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+#!/usr/bin/perl
+#
+# Program: llvm-config
+#
+# Synopsis: Prints out compiler options needed to build against an installed
+# copy of LLVM.
+#
+# Syntax: lllvm-config OPTIONS... [COMPONENTS...]
+#
+# This file was written by Eric Kidd, and is placed into the public domain.
+#
+
+use strict;
+use warnings;
+
+#---- begin autoconf values ----
+my $VERSION = q{@PACKAGE_VERSION@};
+my $PREFIX = q{@LLVM_PREFIX@};
+my $BINDIR = q{@LLVM_BINDIR@};
+my $INCLUDEDIR = q{@LLVM_INCLUDEDIR@};
+my $LIBDIR = q{@LLVM_LIBDIR@};
+my $ARCH = lc(q{@ARCH@});
+my @TARGETS_BUILT = map { lc($_) } qw{@TARGETS_TO_BUILD@};
+#---- end autoconf values ----
+
+#---- begin Makefile values ----
+my $CXXFLAGS = q{@LLVM_CXXFLAGS@};
+my $LDFLAGS = q{@LLVM_LDFLAGS@};
+my $CORE_IS_ARCHIVE = q{@CORE_IS_ARCHIVE@};
+#---- end Makefile values ----
+
+sub usage;
+sub fix_library_names (@);
+sub expand_dependecies (@);
+sub name_map_entries;
+
+# Parse our command-line arguments.
+usage if @ARGV == 0;
+my @components;
+my $has_opt = 0;
+my $want_libs = 0;
+my $want_libnames = 0;
+my $want_components = 0;
+foreach my $arg (@ARGV) {
+ if ($arg =~ /^-/) {
+ if ($arg eq "--version") {
+ $has_opt = 1; print "$VERSION\n";
+ } elsif ($arg eq "--prefix") {
+ $has_opt = 1; print "$PREFIX\n";
+ } elsif ($arg eq "--bindir") {
+ $has_opt = 1; print "$BINDIR\n";
+ } elsif ($arg eq "--includedir") {
+ $has_opt = 1; print "$INCLUDEDIR\n";
+ } elsif ($arg eq "--libdir") {
+ $has_opt = 1; print "$LIBDIR\n";
+ } elsif ($arg eq "--cxxflags") {
+ $has_opt = 1; print "-I$INCLUDEDIR $CXXFLAGS\n";
+ } elsif ($arg eq "--ldflags") {
+ $has_opt = 1; print "-L$LIBDIR $LDFLAGS\n";
+ } elsif ($arg eq "--libs") {
+ $has_opt = 1; $want_libs = 1;
+ } elsif ($arg eq "--libnames") {
+ $has_opt = 1; $want_libnames = 1;
+ } elsif ($arg eq "--components") {
+ $has_opt = 1; print join(' ', name_map_entries), "\n";
+ } elsif ($arg eq "--targets-built") {
+ $has_opt = 1; print join(' ', @TARGETS_BUILT), "\n";
+ } else {
+ usage();
+ }
+ } else {
+ push @components, $arg;
+ }
+}
+
+# If no options were specified, fail.
+usage unless $has_opt;
+
+# If no components were specified, default to 'all'.
+if (@components == 0) {
+ push @components, 'all';
+}
+
+# Handle any arguments which require building our dependency graph.
+if ($want_libs || $want_libnames) {
+ my @libs = expand_dependecies(@components);
+ if ($want_libs) {
+ print join(' ', fix_library_names(@libs)), "\n";
+ }
+ if ($want_libnames) {
+ print join(' ', @libs), "\n";
+ }
+}
+
+exit 0;
+
+#==========================================================================
+# Support Routines
+#==========================================================================
+
+sub usage {
+ print STDERR <<__EOD__;
+Usage: llvm-config <OPTION>... [<COMPONENT>...]
+
+Get various configuration information needed to compile programs which use
+LLVM. Typically called from 'configure' scripts. Examples:
+ llvm-config --cxxflags
+ llvm-config --ldflags
+ llvm-config --libs jitplus
+
+Options:
+ --version LLVM version.
+ --prefix Installation prefix.
+ --bindir Directory containing LLVM executables.
+ --includedir Directory containing LLVM headers.
+ --libdir Directory containing LLVM libraries.
+ --cxxflags C++ compiler flags for files that include LLVM headers.
+ --ldflags Linker flags.
+ --libs Libraries needed to link against LLVM components.
+ --libnames Bare library names for in-tree builds.
+ --components List of all possible components.
+ --targets-built List of all targets currently built.
+Typical components:
+ all All LLVM libraries (default).
+ native A native-code backend for this platform, if any.
+ jitplus All libraries needed to use the LLVM JIT examples.
+__EOD__
+ exit(1);
+}
+
+# Use -lfoo instead of libfoo.a whenever possible, and add directories to
+# files which can't be found using -L.
+sub fix_library_names (@) {
+ my @libs = @_;
+ my @result;
+ foreach my $lib (@libs) {
+ # Transform the bare library name appropriately.
+ my ($basename) = ($lib =~ /^lib([^.]*)\.a/);
+ if (defined $basename) {
+ push @result, "-l$basename";
+ } else {
+ push @result, "$LIBDIR/$lib";
+ }
+ }
+ return @result;
+}
+
+
+#==========================================================================
+# Library Dependency Analysis
+#==========================================================================
+# Given a few human-readable library names, find all their dependencies
+# and sort them into an order which the linker will like. If we packed
+# our libraries into fewer archives, we could make the linker do much
+# of this work for us.
+#
+# Libraries have two different types of names in this code: Human-friendly
+# "component" names entered on the command-line, and the raw file names
+# we use internally (and ultimately pass to the linker).
+#
+# To understand this code, you'll need a working knowledge of Perl 5,
+# and possibly some quality time with 'man perlref'.
+
+sub load_dependencies;
+sub build_name_map;
+sub find_native_platform;
+sub expand_names (@);
+sub find_all_required_sets (@);
+sub find_all_required_sets_helper ($$@);
+sub maybe_fix_core (@);
+
+# Each "set" contains one or more libraries which must be included as a
+# group (due to cyclic dependencies). Sets are represented as a Perl array
+# reference pointing to a list of internal library names.
+my @SETS;
+
+# Various mapping tables.
+my %LIB_TO_SET_MAP; # Maps internal library names to their sets.
+my %SET_DEPS; # Maps sets to a list of libraries they depend on.
+my %NAME_MAP; # Maps human-entered names to internal names.
+
+# Have our dependencies been loaded yet?
+my $DEPENDENCIES_LOADED = 0;
+
+# Given a list of human-friendly component names, translate them into a
+# complete set of linker arguments.
+sub expand_dependecies (@) {
+ my @libs = @_;
+ load_dependencies;
+ my @required_sets = find_all_required_sets(expand_names(@libs));
+ my @sorted_sets = topologically_sort_sets(@required_sets);
+
+ # Expand the library sets into libraries, and apply any
+ # platform-specific hackery.
+ my @result;
+ foreach my $set (@sorted_sets) { push @result, @{$set}; }
+ return maybe_fix_core(@result);
+}
+
+# Load in the raw dependency data stored at the end of this file.
+sub load_dependencies {
+ return if $DEPENDENCIES_LOADED;
+ $DEPENDENCIES_LOADED = 1;
+ while (<DATA>) {
+ # Parse our line.
+ my ($libs, $deps) = /^(^[^:]+): ?(.*)$/;
+ die "Malformed dependency data" unless defined $deps;
+ my @libs = split(' ', $libs);
+ my @deps = split(' ', $deps);
+
+ # Record our dependency data.
+ my $set = \@libs;
+ push @SETS, $set;
+ foreach my $lib (@libs) { $LIB_TO_SET_MAP{$lib} = $set; }
+ $SET_DEPS{$set} = \@deps;
+ }
+ build_name_map;
+}
+
+# Build a map converting human-friendly component names into internal
+# library names.
+sub build_name_map {
+ # Add entries for all the actual libraries.
+ foreach my $set (@SETS) {
+ foreach my $lib (sort @$set) {
+ my $short_name = $lib;
+ $short_name =~ s/^(lib)?LLVM([^.]*)\..*$/$2/;
+ $short_name =~ tr/A-Z/a-z/;
+ $NAME_MAP{$short_name} = [$lib];
+ }
+ }
+
+ # Add virtual entries.
+ $NAME_MAP{'native'} = find_native_platform;
+ $NAME_MAP{'jitplus'} = ['native', 'jit', 'bcreader', 'scalaropts'];
+ $NAME_MAP{'all'} = [name_map_entries]; # Must be last.
+}
+
+# Figure our what native platform we should use, if any.
+sub find_native_platform {
+ my %BUILT;
+ foreach my $target (@TARGETS_BUILT) { $BUILT{$target} = 1; }
+ if (defined $NAME_MAP{$ARCH} && defined $BUILT{$ARCH}) {
+ return [$ARCH];
+ } else {
+ return [];
+ }
+}
+
+# Get all the human-friendly component names.
+sub name_map_entries {
+ load_dependencies;
+ return sort keys %NAME_MAP;
+}
+
+# Map human-readable names to internal library names.
+sub expand_names (@) {
+ my @names = @_;
+ my @result;
+ foreach my $name (@names) {
+ if (defined $LIB_TO_SET_MAP{$name}) {
+ # We've hit bottom: An actual library name.
+ push @result, $name;
+ } elsif (defined $NAME_MAP{$name}) {
+ # We've found a short name to expand.
+ push @result, expand_names(@{$NAME_MAP{$name}});
+ } else {
+ print STDERR "llvm-config: unknown component name: $name\n";
+ exit(1);
+ }
+ }
+ return @result;
+}
+
+# Given a list of internal library names, return all sets of libraries which
+# will need to be included by the linker (in no particular order).
+sub find_all_required_sets (@) {
+ my @libs = @_;
+ my %sets_added;
+ my @result;
+ find_all_required_sets_helper(\%sets_added, \@result, @libs);
+ return @result;
+}
+
+# Recursive closures are pretty broken in Perl, so we're going to separate
+# this function from find_all_required_sets and pass in the state we need
+# manually, as references. Yes, this is fairly unpleasant.
+sub find_all_required_sets_helper ($$@) {
+ my ($sets_added, $result, @libs) = @_;
+ foreach my $lib (@libs) {
+ my $set = $LIB_TO_SET_MAP{$lib};
+ next if defined $$sets_added{$set};
+ $$sets_added{$set} = 1;
+ push @$result, $set;
+ find_all_required_sets_helper($sets_added, $result, @{$SET_DEPS{$set}});
+ }
+}
+
+# Print a list of sets, with a label. Used for debugging.
+sub print_sets ($@) {
+ my ($label, @sets) = @_;
+ my @output;
+ foreach my $set (@sets) { push @output, join(',', @$set); }
+ print "$label: ", join(';', @output), "\n";
+}
+
+# Returns true if $lib is a key in $added.
+sub has_lib_been_added ($$) {
+ my ($added, $lib) = @_;
+ return defined $$added{$LIB_TO_SET_MAP{$lib}};
+}
+
+# Returns true if all the dependencies of $set appear in $added.
+sub have_all_deps_been_added ($$) {
+ my ($added, $set) = @_;
+ #print_sets(" Checking", $set);
+ #print_sets(" Wants", $SET_DEPS{$set});
+ foreach my $lib (@{$SET_DEPS{$set}}) {
+ return 0 unless has_lib_been_added($added, $lib);
+ }
+ return 1;
+}
+
+# Given a list of sets, topologically sort them using dependencies.
+sub topologically_sort_sets (@) {
+ my @sets = @_;
+ my %added;
+ my @result;
+ SCAN: while (@sets) { # We'll delete items from @sets as we go.
+ #print_sets("So far", reverse(@result));
+ #print_sets("Remaining", @sets);
+ for (my $i = 0; $i < @sets; ++$i) {
+ my $set = $sets[$i];
+ if (have_all_deps_been_added(\%added, $set)) {
+ push @result, $set;
+ $added{$set} = 1;
+ #print "Removing $i.\n";
+ splice(@sets, $i, 1);
+ next SCAN; # Restart our scan.
+ }
+ }
+ die "Can't find a library with no dependencies";
+ }
+ return reverse(@result);
+}
+
+# Nasty hack to work around the fact that LLVMCore changes file type on
+# certain platforms.
+sub maybe_fix_core (@) {
+ my @libs = @_;
+ my @result;
+ foreach my $lib (@libs) {
+ if ($lib eq "LLVMCore.o" && $CORE_IS_ARCHIVE) {
+ push @result, "libLLVMCore.a";
+ } else {
+ push @result, $lib;
+ }
+ }
+ return @result;
+}
+
+# Our library dependency data will be added after the '__END__' token, and will
+# be read through the magic <DATA> filehandle.
+__END__
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