIZE, LMA, MAPPED
+    VMA, OSIZE, LMA, MAPPED
   };
 
 /* Throw away the cached copy of _ovly_table.  */
@@ -3641,14 +3641,14 @@ simple_overlay_update_1 (struct obj_section *osect)
   for (i = 0; i < cache_novlys; i++)
     if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
 	&& cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
-	/* && cache_ovly_table[i][SIZE] == size */ )
+	/* && cache_ovly_table[i][OSIZE] == size */ )
       {
 	read_target_long_array (cache_ovly_table_base + i * word_size,
 				(unsigned int *) cache_ovly_table[i],
 				4, word_size, byte_order);
 	if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
 	    && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
-	    /* && cache_ovly_table[i][SIZE] == size */ )
+	    /* && cache_ovly_table[i][OSIZE] == size */ )
 	  {
 	    osect->ovly_mapped = cache_ovly_table[i][MAPPED];
 	    return 1;
@@ -3714,7 +3714,7 @@ simple_overlay_update (struct obj_section *osect)
       for (i = 0; i < cache_novlys; i++)
 	if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
 	    && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
-	    /* && cache_ovly_table[i][SIZE] == size */ )
+	    /* && cache_ovly_table[i][OSIZE] == size */ )
 	  { /* obj_section matches i'th entry in ovly_table.  */
 	    osect->ovly_mapped = cache_ovly_table[i][MAPPED];
 	    break;		/* finished with inner for loop: break out.  */
diff --git a/gdb/target-memory.c b/gdb/target-memory.c
index 5e5b1d7..177deb6 100644
--- a/gdb/target-memory.c
+++ b/gdb/target-memory.c
@@ -23,7 +23,7 @@
 #include "target.h"
 #include "memory-map.h"
 
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 
 static int
 compare_block_starting_address (const void *a, const void *b)
diff --git a/gdb/utils.c b/gdb/utils.c
index e5ad195..a3c7076 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -62,7 +62,7 @@
 
 #include "readline/readline.h"
 
-#include <sys/time.h>
+#include "gdb_sys_time.h"
 #include <time.h>
 
 #include "gdb_usleep.h"