2 ##===- tools/llvm-config ---------------------------------------*- perl -*-===##
4 # The LLVM Compiler Infrastructure
6 # This file was developed by Eric Kidd and is distributed under
7 # the University of Illinois Open Source License. See LICENSE.TXT for details.
9 ##===----------------------------------------------------------------------===##
11 # Synopsis: Prints out compiler options needed to build against an installed
14 # Syntax: llvm-config OPTIONS... [COMPONENTS...]
16 ##===----------------------------------------------------------------------===##
22 #---- begin autoconf values ----
23 my $PACKAGE_NAME = q{@PACKAGE_NAME@};
24 my $VERSION = q{@PACKAGE_VERSION@};
25 my $PREFIX = q{@LLVM_PREFIX@};
26 my $LLVM_CONFIGTIME = q{@LLVM_CONFIGTIME@};
27 my $LLVM_SRC_ROOT = q{@abs_top_srcdir@};
28 my $LLVM_OBJ_ROOT = q{@abs_top_builddir@};
29 my $LLVM_ON_WIN32 = q{@LLVM_ON_WIN32@};
30 my $LLVM_ON_UNIX = q{@LLVM_ON_UNIX@};
31 my $LLVMGCCDIR = q{@LLVMGCCDIR@};
32 my $LLVMGCC = q{@LLVMGCC@};
33 my $LLVMGXX = q{@LLVMGXX@};
34 my $LLVMGCC_VERSION = q{@LLVMGCC_VERSION@};
35 my $LLVMGCC_MAJVERS = q{@LLVMGCC_MAJVERS@};
36 my $ENDIAN = q{@ENDIAN@};
37 my $SHLIBEXT = q{@SHLIBEXT@};
38 my $EXEEXT = q{@EXEEXT@};
40 my $ARCH = lc(q{@ARCH@});
41 my $TARGET_TRIPLE = q{@target@};
42 my $TARGETS_TO_BUILD = q{@TARGETS_TO_BUILD@};
43 my $TARGET_HAS_JIT = q{@TARGET_HAS_JIT@};
44 my @TARGETS_BUILT = map { lc($_) } qw{@TARGETS_TO_BUILD@};
45 #---- end autoconf values ----
47 #---- begin Makefile values ----
48 my $CXXFLAGS = q{@LLVM_CXXFLAGS@};
49 my $LDFLAGS = q{@LLVM_LDFLAGS@};
50 my $LLVM_BUILDMODE = q{@LLVM_BUILDMODE@};
51 #---- end Makefile values ----
53 # Figure out where llvm-config is being run from. Primarily, we care if it has
54 # been installed, or is running from the build directory, which changes the
55 # locations of some files.
57 # Convert the current executable name into its directory (e.g. ".").
58 my ($RUN_DIR) = ($0 =~ /^(.*)\/.*$/);
60 # Turn the directory into an absolute directory on the file system, also pop up
61 # from "bin" into the build or prefix dir.
62 my $ABS_RUN_DIR = `cd $RUN_DIR/..; pwd`;
65 # Compute the absolute object directory build, e.g. "foo/llvm/Debug".
66 my $ABS_OBJ_ROOT = `cd $LLVM_OBJ_ROOT/$LLVM_BUILDMODE; pwd`;
69 my $INCLUDEDIR = "$ABS_RUN_DIR/include";
70 my $LIBDIR = "$ABS_RUN_DIR/lib";
71 my $BINDIR = "$ABS_RUN_DIR/bin";
72 if ($ABS_RUN_DIR eq $ABS_OBJ_ROOT) {
73 # If we are running out of the build directory, the include dir is in the
75 $INCLUDEDIR = "$LLVM_SRC_ROOT/include";
77 # If installed, ignore the prefix the tree was configured with, use the
79 $PREFIX = $ABS_RUN_DIR;
83 sub fix_library_names (@);
84 sub expand_dependecies (@);
87 # Parse our command-line arguments.
92 my $want_libnames = 0;
93 my $want_components = 0;
94 foreach my $arg (@ARGV) {
96 if ($arg eq "--version") {
97 $has_opt = 1; print "$VERSION\n";
98 } elsif ($arg eq "--prefix") {
99 $has_opt = 1; print "$PREFIX\n";
100 } elsif ($arg eq "--bindir") {
101 $has_opt = 1; print "$BINDIR\n";
102 } elsif ($arg eq "--includedir") {
103 $has_opt = 1; print "$INCLUDEDIR\n";
104 } elsif ($arg eq "--libdir") {
105 $has_opt = 1; print "$LIBDIR\n";
106 } elsif ($arg eq "--cxxflags") {
107 $has_opt = 1; print "-I$INCLUDEDIR $CXXFLAGS\n";
108 } elsif ($arg eq "--ldflags") {
109 $has_opt = 1; print "-L$LIBDIR $LDFLAGS\n";
110 } elsif ($arg eq "--libs") {
111 $has_opt = 1; $want_libs = 1;
112 } elsif ($arg eq "--libnames") {
113 $has_opt = 1; $want_libnames = 1;
114 } elsif ($arg eq "--components") {
115 $has_opt = 1; print join(' ', name_map_entries), "\n";
116 } elsif ($arg eq "--targets-built") {
117 $has_opt = 1; print join(' ', @TARGETS_BUILT), "\n";
118 } elsif ($arg eq "--build-mode") {
119 $has_opt = 1; print "$LLVM_BUILDMODE\n";
120 } elsif ($arg eq "--obj-root") {
121 $has_opt = 1; print `cd $LLVM_OBJ_ROOT/; pwd` . "\n";
122 } elsif ($arg eq "--src-root") {
123 $has_opt = 1; print `cd $LLVM_SRC_ROOT/; pwd` . "\n";
128 push @components, $arg;
132 # If no options were specified, fail.
133 usage unless $has_opt;
135 # If no components were specified, default to 'all'.
136 if (@components == 0) {
137 push @components, 'all';
140 # Handle any arguments which require building our dependency graph.
141 if ($want_libs || $want_libnames) {
142 my @libs = expand_dependecies(@components);
144 print join(' ', fix_library_names(@libs)), "\n";
146 if ($want_libnames) {
147 print join(' ', @libs), "\n";
153 #==========================================================================
155 #==========================================================================
158 print STDERR <<__EOD__;
159 Usage: llvm-config <OPTION>... [<COMPONENT>...]
161 Get various configuration information needed to compile programs which use
162 LLVM. Typically called from 'configure' scripts. Examples:
163 llvm-config --cxxflags
164 llvm-config --ldflags
165 llvm-config --libs engine bcreader scalaropts
168 --version Print LLVM version.
169 --prefix Print the installation prefix.
170 --src-root Print the source root LLVM was built from.
171 --obj-root Print the object root used to build LLVM.
172 --bindir Directory containing LLVM executables.
173 --includedir Directory containing LLVM headers.
174 --libdir Directory containing LLVM libraries.
175 --cxxflags C++ compiler flags for files that include LLVM headers.
176 --ldflags Print Linker flags.
177 --libs Libraries needed to link against LLVM components.
178 --libnames Bare library names for in-tree builds.
179 --components List of all possible components.
180 --targets-built List of all targets currently built.
181 --build-mode Print build mode of LLVM tree (e.g. Debug or Release).
183 all All LLVM libraries (default).
184 backend Either a native backend or the C backend.
185 engine Either a native JIT or a bytecode interpreter.
190 # Use -lfoo instead of libfoo.a whenever possible, and add directories to
191 # files which can't be found using -L.
192 sub fix_library_names (@) {
195 foreach my $lib (@libs) {
196 # Transform the bare library name appropriately.
197 my ($basename) = ($lib =~ /^lib([^.]*)\.a/);
198 if (defined $basename) {
199 push @result, "-l$basename";
201 push @result, "$LIBDIR/$lib";
208 #==========================================================================
209 # Library Dependency Analysis
210 #==========================================================================
211 # Given a few human-readable library names, find all their dependencies
212 # and sort them into an order which the linker will like. If we packed
213 # our libraries into fewer archives, we could make the linker do much
214 # of this work for us.
216 # Libraries have two different types of names in this code: Human-friendly
217 # "component" names entered on the command-line, and the raw file names
218 # we use internally (and ultimately pass to the linker).
220 # To understand this code, you'll need a working knowledge of Perl 5,
221 # and possibly some quality time with 'man perlref'.
223 sub load_dependencies;
225 sub have_native_backend;
226 sub find_best_engine;
227 sub expand_names (@);
228 sub find_all_required_sets (@);
229 sub find_all_required_sets_helper ($$@);
231 # Each "set" contains one or more libraries which must be included as a
232 # group (due to cyclic dependencies). Sets are represented as a Perl array
233 # reference pointing to a list of internal library names.
236 # Various mapping tables.
237 my %LIB_TO_SET_MAP; # Maps internal library names to their sets.
238 my %SET_DEPS; # Maps sets to a list of libraries they depend on.
239 my %NAME_MAP; # Maps human-entered names to internal names.
241 # Have our dependencies been loaded yet?
242 my $DEPENDENCIES_LOADED = 0;
244 # Given a list of human-friendly component names, translate them into a
245 # complete set of linker arguments.
246 sub expand_dependecies (@) {
249 my @required_sets = find_all_required_sets(expand_names(@libs));
250 my @sorted_sets = topologically_sort_sets(@required_sets);
252 # Expand the library sets into libraries.
254 foreach my $set (@sorted_sets) { push @result, @{$set}; }
258 # Load in the raw dependency data stored at the end of this file.
259 sub load_dependencies {
260 return if $DEPENDENCIES_LOADED;
261 $DEPENDENCIES_LOADED = 1;
264 my ($libs, $deps) = /^(^[^:]+): ?(.*)$/;
265 die "Malformed dependency data" unless defined $deps;
266 my @libs = split(' ', $libs);
267 my @deps = split(' ', $deps);
269 # Record our dependency data.
272 foreach my $lib (@libs) { $LIB_TO_SET_MAP{$lib} = $set; }
273 $SET_DEPS{$set} = \@deps;
278 # Build a map converting human-friendly component names into internal
281 # Add entries for all the actual libraries.
282 foreach my $set (@SETS) {
283 foreach my $lib (sort @$set) {
284 my $short_name = $lib;
285 $short_name =~ s/^(lib)?LLVM([^.]*)\..*$/$2/;
286 $short_name =~ tr/A-Z/a-z/;
287 $NAME_MAP{$short_name} = [$lib];
291 # Add virtual entries.
292 $NAME_MAP{'native'} = have_native_backend() ? [$ARCH] : [];
293 $NAME_MAP{'backend'} = have_native_backend() ? ['native'] : ['cbackend'];
294 $NAME_MAP{'engine'} = find_best_engine;
295 $NAME_MAP{'all'} = [name_map_entries]; # Must be last.
298 # Return true if we have a native backend to use.
299 sub have_native_backend {
301 foreach my $target (@TARGETS_BUILT) { $BUILT{$target} = 1; }
302 return defined $NAME_MAP{$ARCH} && defined $BUILT{$ARCH};
305 # Find a working subclass of ExecutionEngine for this platform.
306 sub find_best_engine {
307 if (have_native_backend && $TARGET_HAS_JIT) {
308 return ['jit', 'native'];
310 return ['interpreter'];
314 # Get all the human-friendly component names.
315 sub name_map_entries {
317 return sort keys %NAME_MAP;
320 # Map human-readable names to internal library names.
321 sub expand_names (@) {
324 foreach my $name (@names) {
325 if (defined $LIB_TO_SET_MAP{$name}) {
326 # We've hit bottom: An actual library name.
328 } elsif (defined $NAME_MAP{$name}) {
329 # We've found a short name to expand.
330 push @result, expand_names(@{$NAME_MAP{$name}});
332 print STDERR "llvm-config: unknown component name: $name\n";
339 # Given a list of internal library names, return all sets of libraries which
340 # will need to be included by the linker (in no particular order).
341 sub find_all_required_sets (@) {
345 find_all_required_sets_helper(\%sets_added, \@result, @libs);
349 # Recursive closures are pretty broken in Perl, so we're going to separate
350 # this function from find_all_required_sets and pass in the state we need
351 # manually, as references. Yes, this is fairly unpleasant.
352 sub find_all_required_sets_helper ($$@) {
353 my ($sets_added, $result, @libs) = @_;
354 foreach my $lib (@libs) {
355 my $set = $LIB_TO_SET_MAP{$lib};
356 next if defined $$sets_added{$set};
357 $$sets_added{$set} = 1;
359 find_all_required_sets_helper($sets_added, $result, @{$SET_DEPS{$set}});
363 # Print a list of sets, with a label. Used for debugging.
364 sub print_sets ($@) {
365 my ($label, @sets) = @_;
367 foreach my $set (@sets) { push @output, join(',', @$set); }
368 print "$label: ", join(';', @output), "\n";
371 # Returns true if $lib is a key in $added.
372 sub has_lib_been_added ($$) {
373 my ($added, $lib) = @_;
374 return defined $$added{$LIB_TO_SET_MAP{$lib}};
377 # Returns true if all the dependencies of $set appear in $added.
378 sub have_all_deps_been_added ($$) {
379 my ($added, $set) = @_;
380 #print_sets(" Checking", $set);
381 #print_sets(" Wants", $SET_DEPS{$set});
382 foreach my $lib (@{$SET_DEPS{$set}}) {
383 return 0 unless has_lib_been_added($added, $lib);
388 # Given a list of sets, topologically sort them using dependencies.
389 sub topologically_sort_sets (@) {
393 SCAN: while (@sets) { # We'll delete items from @sets as we go.
394 #print_sets("So far", reverse(@result));
395 #print_sets("Remaining", @sets);
396 for (my $i = 0; $i < @sets; ++$i) {
398 if (have_all_deps_been_added(\%added, $set)) {
401 #print "Removing $i.\n";
402 splice(@sets, $i, 1);
403 next SCAN; # Restart our scan.
406 die "Can't find a library with no dependencies";
408 return reverse(@result);
411 # Our library dependency data will be added after the '__END__' token, and will
412 # be read through the magic <DATA> filehandle.