Simplify names.

[bison.git] / build-aux / cross-options.pl

diff --git a/build-aux/cross-options.pl b/build-aux/cross-options.pl
index cbd11888bd21df4f1fbe338ef1612e5281f28702..2cec3696162e487e0bb0cae9b3d7859fd18348fd 100755 (executable)
--- a/build-aux/cross-options.pl
+++ b/build-aux/cross-options.pl
@@ -7,16 +7,29 @@ use strict;
 my %option;
 while (<>)
 {
-    if (/^\s*(?:(-\w), )?(--[-\w]+)(\[?)(=[-\w]+)?\]?/)
+    if (/^\s*             # Initial spaces.
+        (?:(-\w),\s+)?    # $1: $short: Possible short option.
+        (--[-\w]+)        # $2: $long:  Long option.
+        (\[?)             # $3: $opt:   '[' iff the argument is optional.
+        (?:=(\S+))?       # $4: $arg:   Possible argument name.
+        \s                # Spaces.
+        /x)
     {
        my ($short, $long, $opt, $arg) = ($1, $2, $3, $4);
        $short = defined $short ? '@option{' . $short . '}' : '';
        if ($arg)
        {
+            # if $opt, $arg contains the closing ].
+            substr ($arg, -1) = ''
+                if $opt eq '[';
            $arg =~ s/^=//;
-           $arg = '@var{' . lc ($arg) . '}';
+            $arg = lc ($arg);
+            # If the argument is compite (e.g., for --define[=NAME[=VALUE]]),
+            # put each word in @var, to build @var{name}[=@var{value}], not
+            # @var{name[=value]}].
+           $arg =~ s/(\w+)/\@var{$1}/g;
            $arg = '[' . $arg . ']'
-               if defined $opt;
+               if $opt eq '[';
            $option{"$long=$arg"} = $short ? "$short $arg" : '';
        }
        else
@@ -28,5 +41,8 @@ while (<>)
 
 foreach my $long (sort keys %option)
 {
-    printf "\@item %-40s \@tab %s\n", '@option{' . $long . '}', $option{$long};
+    # Avoid trailing spaces.
+    printf ("\@item %-40s \@tab%s\n",
+            '@option{' . $long . '}',
+            $option{$long} ? " $option{$long}" : "");
 }