Add a cache check with which users who cross-compile APR

can influence the outcome of the /dev/zero test by setting the variable
ac_cv_mmap__dev_zero=yes


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1875062 13f79535-47bb-0310-9956-ffa450edef68

CHANGES

@@ -1,6 +1,10 @@
                                                      -*- coding: utf-8 -*-
 Changes for APR 2.0.0
 
+  *) Add a cache check with which users who cross-compile APR
+     can influence the outcome of the /dev/zero test by setting the variable
+     ac_cv_mmap__dev_zero=yes [Sebastian Kemper <sebastian_ml gmx net>]
+
   *) apr_crypto_commoncrypto: Remove stray reference to -lcrypto that
      prevented commoncrypto being enabled. [Graham Leggett]
 

configure.in

@@ -1092,10 +1092,10 @@ AC_CHECK_FILE(/dev/zero)
 
 # Not all systems can mmap /dev/zero (such as HP-UX).  Check for that.
 if test "$ac_cv_func_mmap" = "yes" &&
-   test "$ac_cv_file__dev_zero" = "yes"; then
-    AC_MSG_CHECKING(for mmap that can map /dev/zero)
-    AC_TRY_RUN([
-#include <sys/types.h>
+  test "$ac_cv_file__dev_zero" = "yes"; then
+    AC_CACHE_CHECK([for mmap that can map /dev/zero],
+    [ac_cv_mmap__dev_zero],
+    [AC_TRY_RUN([#include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #ifdef HAVE_SYS_MMAN_H
@@ -1117,9 +1117,7 @@ if test "$ac_cv_func_mmap" = "yes" &&
             return 3;
         }
         return 0;
-    }], [], [ac_cv_file__dev_zero=no], [ac_cv_file__dev_zero=no])
-
-    AC_MSG_RESULT($ac_cv_file__dev_zero)
+    }], [], [ac_cv_file__dev_zero=no], [ac_cv_file__dev_zero=no])])
 fi
 
 # Now we determine which one is our anonymous shmem preference.