Re: [PATCH-1.5] BSD sysctl command line length

[Peter O'Gorman]

Peter O'Gorman wrote:

> Hi,
> I'd like to move this back to branch-1-5.
>
> Okay to commit?

Forgot to attach the patch. Doh!

Peter
--
Peter O'Gorman - http://www.pogma.com

Index: ChangeLog
from  Todd Vierling  <address@hidden>,
        Peter O'Gorman  <address@hidden>

        * libtool.m4 (AC_LIBTOOL_SYS_MAX_CMD_LEN): Use sysctl to get the
        max cmd length on BSD* and darwin. Make sure that there is a safety
        factor too.

Index: libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/Attic/libtool.m4,v
retrieving revision 1.314.2.44
diff -u -3 -p -u -r1.314.2.44 libtool.m4
--- libtool.m4 2 Aug 2004 04:03:26 -0000 1.314.2.44
+++ libtool.m4 2 Aug 2004 13:35:29 -0000
@@ -678,6 +678,19 @@ AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [d
     lt_cv_sys_max_cmd_len=8192;
     ;;
 
+  netbsd* | freebsd* | openbsd* | darwin* )
+    # This has been around since 386BSD, at least.  Likely further.
+    if test -x /sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
+    elif test -x /usr/sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
+    else
+      lt_cv_sys_max_cmd_len=65536 # usable default for *BSD
+    fi
+    # And add a safety zone
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+    ;;
+
  *)
     # If test is not a shell built-in, we'll probably end up computing a
     # maximum length that is only half of the actual maximum length, but