-#serial 2
+# serial 18
-# See if we need to emulate a missing ftruncate function using fcntl.
+# See if we need to emulate a missing ftruncate function using chsize.
-AC_DEFUN(jm_FUNC_FTRUNCATE,
-[
- AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])
+# Copyright (C) 2000-2001, 2003-2007, 2009-2012 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
- if test "$ftruncate_missing" = yes; then
- AC_CHECK_HEADERS(unistd.h)
- AC_MSG_CHECKING([fcntl emulation of ftruncate])
- AC_CACHE_VAL(fu_cv_sys_ftruncate_emulation,
- [AC_TRY_LINK([
-#include <sys/types.h>
-#include <fcntl.h>], [
-#if !defined(F_CHSIZE) && !defined(F_FREESP)
- chsize();
-#endif
- ],
- fu_cv_sys_ftruncate_emulation=yes,
- fu_cv_sys_ftruncate_emulation=no)])
- AC_MSG_RESULT($fu_cv_sys_ftruncate_emulation)
- if test $fu_cv_sys_ftruncate_emulation = yes; then
- AC_LIBOBJ(ftruncate)
- fi
+AC_DEFUN([gl_FUNC_FTRUNCATE],
+[
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ AC_CHECK_FUNCS_ONCE([ftruncate])
+ if test $ac_cv_func_ftruncate = no; then
+ HAVE_FTRUNCATE=0
fi
])
+
+# Prerequisites of lib/ftruncate.c.
+AC_DEFUN([gl_PREREQ_FTRUNCATE],
+[
+ AC_REQUIRE([AC_C_INLINE])
+ AC_CHECK_FUNCS([chsize])
+])