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#!/usr/bin/env perl
#####
# findsym.pl
# Andy Hammerlindl 2010/06/01
#
# Extract static symbols used in builtin.cc and write code so that they are
# translated only once when creating the symbol table.
#####
$outname = shift(@ARGV);
if (not $outname) {
print STDERR "usage ./findsym.pl out_symbols.h file1.cc file2.cc ...\n";
exit(1);
}
open(header, ">$outname") ||
die("Couldn't open $outname for writing");
print header <<END;
/*****
* This file is automatically generated by findsym.pl
* Changes will be overwritten.
*****/
// If the ADDSYMBOL macro is not already defined, define it with the default
// purpose of referring to an external pre-translated symbol, such that
// SYM(name) also refers to that symbol.
#ifndef ADDSYMBOL
#define ADDSYMBOL(name) extern sym::symbol PRETRANSLATED_SYMBOL_##name
#define SYM(name) PRETRANSLATED_SYMBOL_##name
#endif
END
sub add {
print header "ADDSYMBOL(".$_[0].");\n";
}
my %symbols = ();
foreach my $inname (@ARGV) {
open(infile, $inname) ||
die("Couldn't open $inname");
while (<infile>) {
while (m/SYM\(([_A-Za-z][_A-Za-z0-9]*)\)/gx) {
$symbols{ $1 } = 1;
}
}
}
foreach my $s (sort keys %symbols) {
add($s);
}
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