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llvm-mirror/tools/llvm-config/llvm-config.in.in
Chris Lattner e7ff5ce21d Allow things like --libs CBackend 
llvm-svn: 30089
2006-09-04 05:35:23 +00:00

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#!@PERL@
##===- tools/llvm-config ---------------------------------------*- perl -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file was developed by Eric Kidd and is distributed under
# the University of Illinois Open Source License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
#
# Synopsis: Prints out compiler options needed to build against an installed
# copy of LLVM.
#
# Syntax: llvm-config OPTIONS... [COMPONENTS...]
#
##===----------------------------------------------------------------------===##
use 5.006;
use strict;
use warnings;
#---- begin autoconf values ----
my $PACKAGE_NAME = q{@PACKAGE_NAME@};
my $VERSION = q{@PACKAGE_VERSION@};
my $PREFIX = q{@LLVM_PREFIX@};
my $LLVM_CONFIGTIME = q{@LLVM_CONFIGTIME@};
my $LLVM_SRC_ROOT = q{@abs_top_srcdir@};
my $LLVM_OBJ_ROOT = q{@abs_top_builddir@};
my $LLVM_ON_WIN32 = q{@LLVM_ON_WIN32@};
my $LLVM_ON_UNIX = q{@LLVM_ON_UNIX@};
my $LLVMGCCDIR = q{@LLVMGCCDIR@};
my $LLVMGCC = q{@LLVMGCC@};
my $LLVMGXX = q{@LLVMGXX@};
my $LLVMGCC_VERSION = q{@LLVMGCC_VERSION@};
my $LLVMGCC_MAJVERS = q{@LLVMGCC_MAJVERS@};
my $ENDIAN = q{@ENDIAN@};
my $SHLIBEXT = q{@SHLIBEXT@};
my $EXEEXT = q{@EXEEXT@};
my $OS = q{@OS@};
my $ARCH = lc(q{@ARCH@});
my $TARGET_TRIPLE = q{@target@};
my $TARGETS_TO_BUILD = q{@TARGETS_TO_BUILD@};
my $TARGET_HAS_JIT = q{@TARGET_HAS_JIT@};
my @TARGETS_BUILT = map { lc($_) } qw{@TARGETS_TO_BUILD@};
#---- end autoconf values ----
#---- begin Makefile values ----
my $CXXFLAGS = q{@LLVM_CXXFLAGS@};
my $LDFLAGS = q{@LLVM_LDFLAGS@};
my $SYSTEM_LIBS = q{@LIBS@};
my $LLVM_BUILDMODE = q{@LLVM_BUILDMODE@};
#---- end Makefile values ----
# Figure out where llvm-config is being run from. Primarily, we care if it has
# been installed, or is running from the build directory, which changes the
# locations of some files.
# Convert the current executable name into its directory (e.g. ".").
my ($RUN_DIR) = ($0 =~ /^(.*)\/.*$/);
# Turn the directory into an absolute directory on the file system, also pop up
# from "bin" into the build or prefix dir.
my $ABS_RUN_DIR = `cd $RUN_DIR/..; pwd`;
chomp($ABS_RUN_DIR);
# Compute the absolute object directory build, e.g. "foo/llvm/Debug".
my $ABS_OBJ_ROOT = "$LLVM_OBJ_ROOT/$LLVM_BUILDMODE";
$ABS_OBJ_ROOT = `cd $ABS_OBJ_ROOT; pwd` if (-d $ABS_OBJ_ROOT);
chomp($ABS_OBJ_ROOT);
my $INCLUDEDIR = "$ABS_RUN_DIR/include";
my $LIBDIR = "$ABS_RUN_DIR/lib";
my $BINDIR = "$ABS_RUN_DIR/bin";
if ($ABS_RUN_DIR eq $ABS_OBJ_ROOT) {
# If we are running out of the build directory, the include dir is in the
# srcdir.
$INCLUDEDIR = "$LLVM_SRC_ROOT/include";
} else {
# If installed, ignore the prefix the tree was configured with, use the
# current prefix.
$PREFIX = $ABS_RUN_DIR;
}
sub usage;
sub fix_library_names (@);
sub fix_library_files (@);
sub expand_dependencies (@);
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_libfiles = 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 $SYSTEM_LIBS\n";
} elsif ($arg eq "--libs") {
$has_opt = 1; $want_libs = 1;
} elsif ($arg eq "--libnames") {
$has_opt = 1; $want_libnames = 1;
} elsif ($arg eq "--libfiles") {
$has_opt = 1; $want_libfiles = 1;
} elsif ($arg eq "--components") {
$has_opt = 1; print join(' ', name_map_entries), "\n";
} elsif ($arg eq "--targets-built") {
$has_opt = 1; print join(' ', @TARGETS_BUILT), "\n";
} elsif ($arg eq "--build-mode") {
$has_opt = 1; print "$LLVM_BUILDMODE\n";
} elsif ($arg eq "--obj-root") {
$has_opt = 1; print `cd $LLVM_OBJ_ROOT/; pwd`;
} elsif ($arg eq "--src-root") {
$has_opt = 1; print `cd $LLVM_SRC_ROOT/; pwd`;
} else {
usage();
}
} else {
push @components, $arg;
}
}
# If no options were specified, fail.
usage unless $has_opt;
# If no components were specified, default to 'all'.
if (@components == 0) {
push @components, 'all';
}
# Force component names to lower case.
@components = map lc, @components;
# Handle any arguments which require building our dependency graph.
if ($want_libs || $want_libnames || $want_libfiles) {
my @libs = expand_dependencies(@components);
print join(' ', fix_library_names(@libs)), "\n" if ($want_libs);
print join(' ', @libs), "\n" if ($want_libnames);
print join(' ', fix_library_files(@libs)), "\n" if ($want_libfiles);
}
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 engine bcreader scalaropts
Options:
--version Print LLVM version.
--prefix Print the installation prefix.
--src-root Print the source root LLVM was built from.
--obj-root Print the object root used to build LLVM.
--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 Print Linker flags.
--libs Libraries needed to link against LLVM components.
--libnames Bare library names for in-tree builds.
--libfiles Fully qualified library filenames for makefile depends.
--components List of all possible components.
--targets-built List of all targets currently built.
--build-mode Print build mode of LLVM tree (e.g. Debug or Release).
Typical components:
all All LLVM libraries (default).
backend Either a native backend or the C backend.
engine Either a native JIT or a bytecode interpreter.
__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;
}
# Turn the list of libraries into a list of files.
sub fix_library_files(@) {
my @libs = @_;
my @result;
foreach my $lib (@libs) {
# Transform the bare library name into a filename.
push @result, "$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 have_native_backend;
sub find_best_engine;
sub expand_names (@);
sub find_all_required_sets (@);
sub find_all_required_sets_helper ($$@);
# 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_dependencies (@) {
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.
my @result;
foreach my $set (@sorted_sets) { push @result, @{$set}; }
return @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) = /^\s*([^:]+):\s*(.*)\s*$/;
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'} = have_native_backend() ? [$ARCH] : [];
$NAME_MAP{'backend'} = have_native_backend() ? ['native'] : ['cbackend'];
$NAME_MAP{'engine'} = find_best_engine;
$NAME_MAP{'all'} = [name_map_entries]; # Must be last.
}
# Return true if we have a native backend to use.
sub have_native_backend {
my %BUILT;
foreach my $target (@TARGETS_BUILT) { $BUILT{$target} = 1; }
return defined $NAME_MAP{$ARCH} && defined $BUILT{$ARCH};
}
# Find a working subclass of ExecutionEngine for this platform.
sub find_best_engine {
if (have_native_backend && $TARGET_HAS_JIT) {
return ['jit', 'native'];
} else {
return ['interpreter'];
}
}
# 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);
}
# 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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