-#serial 1
+#serial 6
-# See if we need to emulate a missing ftruncate function using fcntl.
+# See if we need to emulate a missing ftruncate function using fcntl or chsize.
-AC_DEFUN(jm_FUNC_FTRUNCATE,
+AC_DEFUN([gl_FUNC_FTRUNCATE],
[
- AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])
-
- 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 $fu_cv_sys_ftruncate_emulation = yes; then
- LIBOBJS="$LIBOBJS ftruncate.$ac_objext"
- fi
+ AC_REPLACE_FUNCS(ftruncate)
+ if test $ac_cv_func_ftruncate = no; then
+ gl_PREREQ_FTRUNCATE
fi
])
+
+# Prerequisites of lib/ftruncate.c.
+AC_DEFUN([gl_PREREQ_FTRUNCATE],
+[
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+ AC_CHECK_FUNCS(chsize)
+])