5-gary-FEATURE_TEST_LENGTH-max.patch

[Gary V. Vaughan]

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Okay to commit?
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Gary V. Vaughan      ())_.  address@hidden,gnu.org}
Research Scientist   ( '/   http://tkd.kicks-ass.net
GNU Hacker           / )=   http://www.gnu.org/software/libtool
Technical Author   `(_~)_   http://sources.redhat.com/autobook
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Index: ChangeLog
from  Gary V. Vaughan  <address@hidden>

        * lib/autoconf/programs.m4 (_AC_FEATURE_CHECK_LENGTH): Make the
        best tool so far counter rely on the tool path variable name to
        avoid checks for one tool being affected by the results of running
        the length check on a previous tool.

Index: lib/autoconf/programs.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/programs.m4,v
retrieving revision 1.23
diff -u -p -u -r1.23 programs.m4
--- lib/autoconf/programs.m4 20 Apr 2004 16:54:35 -0000 1.23
+++ lib/autoconf/programs.m4 20 Apr 2004 17:21:17 -0000
@@ -467,12 +467,15 @@ m4_define([_AC_FEATURE_CHECK_LENGTH],
     cp "$tmp/conftest.in" "$tmp/conftest.nl"
     echo '$4' >> "$tmp/conftest.nl"
     $3 < "$tmp/conftest.nl" >"$tmp/conftest.out" || break
-   diff "$tmp/conftest.out" "$tmp/conftest.nl" >/dev/null 2>&1 || break
+    diff "$tmp/conftest.out" "$tmp/conftest.nl" >/dev/null 2>&1 || break
     ac_count=`expr $ac_count + 1`
-    if test $ac_count -gt ${ac_max-0}; then
+    if test $ac_count -gt ${$1_max-0}; then
       # Best one so far, save it but keep looking for a better one
       $2="$$1"
-      ac_max=$ac_count
+      dnl Using $1_max so that each tool feature checked gets its
+      dnl own variable.  Don't reset it otherwise the implied search
+      dnl for best performing tool in a list breaks down.
+      $1_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break