Allow recent Perl versions, and keep CFLAGS/LDFLAGS

--- configure.orig	1998-08-02 13:48:40 UTC
+++ configure
@@ -571,7 +571,7 @@ if test "${with_perl+set}" = set; then
 if test "${with_perl+set}" = set; then
   withval="$with_perl"
   perlprog=$with_perl
-perlvers=`$perlprog -v | grep version | sed -e 's/.* version //' -e 's/ built.*//' -e 's/ with.*//'`
+perlvers=`$perlprog -e 'print $]'`
 
 else
   TMPFILE=/tmp/x.$$
@@ -600,19 +600,6 @@ case $perlvers in
 PATH_PERL=$perlprog
 echo "$ac_t""$perlprog v$perlvers" 1>&6
 case $perlvers in
-    5.003* | 5.004* | 5.005* | 5.006* )
-        ;;
-    * ) echo ""
-        echo "Latest Perl found on your system is $perlvers,"
-        echo "but at least Perl version 5.003 is required."
-        echo "In case the newer one is not in PATH, just use"
-        echo "the option --with-perl=/path/to/bin/perl to"
-        echo "provide the correct executable."
-        echo ""
-        { echo "configure: error: Perl version too old" 1>&2; exit 1; } 
-        ;;
-esac
-case $perlvers in
     5.00[3-6]_[0-9][0-9] ) 
 	    perlvnum=`echo $perlvers | sed -e 's/\.//' -e 's/_//'` ;; 
     5.00[3-6] ) 
@@ -901,7 +888,6 @@ if test $ac_cv_prog_gcc = yes; then
   GCC=yes
   ac_test_CFLAGS="${CFLAGS+set}"
   ac_save_CFLAGS="$CFLAGS"
-  CFLAGS=
   echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
 echo "configure:907: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
@@ -918,16 +904,17 @@ echo "$ac_t""$ac_cv_prog_cc_g" 1>&6
 fi
 
 echo "$ac_t""$ac_cv_prog_cc_g" 1>&6
+ if false; then
   if test "$ac_test_CFLAGS" = set; then
     CFLAGS="$ac_save_CFLAGS"
   elif test $ac_cv_prog_cc_g = yes; then
-    CFLAGS="-g -O2"
+    CFLAGS="$CFLAGS -g -O2"
   else
-    CFLAGS="-O2"
+    CFLAGS="$CFLAGS -O2"
   fi
+ fi
 else
   GCC=
-  test "${CFLAGS+set}" = set || CFLAGS="-g"
 fi
 
 # Extract the first word of "ranlib", so it can be a program name with args.
@@ -1025,11 +1012,8 @@ if test "${enable_debug+set}" = set; then
 if test "${enable_debug+set}" = set; then
   enableval="$enable_debug"
   if test ".$ac_cv_prog_gcc" = ".yes"; then
-    CFLAGS="-Wall -g -ggdb3"
+    CFLAGS="$CFLAGS -Wall -g -ggdb3"
     LDFLAGS="-g -ggdb3"
-else
-    CFLAGS="-g"
-    LDFLAGS="-g"
 fi
 x="enabled"
 debug=on
@@ -1039,8 +1023,6 @@ else
 
 
 else
-  CFLAGS=""
-LDFLAGS=""
 x=disabled
 debug=off