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# Copyright (c) 1997-2024
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://polymake.org
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#-------------------------------------------------------------------------------
# Extracts all public symbols from application shared modules
# and generates a source file pretending to define them all.
use strict;
use Config;
my @out;
my $nmopts= $^O eq "darwin" ? "-Ugp" : "--defined-only --extern-only -p";
for my $shlib (@ARGV) {
-r $shlib or die "shared module $shlib does not exist or unreadable\n";
open SYMS, "nm $nmopts $shlib |"
or die "can't run nm $shlib: $!\n";
my ($appname)= $shlib =~ m{(?:^|/)(\w+)\.$Config::Config{dlext}$}
or die "can't derive application name from shared module name $shlib\n";
my $prefix="8polymake".length($appname).$appname;
while (<SYMS>) {
if (/ [TW] ([_ZNK]+$prefix\w+)$/) {
if ( $^O eq "darwin" ) { # aliases don't seem to work on MacOS, so we actually define the functions with empty body
my $functionname = $1;
$functionname =~ s/^__/_/;
push @out, "void $functionname() {};\n";
} else {
push @out, "void $1() __attribute__((alias(\"__dummy\")));\n";
}
}
}
close SYMS;
}
if (@out) {
if ($^O eq "darwin") {
print "#ifndef POLYMAKE_FAKE_FUNCTIONS\n";
}
print <<'.';
void __dummy() __attribute__((visibility ("hidden")));
void __dummy() { }
.
if ($^O eq "darwin") {
print "#endif\n";
}
print "#ifdef POLYMAKE_FAKE_FUNCTIONS\n", @out, "#endif\n";
} else {
warn "no external symbols found!\n";
exit(1);
}
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