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Diffstat (limited to 'contrib/llvm/tools/llvm-config/llvm-config.in.in')
| -rw-r--r-- | contrib/llvm/tools/llvm-config/llvm-config.in.in | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-config/llvm-config.in.in b/contrib/llvm/tools/llvm-config/llvm-config.in.in new file mode 100644 index 0000000..d435d57 --- /dev/null +++ b/contrib/llvm/tools/llvm-config/llvm-config.in.in @@ -0,0 +1,460 @@ +#!@PERL@ +##===- tools/llvm-config ---------------------------------------*- perl -*-===## +# +# The LLVM Compiler Infrastructure +# +# This file 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; +use Cwd 'abs_path'; + +#---- 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 $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 ---- + +# Must pretend x86_64 architecture is really x86, otherwise the native backend +# won't get linked in. +$ARCH = "x86" if $ARCH eq "x86_64"; + +#---- begin Makefile values ---- +my $CPPFLAGS = q{@LLVM_CPPFLAGS@}; +my $CFLAGS = q{@LLVM_CFLAGS@}; +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 $ABS_RUN_DIR = abs_path("$RUN_DIR/.."); +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 = abs_path("$ABS_OBJ_ROOT") if (-d $ABS_OBJ_ROOT); +chomp($ABS_OBJ_ROOT); + +my $INCLUDEDIR = "$ABS_RUN_DIR/include"; +my $INCLUDEOPTION = "-I$INCLUDEDIR"; +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"; + # We need include files from both the srcdir and objdir. + $INCLUDEOPTION = "-I$INCLUDEDIR -I$LLVM_OBJ_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 "--cppflags") { + $has_opt = 1; print "$INCLUDEOPTION $CPPFLAGS\n"; + } elsif ($arg eq "--cflags") { + $has_opt = 1; print "$INCLUDEOPTION $CFLAGS\n"; + } elsif ($arg eq "--cxxflags") { + $has_opt = 1; print "$INCLUDEOPTION $CXXFLAGS\n"; + } elsif ($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 "--host-target") { + $has_opt = 1; print "$TARGET_TRIPLE\n"; + } elsif ($arg eq "--build-mode") { + $has_opt = 1; print "$LLVM_BUILDMODE\n"; + } elsif ($arg eq "--obj-root") { + $has_opt = 1; print abs_path("$LLVM_OBJ_ROOT/"); + } elsif ($arg eq "--src-root") { + $has_opt = 1; print abs_path("$LLVM_SRC_ROOT/"); + } 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. + --cppflags C preprocessor flags for files that include LLVM headers. + --cflags C compiler flags for files that include LLVM headers. + --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. + --host-target Target triple used to configure LLVM. + --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 target-specific entries + foreach my $target (@TARGETS_BUILT) { + # FIXME: Temporary, until we don't switch all targets + if (defined $NAME_MAP{$target.'asmprinter'}) { + $NAME_MAP{$target} = [$target.'info', + $target.'asmprinter', + $target.'codegen'] + } else { + $NAME_MAP{$target} = [$target.'info', + $NAME_MAP{$target}[0]] + } + + if (defined $NAME_MAP{$target.'asmparser'}) { + push @{$NAME_MAP{$target}},$target.'asmparser' + } + + if (defined $NAME_MAP{$target.'disassembler'}) { + push @{$NAME_MAP{$target}},$target.'disassembler' + } + } + + # Add virtual entries. + $NAME_MAP{'native'} = have_native_backend() ? [$ARCH] : []; + $NAME_MAP{'nativecodegen'} = have_native_backend() ? [$ARCH.'codegen'] : []; + $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__ |
