1 files changed, 73 insertions, 0 deletions
diff --git a/perl/Curl_easy/Makefile.PL b/perl/Curl_easy/Makefile.PL
index 58a8528ad..551808fa9 100644
--- a/perl/Curl_easy/Makefile.PL
+++ b/perl/Curl_easy/Makefile.PL
@@ -12,3 +12,76 @@ WriteMakefile(
     'INC'	=> '',     # e.g., '-I/usr/include/other' 
     'clean'	=> {FILES => "head.out body.out"}
 );
+
+#
+# This utility helper generates the constants function from curl.h
+#
+# It is normally only used by the maintainer, but if you're curl is older
+# or missing some constants, you can delete curlopt-constants.c and re-run 'perl Makefile.PL'
+#
+
+if (!open(CONSTANTS,"<curlopt-constants.c")) {
+    print "Rebuilding curlopt-constants.c for your libcurl version\n";
+    close(CONSTANTS); 
+
+#
+# You may need to specify where to find curl.h on your platform
+# These are guesses only
+#
+my $curl_h;
+HEADER: foreach my $try (qw(
+
+	curl.h                        
+	../../include/curl.h              
+	/usr/include/curl/curl.h    
+	/usr/local/include/curl/curl.h
+	C:\\INCLUDE\\CURL\\CURL.H  
+
+	))
+{
+    if (-e $try) {
+	$curl_h=$try;
+	last HEADER;
+    }
+}
+
+if (!defined($curl_h)) {
+	die "Could not rebuild curlopt-constants.c - can't find curl.h\n";
+}
+
+print "Found curl.h in $curl_h\n";
+open (CURL_H,"<".$curl_h) or die "Can't open curl.h\n";
+my %types;
+my %codes;
+while(<CURL_H>) {
+    if ($_ =~ m/CINIT\(/ and $_ !~ m/#/) {
+	my ($option,$type,$code)=m/.*CINIT\((\w*)\s*,\s*(\w+)\s*,\s*(\d+).*/;
+	$types{$option}=$type;
+	$codes{$option}=$code;
+    }
+}
+close(CURL_H);
+
+# some things are ifdefed out...
+foreach my $ifdef0 (qw(FLAGS PROGRESSMODE))
+{
+	delete $types{$ifdef0}; delete $codes{$ifdef0};
+}
+
+open(CURL_XS,">curlopt-constants.c") or die "Can't write curlopt-constants.c\n";
+foreach my $next_initial ('A'..'Z') {
+    print CURL_XS "        case '$next_initial':\n";
+    my $count=0;
+    foreach my $option (sort keys %types) {
+	my $initial=substr($option,0,1);
+	if ($next_initial eq $initial) {
+	    print CURL_XS "            if (strEQ(name, \"$option\")) return CURLOPT_$option;\n";
+	    $count++;
+	}
+    }    
+    if ($count) {
+	print CURL_XS "            break;\n";
+    }
+}
+close(CURL_XS);
+}