merges r31262 and r31264 from trunk into ruby_1_9_2.

--
Evaluate truncate, ftruncate and ftello existence

This corrects mingw-w64 compilation.
--
* include/ruby/win32.h: VC doesn't have ftruncate() and others, but
  ruby needs HAVE_ macros to use our emulation functions.
  (fix the problem of 31262)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@31798 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,17 @@
+Tue Apr 12 10:37:39 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* include/ruby/win32.h: VC doesn't have ftruncate() and others, but
+	  ruby needs HAVE_ macros to use our emulation functions.
+	  (fix the problem of 31262)
+
+Tue Apr 12 01:33:00 2011  Luis Lavena  <luislavena@gmail.com>
+
+	* configure.in: properly evaluate existence of truncate, ftruncate
+	  and ftello for MinGW. [ruby-core:35678]
+	* win32/win32.c: rename truncate, ftruncate and ftello to avoid 
+	  redefinitions.
+	* win32/win32.h: ditto.
+
 Fri Apr  8 16:01:56 2011  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* ext/stringio/stringio.c (strio_getline): check whether str is

configure.in

@@ -938,9 +938,7 @@ main()
 		ac_cv_func_isnan=yes
 		ac_cv_func_finite=yes
 		ac_cv_func_link=yes
-		ac_cv_func_truncate=yes
 		ac_cv_func_fseeko=yes
-		ac_cv_func_ftello=yes
 		ac_cv_lib_crypt_crypt=no
 		ac_cv_func_getpgrp_void=no
 		ac_cv_func_setpgrp_void=yes
@@ -1187,7 +1185,7 @@ else
   AC_LIBOBJ([signbit])
 fi
 AC_CHECK_FUNCS(fmod killpg wait4 waitpid fork spawnv syscall __syscall chroot getcwd eaccess\
-	      truncate ftruncate chsize times utimes utimensat fcntl lockf lstat\
+	      truncate ftruncate ftello chsize times utimes utimensat fcntl lockf lstat\
 	      link symlink readlink readdir_r fsync fdatasync fchown\
 	      setitimer setruid seteuid setreuid setresuid setproctitle socketpair\
 	      setrgid setegid setregid setresgid issetugid pause lchown lchmod\

include/ruby/win32.h

@@ -370,11 +370,23 @@ scalb(double a, long b)
 //
 
 #define SUFFIX
+
+#if !defined HAVE_FTRUNCATE || defined(_MSC_VER)
 #define ftruncate rb_w32_ftruncate
-extern int       truncate(const char *path, off_t length);
+extern int       rb_w32_ftruncate(int fd, off_t length);
-extern int       ftruncate(int fd, off_t length);
+#endif
+
+#if !defined HAVE_TRUNCATE || defined(_MSC_VER)
+#define truncate rb_w32_truncate
+extern int       rb_w32_truncate(const char *path, off_t length);
+#endif
+
 extern int       fseeko(FILE *stream, off_t offset, int whence);
-extern off_t     ftello(FILE *stream);
+
+#if !defined HAVE_FTELLO || defined(_MSC_VER)
+#define ftello rb_w32_ftello
+extern off_t     rb_w32_ftello(FILE *stream);
+#endif
 
 //
 // stubs

version.h

@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_PATCHLEVEL 225
+#define RUBY_PATCHLEVEL 226
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1

win32/win32.c

@@ -4332,7 +4332,7 @@ rb_chsize(HANDLE h, off_t size)
 }
 
 int
-truncate(const char *path, off_t length)
+rb_w32_truncate(const char *path, off_t length)
 {
     HANDLE h;
     int ret;
@@ -4358,7 +4358,7 @@ truncate(const char *path, off_t length)
 }
 
 int
-ftruncate(int fd, off_t length)
+rb_w32_ftruncate(int fd, off_t length)
 {
     HANDLE h;
 
@@ -4431,7 +4431,7 @@ fseeko(FILE *stream, off_t offset, int whence)
 }
 
 off_t
-ftello(FILE *stream)
+rb_w32_ftello(FILE *stream)
 {
     off_t pos;
     if (fgetpos(stream, (fpos_t *)&pos)) return (off_t)-1;