c++: fix a comment

[bison.git] / etc / prefix-gnulib-mk

diff --git a/etc/prefix-gnulib-mk b/etc/prefix-gnulib-mk
index 08d22f288d9433a236fff9bf3f19dc553198ccd3..81c0924fbe294b548df6f73d3e1c1bc7b70ff1a0 100755 (executable)
--- a/etc/prefix-gnulib-mk
+++ b/etc/prefix-gnulib-mk
@@ -2,15 +2,53 @@
 
 use strict;
 use IO::File;
+use Getopt::Long;
+use File::Basename; # for dirname
 
-my $prefix = "lib/";
+my $VERSION = '2012-01-21 17:13'; # UTC
+(my $ME = $0) =~ s|.*/||;
+
+my $prefix;
+my $lib_name;
+
+sub usage ($)
+{
+  my ($exit_code) = @_;
+  my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
+  if ($exit_code != 0)
+    {
+      print $STREAM "Try '$ME --help' for more information.\n";
+    }
+  else
+    {
+      print $STREAM <<EOF;
+Usage: $ME --lib-name=NAME FILE
+   or: $ME [--help|--version]
+Rewrite a gnulib-tool-generated FILE like lib/gnulib.mk to work with
+automake's subdir-objects.
+
+OPTIONS:
+
+This option must be specified:
+
+   --lib-name=NAME    library name, often "lib\$project"
+
+The following are optional:
+
+   --help             display this help and exit
+   --version          output version information and exit
+
+EOF
+    }
+  exit $exit_code;
+}
 
 # contents ($FILE_NAME)
 # ---------------------
 sub contents ($)
 {
   my ($file) = @_;
-  local $/;                    # Turn on slurp-mode.
+  local $/;                     # Turn on slurp-mode.
   my $f = new IO::File "< $file" or die "$file";
   my $contents = $f->getline or die "$file";
   $f->close;
@@ -26,7 +64,7 @@ sub prefix_word ($)
 {
   local ($_) = @_;
   $_ = $prefix . $_
-    unless m{^\$\(\w+\)} || $_ eq "Makefile";
+    unless /^-/ || m{^\$\(\w+\)} || $_ eq "Makefile" || $_ eq '\\';
   return $_;
 }
 
@@ -71,10 +109,7 @@ sub prefix_assignment ($$)
 
   # Variables which name depend on the location: libbison_a_SOURCES =>
   # lib_libbison_a_SOURCES.
-  $lhs_and_assign_op =~ s/(libbison)/lib_$1/g;
-
-  # Do not use gl_LIBOBJS, but its prefixed version.
-  $rhs =~ s/gl_LIBOBJS/gl_PREFIXED_LIBOBJS/g;
+  $lhs_and_assign_op =~ s/($lib_name)/lib_$1/g;
 
   return $lhs_and_assign_op . $rhs;
 }
@@ -93,7 +128,7 @@ sub prefix ($)
   # Prefix all the occurrence of files in rules.  If there is nothing
   # after in the :, it's probably a phony target, or a suffix rule.
   # Don't touch it.
-  s{^([\w.]+ *: *\w.*)$}
+  s{^([-\w+/]+\.[-\w.]+ *: *\S.*)$}
    {prefix_words($1)}gem;
 
   # Prefix files in variables.
@@ -103,7 +138,7 @@ sub prefix ($)
   # These three guys escape all the other regular rules.
   s{(charset\.alias|ref-add\.sed|ref-del\.sed)}{$prefix$1}g;
   # Unfortunately, as a result we sometimes have lib/lib.
-  s{lib/lib/}{lib/}g;
+  s{($prefix){2}}{$1}g;
 
   # $(srcdir) is actually $(top_srcdir)/lib.
   s{\$\(srcdir\)}{\$(top_srcdir)/lib}g;
@@ -112,6 +147,12 @@ sub prefix ($)
   # not work when we have a $@ with a directory in it.
   s{t-\$\@}{\$\@-t}g;
 
+  # Some AC_SUBST patterns remain and would better be Make macros.
+  s{\@(MKDIR_P)\@}{\$($1)}g;
+
+  # Adjust paths in mkdir.
+  s{(\$\(MKDIR_P\))\s*(\w+)}{$1 $prefix$2}g;
+
   return $_;
 }
 
@@ -128,8 +169,33 @@ sub process ($)
   print $out $contents;
 }
 
-process ("lib/gnulib.mk")
-
+{
+  GetOptions
+    (
+     'lib-name=s' => \$lib_name,
+     help => sub { usage 0 },
+     version => sub { print "$ME version $VERSION\n"; exit },
+    ) or usage 1;
+
+  my $fail = 0;
+  defined $lib_name
+    or (warn "$ME: no library name; use --lib-name=NAME\n"), $fail = 1;
+
+  # There must be exactly one argument.
+  @ARGV == 0
+    and (warn "$ME: missing FILE argument\n"), $fail = 1;
+  1 < @ARGV
+    and (warn "$ME: too many arguments:\n", join ("\n", @ARGV), "\n"),
+      $fail = 1;
+  $fail
+    and usage 1;
+
+  my $file = $ARGV[0];
+  $prefix = (dirname $file) . '/';
+  warn "prefix=$prefix\n";
+
+  process $file;
+}
 
 ### Setup "GNU" style for perl-mode and cperl-mode.
 ## Local Variables:
@@ -146,4 +212,9 @@ process ("lib/gnulib.mk")
 ## cperl-extra-newline-before-brace: t
 ## cperl-merge-trailing-else: nil
 ## cperl-continued-statement-offset: 2
+## eval: (add-hook 'write-file-hooks 'time-stamp)
+## time-stamp-start: "my $VERSION = '"
+## time-stamp-format: "%:y-%02m-%02d %02H:%02M"
+## time-stamp-time-zone: "UTC"
+## time-stamp-end: "'; # UTC"
 ## End: