diff options
Diffstat (limited to 'm4/ftruncate.m4')
| -rw-r--r-- | m4/ftruncate.m4 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/m4/ftruncate.m4 b/m4/ftruncate.m4 new file mode 100644 index 0000000..b7f346a --- /dev/null +++ b/m4/ftruncate.m4 @@ -0,0 +1,46 @@ +#serial 13 + +# See if we need to emulate a missing ftruncate function using fcntl or chsize. + +# Copyright (C) 2000, 2001, 2003-2007 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. + +# FIXME: remove this macro, along with all uses of HAVE_FTRUNCATE in 2010, +# if the check below provokes no more reports. So far, the only report +# arose from a test build of this gnulib module, cross-compiling to mingw: +# <http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/9203> + +AC_DEFUN([gl_FUNC_FTRUNCATE], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) + AC_CHECK_FUNCS_ONCE([ftruncate]) + if test $ac_cv_func_ftruncate = no; then + HAVE_FTRUNCATE=0 + AC_LIBOBJ([ftruncate]) + gl_PREREQ_FTRUNCATE + case "$host_os" in + mingw*) + # Yes, we know mingw lacks ftruncate. + ;; + *) + # If someone lacks ftruncate, make configure fail, and request + # a bug report to inform us about it. + if test x"$SKIP_FTRUNCATE_CHECK" != xyes; then + AC_MSG_FAILURE([Your system lacks the ftruncate function. + Please report this, along with the output of "uname -a", to the + bug-coreutils@gnu.org mailing list. To continue past this point, + rerun configure with SKIP_FTRUNCATE_CHECK=yes. + E.g., ./configure SKIP_FTRUNCATE_CHECK=yes]) + fi + esac + fi +]) + +# Prerequisites of lib/ftruncate.c. +AC_DEFUN([gl_PREREQ_FTRUNCATE], +[ + AC_CHECK_FUNCS(chsize) +]) |