Patch from Ralf Corsepius <corsepiu@faw.uni-ulm.de>:

   1. Rtems contains some perl scripts that use hard-coded paths to
      /usr/bin/perl or /usr/local/bin/perl I have already fixed these
      problems by adding some checks to configure.in.   While doing this,
      I also cleaned up some more autoconf related problems for generating
      shell scripts.  This patch might seem a bit scary to you, but I am
      quite confident it won't break something (I've been testing it for
      almost a week now, however it might introduce typos for a limited
      number configurations I don't have access to - But it shouldn't be
      a problem for you to test them :-).

   I expect to get this finished tonight, hence you will very likely
   have the patch when you get up tomorrow.

   Changes:

   * Check for PERL and disable all PERL scripts if perl wasn't found.
   * Generate all KSHELL-scripts with autoconf instead of make-script
   * Automatic dependency handling for autoconf generated KSHELL or PERL
     scripts (make/rtems.cfg)

   Notes:
   * this patch contains new files and deletes some other files.
   * The patch is relative to rtems-4.0.0-beta4 with my previous
     rtems-rc-981014-1.diff patch applied.

   Testing:
      I tested it with sh-rtems and posix under linux. Now all targets
      which are touched by this patch and which are not used while building
      for sh-rtems and posix still need to be tested. AFAIS, only the
      sparc/erc32 BSP should be affected by this criterion. And if you
      like to, you should also consider testing it on a Cygwin32 and a
      Solaris host for one arbitrary BSP.

1 files changed, 142 insertions, 0 deletions

diff --git a/c/build-tools/install-if-change.in b/c/build-tools/install-if-change.in
new file mode 100644
index 0000000000..b2f3cb04bb
--- /dev/null
+++ b/c/build-tools/install-if-change.in
@@ -0,0 +1,142 @@
+#!@KSH@ -p
+#
+# Either bash or ksh will be ok for this; requires (( )) arithmetic
+#  (-p above just says to not parse $ENV file; makes it faster for
+#   those of us who set $ENV)
+#
+# install files if they have changed by running 'cmp', then 'install'
+#   as necessary.
+#
+#  Optionally, can append a suffix before last existing suffix (if any)
+#
+# NOTE
+#   We avoid using typical install(1M) programs since they have
+#   large variability across systems and we also need to support ou
+#   -V option.
+#   So we just copy and chmod by hand.
+#
+# $Id$
+#
+
+progname=`basename $0`
+#progname=${0##*/}        # fast basename hack for ksh, bash
+
+USAGE=\
+"usage: $progname [ -vmV ] file [ file ... ] dest-directory-or-file
+	-v	    -- verbose
+        -V suffix   -- suffix to append to targets (before any . suffix)
+                        eg: -V _g would change 'foo' to 'foo_g' and
+                                               'libfoo.a' to 'libfoo_g.a'
+        -m mode     -- mode for new file(s)"
+
+fatal() {
+    if [ "$1" ]
+    then
+        echo $* >&2
+    fi
+    echo "$USAGE" 1>&2
+    exit 1
+}
+
+#
+# process the options
+#
+
+verbose=""
+suffix=""
+mode=""
+
+while getopts vm:V: OPT
+do
+    case "$OPT" in
+	v)
+	    verbose="yes";;
+        V)
+            eval suffix=$OPTARG;;
+        m)
+            mode="$OPTARG";;
+        *)
+            fatal
+    esac
+done
+
+shiftcount=`expr $OPTIND - 1`
+shift $shiftcount
+
+args=$*
+
+#
+# Separate source file(s) from dest directory or file
+#
+
+files=""
+dest=""
+for d in $args
+do
+    files="$files $dest"
+    dest=$d
+done
+
+if [ ! "$files" ] || [ ! "$dest" ]
+then
+    fatal "missing files or invalid destination"
+fi
+
+#
+# Process the arguments
+#
+
+targets=""
+for f in $files
+do
+    # leaf=`basename $f`
+    leaf=${f##*/}        # fast basename hack for ksh, bash
+
+    target=$dest
+    if [ -d $dest ]
+    then
+        # if we were given a suffix, then add it as appropriate
+        if [ "$suffix" ]
+        then
+            case $f in
+                *.*)
+                    # leaf=`echo $leaf |
+                    #   /bin/sed "s/\([~\.]*\)\.\(.*\)$/\1$suffix.\2/"`
+                    # ksh,bash hack for above sed script
+                    leaf=${leaf%%.*}$suffix.${leaf#*.}
+
+                    [ "$verbose" = "yes" ] &&
+                      echo "$progname: $f will be installed as $leaf"
+                    ;;
+                *)
+                    leaf=$leaf$suffix;;
+            esac
+        fi
+        target=$target/$leaf
+    fi
+
+    [ ! -r $f ] && fatal "can not read $f"
+
+    if cmp -s $f $target
+    then
+        [ "$verbose" = "yes" ] && echo "'$f' not newer than '$target'"
+    else
+        [ "$verbose" = "yes" ] && echo "rm -f $target"
+        rm -f $target
+        echo "cp -p $f $target"
+        cp -p $f $target || exit 1
+        targets="$targets $target"    # keep list for chmod below
+    fi
+done
+
+if [ "$mode" -a "$targets" ]
+then
+     [ "$verbose" = "yes" ] && echo "chmod $mode $targets"
+     chmod $mode $targets
+fi
+
+exit 0
+
+# Local Variables: ***
+# mode:ksh ***
+# End: ***