-# fseeko.m4 serial 7
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# fseeko.m4 serial 16
+dnl Copyright (C) 2007-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_FSEEKO],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
- AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gl_STDIN_LARGE_OFFSET])
+ AC_REQUIRE([gl_SYS_TYPES_H])
+ AC_REQUIRE([AC_PROG_CC])
dnl Persuade glibc <stdio.h> to declare fseeko().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
]], [fseeko (stdin, 0, 0);])],
[gl_cv_func_fseeko=yes], [gl_cv_func_fseeko=no])
])
- if test $gl_cv_func_fseeko = no \
- || test $gl_cv_var_stdin_large_offset = no; then
- gl_REPLACE_FSEEKO
+
+ AC_CHECK_DECLS_ONCE([fseeko])
+ if test $ac_cv_have_decl_fseeko = no; then
+ HAVE_DECL_FSEEKO=0
fi
+
+ if test $gl_cv_func_fseeko = no; then
+ HAVE_FSEEKO=0
+ else
+ if test $WINDOWS_64_BIT_OFF_T = 1; then
+ REPLACE_FSEEKO=1
+ fi
+ if test $gl_cv_var_stdin_large_offset = no; then
+ REPLACE_FSEEKO=1
+ fi
+ m4_ifdef([gl_FUNC_FFLUSH_STDIN], [
+ gl_FUNC_FFLUSH_STDIN
+ if test $gl_cv_func_fflush_stdin = no; then
+ REPLACE_FSEEKO=1
+ fi
+ ])
+ fi
+])
+
+dnl Code shared by fseeko and ftello. Determine if large files are supported,
+dnl but stdin does not start as a large file by default.
+AC_DEFUN([gl_STDIN_LARGE_OFFSET],
+ [
+ AC_CACHE_CHECK([whether stdin defaults to large file offsets],
+ [gl_cv_var_stdin_large_offset],
+ [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]],
+[[#if defined __SL64 && defined __SCLE /* cygwin */
+ /* Cygwin 1.5.24 and earlier fail to put stdin in 64-bit mode, making
+ fseeko/ftello needlessly fail. This bug was fixed in 1.5.25, and
+ it is easier to do a version check than building a runtime test. */
+# include <cygwin/version.h>
+# if CYGWIN_VERSION_DLL_COMBINED < CYGWIN_VERSION_DLL_MAKE_COMBINED (1005, 25)
+ choke me
+# endif
+#endif]])],
+ [gl_cv_var_stdin_large_offset=yes],
+ [gl_cv_var_stdin_large_offset=no])])
])
-AC_DEFUN([gl_REPLACE_FSEEKO],
+# Prerequisites of lib/fseeko.c.
+AC_DEFUN([gl_PREREQ_FSEEKO],
[
- AC_LIBOBJ([fseeko])
- AC_REQUIRE([gl_STDIO_H_DEFAULTS])
- REPLACE_FSEEKO=1
- dnl If we are also using the fseek module, then fseek needs replacing, too.
- m4_ifdef([gl_REPLACE_FSEEK], [gl_REPLACE_FSEEK])
+ dnl Native Windows has the function _fseeki64. mingw hides it, but mingw64
+ dnl makes it usable again.
+ AC_CHECK_FUNCS([_fseeki64])
])