X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fftruncate.m4;h=ec593a96de068eda24748dc44e8e868b3ee65547;hb=2220ef77b370b8a55591463e49d2789464f38aa5;hp=0397a000c2317fad1f92f38557f96486416df28f;hpb=ee76465ad82c04707c78ff3ed723358217c9e34f;p=gnulib.git

diff --git a/m4/ftruncate.m4 b/m4/ftruncate.m4
index 0397a000c..ec593a96d 100644
--- a/m4/ftruncate.m4
+++ b/m4/ftruncate.m4
@@ -1,14 +1,18 @@
-#serial 4
+#serial 5
 
 # See if we need to emulate a missing ftruncate function using fcntl or chsize.
 
 AC_DEFUN([jm_FUNC_FTRUNCATE],
 [
-  AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])
-
-  if test "$ftruncate_missing" = yes; then
-    AC_CHECK_HEADERS([unistd.h])
-    AC_CHECK_FUNCS([chsize])
-    AC_LIBOBJ(ftruncate)
+  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)
+])