Revert r144300 "llvm-config: Replace with C++ version (was llvm-config-2).",

which didn't appear ready for prime time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144309 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2011-11-10 19:59:35 +00:00
parent 0ad62be9aa
commit 1ad92131ab
14 changed files with 938 additions and 69 deletions

View File

@ -230,7 +230,7 @@ endif()
set(LLVMBUILDTOOL "${LLVM_MAIN_SRC_DIR}/utils/llvm-build/llvm-build")
set(LLVMCONFIGLIBRARYDEPENDENCIESINC
"${LLVM_BINARY_DIR}/tools/llvm-config/LibraryDependencies.inc")
"${LLVM_BINARY_DIR}/tools/llvm-config-2/LibraryDependencies.inc")
set(LLVMBUILDCMAKEFRAG
"${LLVM_BINARY_DIR}/LLVMBuild.cmake")
message(STATUS "Constructing LLVMBuild project information")

View File

@ -10,12 +10,12 @@
LEVEL := .
# Top-Level LLVM Build Stages:
# 0. Execute llvm-build, to construct llvm-config library dependencies.
# 1. Build lib/Support and lib/TableGen, which are used by utils (tblgen).
# 2. Build utils, which is used by VMCore.
# 3. Build VMCore, which builds the Intrinsics.inc file used by libs.
# 4. Build llvm-config, which determines inter-lib dependencies for tools.
# 5. Build tools, runtime, docs.
# 4. Build libs, which are needed by llvm-config.
# 5. Build llvm-config, which determines inter-lib dependencies for tools.
# 6. Build tools, runtime, docs.
#
# When cross-compiling, there are some things (tablegen) that need to
# be build for the build system first.

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@ -79,7 +79,7 @@ LLVMBuildTool := $(PROJ_SRC_ROOT)/utils/llvm-build/llvm-build
# The files we are going to generate using llvm-build.
LLVMBuildMakeFrag := $(PROJ_OBJ_ROOT)/Makefile.llvmbuild
LLVMConfigLibraryDependenciesInc := \
$(PROJ_OBJ_ROOT)/tools/llvm-config/LibraryDependencies.inc
$(PROJ_OBJ_ROOT)/tools/llvm-config-2/LibraryDependencies.inc
# The rule to create the LLVMBuild Makefile fragment as well as the llvm-config
# library table.
@ -1006,16 +1006,11 @@ ifdef LINK_COMPONENTS
# If LLVM_CONFIG doesn't exist, build it. This can happen if you do a make
# clean in tools, then do a make in tools (instead of at the top level).
#
# We don't want these targets when actually building the LLVM_CONFIG tool
# itself, of course.
ifneq ($(TOOLNAME),llvm-config)
$(LLVM_CONFIG):
@echo "*** llvm-config doesn't exist - rebuilding it."
@$(MAKE) -C $(PROJ_OBJ_ROOT)/tools/llvm-config
$(ToolDir)/$(strip $(TOOLNAME))$(EXEEXT): $(LLVM_CONFIG)
endif
ifeq ($(ENABLE_SHARED), 1)
# We can take the "auto-import" feature to get rid of using dllimport.

2
configure vendored
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@ -21065,7 +21065,7 @@ if test -f ${srcdir}/tools/clang/README.txt; then
fi
ac_config_files="$ac_config_files tools/llvm-config/llvm-config.in"
ac_config_files="$ac_config_files bindings/ocaml/llvm/META.llvm"

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@ -11,9 +11,16 @@ if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/polly/CMakeLists.txt )
endif( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/polly/CMakeLists.txt )
if( NOT WIN32 OR MSYS OR CYGWIN )
# We currently require 'sed' to build llvm-config, so don't try to build it on
# pure Win32.
# It is useful to build llvm-config before the other tools, so we
# have a fresh LibDeps.txt for regenerating the hard-coded library
# dependencies. llvm-config/CMakeLists.txt takes care of this but we
# must keep llvm-config as the first entry on the list of tools to
# be built.
add_subdirectory(llvm-config)
# We currently require 'sed' to build llvm-config-2, so don't try to build it
# on pure Win32.
add_subdirectory(llvm-config-2)
endif()
add_subdirectory(opt)

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@ -34,7 +34,7 @@ PARALLEL_DIRS := opt llvm-as llvm-dis \
bugpoint llvm-bcanalyzer llvm-stub \
llvm-diff macho-dump llvm-objdump \
llvm-rtdyld llvm-dwarfdump llvm-cov \
llvm-size
llvm-size llvm-config-2
# Let users override the set of tools to build from the command line.
ifdef ONLY_TOOLS

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@ -0,0 +1,41 @@
set(LLVM_LINK_COMPONENTS support)
# We need to generate the BuildVariables.inc file containing values which are
# only defined when under certain build modes. Unfortunately, that precludes
# doing this inside CMake so we have to shell out to sed. For now, that means we
# can't expect to build llvm-config on Window.s
set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)
set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)
set(SEDSCRIPT_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.configure.sed)
# Compute the substitution values for various items.
get_system_libs(LLVM_SYSTEM_LIBS_LIST)
foreach(l ${LLVM_SYSTEM_LIBS_LIST})
set(SYSTEM_LIBS ${SYSTEM_LIBS} "-l${l}")
endforeach()
set(C_FLGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
set(CXX_FLGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
set(CPP_FLGS "${CMAKE_CPP_FLAGS} ${CMAKE_CPP_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
add_custom_command(OUTPUT ${BUILDVARIABLES_OBJPATH}
COMMAND echo s!@LLVM_SRC_ROOT@!${LLVM_MAIN_SRC_DIR}! > ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_OBJ_ROOT@!${LLVM_BINARY_DIR}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CPPFLAGS@!${CPP_FLGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CFLAGS@!${C_FLGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CXXFLAGS@!${CXX_FLGS}! >> ${SEDSCRIPT_OBJPATH}
# TODO: Use general flags for linking! not just for shared libs:
COMMAND echo s!@LLVM_LDFLAGS@!${CMAKE_SHARED_LINKER_FLAGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_BUILDMODE@!${CMAKE_BUILD_TYPE}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_SYSTEM_LIBS@!${SYSTEM_LIBS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND sed -f ${SEDSCRIPT_OBJPATH} < ${BUILDVARIABLES_SRCPATH} > ${BUILDVARIABLES_OBJPATH}
VERBATIM
COMMENT "Building BuildVariables.inc include."
)
# Add the llvm-config tool.
add_llvm_tool(llvm-config-2
llvm-config.cpp
)
# Add the dependency on the generation step.
add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})

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@ -0,0 +1,57 @@
##===- tools/llvm-config/Makefile---------------------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
LEVEL := ../..
TOOLNAME := llvm-config-2
USEDLIBS := LLVMSupport.a
# We generate sources in the build directory, make sure it is in the include
# paths.
INCLUDE_BUILD_DIR := 1
# This tool has no plugins, optimize startup time.
TOOL_NO_EXPORTS := 1
# Note that we have to use lazy expansion here.
BUILDVARIABLES_SRCPATH = $(PROJ_SRC_ROOT)/tools/$(TOOLNAME)/BuildVariables.inc.in
BUILDVARIABLES_OBJPATH = $(ObjDir)/BuildVariables.inc
BUILT_SOURCES = $(BUILDVARIABLES_OBJPATH)
include $(LEVEL)/Makefile.common
# Combine preprocessor flags (except for -I) and CXX flags.
SUB_CPPFLAGS := ${CPP.BaseFlags}
SUB_CFLAGS := ${CPP.BaseFlags} ${C.Flags}
SUB_CXXFLAGS := ${CPP.BaseFlags} ${CXX.Flags}
# This is blank for now. We need to be careful about adding stuff here:
# LDFLAGS tend not to be portable, and we don't currently require the
# user to use libtool when linking against LLVM.
SUB_LDFLAGS :=
$(ObjDir)/BuildVariables.inc: $(BUILDVARIABLES_SRCPATH) Makefile $(ObjDir)/.dir
$(Echo) "Building llvm-config BuildVariables.inc file."
$(Verb) $(ECHO) 's/@LLVM_SRC_ROOT@/$(subst /,\/,$(LLVM_SRC_ROOT))/' \
> temp.sed
$(Verb) $(ECHO) 's/@LLVM_OBJ_ROOT@/$(subst /,\/,$(LLVM_OBJ_ROOT))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_CPPFLAGS@/$(subst /,\/,$(SUB_CPPFLAGS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_CFLAGS@/$(subst /,\/,$(SUB_CFLAGS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_CXXFLAGS@/$(subst /,\/,$(SUB_CXXFLAGS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_LDFLAGS@/$(subst /,\/,$(SUB_LDFLAGS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_BUILDMODE@/$(subst /,\/,$(BuildMode))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_SYSTEM_LIBS@/$(subst /,\/,$(LIBS))/' \
>> temp.sed
$(Verb) $(SED) -f temp.sed < $< > $@
$(Verb) $(RM) temp.sed

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@ -1,41 +1,138 @@
set(LLVM_LINK_COMPONENTS support)
include(TestBigEndian)
# We need to generate the BuildVariables.inc file containing values which are
# only defined when under certain build modes. Unfortunately, that precludes
# doing this inside CMake so we have to shell out to sed. For now, that means we
# can't expect to build llvm-config on Window.s
set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)
set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)
set(SEDSCRIPT_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.configure.sed)
include(FindPerl)
if( NOT PERL_FOUND )
message(FATAL_ERROR "Perl required but not found!")
endif( NOT PERL_FOUND )
set(PERL ${PERL_EXECUTABLE})
set(VERSION PACKAGE_VERSION)
set(PREFIX ${CMAKE_INSTALL_PREFIX})
set(abs_top_srcdir ${LLVM_MAIN_SRC_DIR})
set(abs_top_builddir ${LLVM_BINARY_DIR})
execute_process(COMMAND date
OUTPUT_VARIABLE LLVM_CONFIGTIME
OUTPUT_STRIP_TRAILING_WHITESPACE)
# LLVM_ON_UNIX and LLVM_ON_WIN32 already set.
# those are set to blank by `autoconf' on MinGW, so it seems they are not required:
#set(LLVMGCCDIR "")
#set(LLVMGCC "")
#set(LLVMGXX "")
test_big_endian(IS_BIG_ENDIAN)
if( IS_BIG_ENDIAN )
set(ENDIAN "big")
else( IS_BIG_ENDIAN )
set(ENDIAN "little")
endif( IS_BIG_ENDIAN )
set(SHLIBEXT ${LTDL_SHLIB_EXT})
#EXEEXT already set.
set(OS "${CMAKE_SYSTEM}")
set(target "${TARGET_TRIPLE}")
set(ARCH "${LLVM_NATIVE_ARCH}")
# Compute the substitution values for various items.
get_system_libs(LLVM_SYSTEM_LIBS_LIST)
foreach(l ${LLVM_SYSTEM_LIBS_LIST})
set(SYSTEM_LIBS ${SYSTEM_LIBS} "-l${l}")
set(LLVM_SYSTEM_LIBS ${LLVM_SYSTEM_LIBS} "-l${l}")
endforeach()
foreach(c ${LLVM_TARGETS_TO_BUILD})
set(TARGETS_BUILT "${TARGETS_BUILT} ${c}")
endforeach(c)
set(TARGETS_TO_BUILD ${TARGETS_BUILT})
set(TARGET_HAS_JIT "1") # TODO
# Avoids replacement at config-time:
set(LLVM_CPPFLAGS "@LLVM_CPPFLAGS@")
set(LLVM_CFLAGS "@LLVM_CFLAGS@")
set(LLVM_CXXFLAGS "@LLVM_CXXFLAGS@")
set(LLVM_LDFLAGS "@LLVM_LDFLAGS@")
set(LIBS "@LIBS@")
set(LLVM_BUILDMODE "@LLVM_BUILDMODE@")
set(LLVM_OBJ_SUFFIX "@LLVM_OBJ_SUFFIX@")
configure_file(
${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.in.in
${CMAKE_CURRENT_BINARY_DIR}/llvm-config.in
@ONLY
)
set(LIBDEPS LibDeps.txt)
set(LIBDEPS_TMP LibDeps.txt.tmp)
set(FINAL_LIBDEPS FinalLibDeps.txt)
set(LLVM_CONFIG ${LLVM_TOOLS_BINARY_DIR}/llvm-config)
set(LLVM_CONFIG_IN ${CMAKE_CURRENT_BINARY_DIR}/llvm-config.in)
if( CMAKE_CROSSCOMPILING )
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
endif()
find_program(NM_PATH nm PATH_SUFFIXES /bin)
if( NOT NM_PATH )
message(FATAL_ERROR "`nm' not found")
endif()
get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
add_custom_command(OUTPUT ${LIBDEPS_TMP}
COMMAND ${PERL_EXECUTABLE} ${LLVM_MAIN_SRC_DIR}/utils/GenLibDeps.pl -flat ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}/${CMAKE_CFG_INTDIR} ${NM_PATH} > ${LIBDEPS_TMP}
DEPENDS ${llvm_libs}
COMMENT "Regenerating ${LIBDEPS_TMP}")
add_custom_command(OUTPUT ${LIBDEPS}
COMMAND ${CMAKE_COMMAND} -E copy_if_different ${LIBDEPS_TMP} ${LIBDEPS}
DEPENDS ${LIBDEPS_TMP}
COMMENT "Updating ${LIBDEPS} if necessary...")
# This must stop the build if find-cycles.pl returns error:
add_custom_command(OUTPUT ${FINAL_LIBDEPS}
COMMAND ${CMAKE_COMMAND} -E remove -f ${FINAL_LIBDEPS} ${FINAL_LIBDEPS}.tmp
COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/find-cycles.pl < ${LIBDEPS} > ${FINAL_LIBDEPS}.tmp
COMMAND ${CMAKE_COMMAND} -E copy ${FINAL_LIBDEPS}.tmp ${FINAL_LIBDEPS}
DEPENDS ${LIBDEPS}
COMMENT "Checking for cyclic dependencies between LLVM libraries.")
set(C_FLGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
set(CXX_FLGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
set(CPP_FLGS "${CMAKE_CPP_FLAGS} ${CMAKE_CPP_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
add_custom_command(OUTPUT ${BUILDVARIABLES_OBJPATH}
COMMAND echo s!@LLVM_SRC_ROOT@!${LLVM_MAIN_SRC_DIR}! > ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_OBJ_ROOT@!${LLVM_BINARY_DIR}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CPPFLAGS@!${CPP_FLGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CFLAGS@!${C_FLGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_CXXFLAGS@!${CXX_FLGS}! >> ${SEDSCRIPT_OBJPATH}
# We don't want certain flags on the output of
# llvm-config --cflags --cxxflags
macro(remove_option_from_llvm_config option)
llvm_replace_compiler_option(C_FLGS "${option}" "")
llvm_replace_compiler_option(CXX_FLGS "${option}" "")
llvm_replace_compiler_option(CPP_FLGS "${option}" "")
endmacro(remove_option_from_llvm_config)
remove_option_from_llvm_config("-pedantic")
remove_option_from_llvm_config("-Wall")
remove_option_from_llvm_config("-W")
add_custom_command(OUTPUT ${LLVM_CONFIG}
COMMAND echo s!@LLVM_CPPFLAGS@!${CPP_FLGS}! > temp.sed
COMMAND echo s!@LLVM_CFLAGS@!${C_FLGS}! >> temp.sed
COMMAND echo s!@LLVM_CXXFLAGS@!${CXX_FLGS}! >> temp.sed
# TODO: Use general flags for linking! not just for shared libs:
COMMAND echo s!@LLVM_LDFLAGS@!${CMAKE_SHARED_LINKER_FLAGS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_BUILDMODE@!${CMAKE_BUILD_TYPE}! >> ${SEDSCRIPT_OBJPATH}
COMMAND echo s!@LLVM_SYSTEM_LIBS@!${SYSTEM_LIBS}! >> ${SEDSCRIPT_OBJPATH}
COMMAND sed -f ${SEDSCRIPT_OBJPATH} < ${BUILDVARIABLES_SRCPATH} > ${BUILDVARIABLES_OBJPATH}
COMMAND echo s!@LLVM_LDFLAGS@!${CMAKE_SHARED_LINKER_FLAGS}! >> temp.sed
COMMAND echo s!@LIBS@!${LLVM_SYSTEM_LIBS}! >> temp.sed
COMMAND echo s!@LLVM_BUILDMODE@!${CMAKE_BUILD_TYPE}! >> temp.sed
COMMAND echo s!@LLVM_OBJ_SUFFIX@!! >> temp.sed
COMMAND sed -f temp.sed < ${LLVM_CONFIG_IN} > ${LLVM_CONFIG}
COMMAND ${CMAKE_COMMAND} -E remove -f temp.sed
COMMAND cat ${FINAL_LIBDEPS} >> ${LLVM_CONFIG}
COMMAND chmod +x ${LLVM_CONFIG}
VERBATIM
COMMENT "Building BuildVariables.inc include."
DEPENDS ${FINAL_LIBDEPS} ${LLVM_CONFIG_IN}
COMMENT "Building llvm-config script."
)
# Add the llvm-config tool.
add_llvm_tool(llvm-config
llvm-config.cpp
)
add_custom_target(llvm-config.target ALL
DEPENDS ${LLVM_CONFIG})
# Add the dependency on the generation step.
add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})
# Ensure we build llvm-config after we build all of the libraries so that we
# have their full dependencies.
add_dependencies(llvm-config.target ${llvm_libs})
install(FILES ${LLVM_CONFIG}
PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE
WORLD_READ WORLD_EXECUTE
DESTINATION bin)

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@ -1,5 +1,5 @@
##===- tools/llvm-config/Makefile---------------------------*- Makefile -*-===##
#
##===- tools/llvm-config/Makefile --------------------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
@ -7,42 +7,57 @@
#
##===----------------------------------------------------------------------===##
LEVEL := ../..
TOOLNAME := llvm-config
USEDLIBS := LLVMSupport.a
LEVEL = ../..
# We generate sources in the build directory, make sure it is in the include
# paths.
INCLUDE_BUILD_DIR := 1
# This tool has no plugins, optimize startup time.
TOOL_NO_EXPORTS := 1
# Note that we have to use lazy expansion here.
BUILDVARIABLES_SRCPATH = $(PROJ_SRC_ROOT)/tools/$(TOOLNAME)/BuildVariables.inc.in
BUILDVARIABLES_OBJPATH = $(ObjDir)/BuildVariables.inc
BUILT_SOURCES = $(BUILDVARIABLES_OBJPATH)
EXTRA_DIST = LibDeps.txt FinalLibDeps.txt llvm-config.in.in find-cycles.pl
include $(LEVEL)/Makefile.common
# If we don't have Perl, we can't generate the library dependencies upon which
# llvm-config depends. Therefore, only if we detect perl will we do anything
# useful.
ifeq ($(HAVE_PERL),1)
# Combine preprocessor flags (except for -I) and CXX flags.
SUB_CPPFLAGS := ${CPP.BaseFlags}
SUB_CFLAGS := ${CPP.BaseFlags} ${C.Flags}
SUB_CXXFLAGS := ${CPP.BaseFlags} ${CXX.Flags}
SUB_CPPFLAGS = ${CPP.BaseFlags}
SUB_CFLAGS = ${CPP.BaseFlags} ${C.Flags}
SUB_CXXFLAGS = ${CPP.BaseFlags} ${CXX.Flags}
# This is blank for now. We need to be careful about adding stuff here:
# LDFLAGS tend not to be portable, and we don't currently require the
# user to use libtool when linking against LLVM.
SUB_LDFLAGS :=
SUB_LDFLAGS =
$(ObjDir)/BuildVariables.inc: $(BUILDVARIABLES_SRCPATH) Makefile $(ObjDir)/.dir
$(Echo) "Building llvm-config BuildVariables.inc file."
$(Verb) $(ECHO) 's/@LLVM_SRC_ROOT@/$(subst /,\/,$(LLVM_SRC_ROOT))/' \
> temp.sed
$(Verb) $(ECHO) 's/@LLVM_OBJ_ROOT@/$(subst /,\/,$(LLVM_OBJ_ROOT))/' \
>> temp.sed
FinalLibDeps = $(PROJ_OBJ_DIR)/FinalLibDeps.txt
LibDeps = $(PROJ_OBJ_DIR)/LibDeps.txt
LibDepsTemp = $(PROJ_OBJ_DIR)/LibDeps.txt.tmp
GenLibDeps = $(PROJ_SRC_ROOT)/utils/GenLibDeps.pl
$(LibDepsTemp): $(GenLibDeps) $(LibDir) $(wildcard $(LibDir)/*.a $(LibDir)/*.o)
$(Echo) "Regenerating LibDeps.txt.tmp"
$(Verb) $(PERL) $(GenLibDeps) -flat $(LibDir) "$(NM_PATH)" > $(LibDepsTemp)
$(LibDeps): $(LibDepsTemp)
$(Verb) $(CMP) -s $@ $< || ( $(CP) $< $@ && \
$(EchoCmd) Updated LibDeps.txt because dependencies changed )
# Find all the cyclic dependencies between various LLVM libraries, so we
# don't have to process them at runtime.
$(FinalLibDeps): find-cycles.pl $(LibDeps)
$(Echo) "Checking for cyclic dependencies between LLVM libraries."
$(Verb) $(PERL) $< < $(LibDeps) > $@ || rm -f $@
# Rerun our configure substitutions as needed.
ConfigInIn = $(PROJ_SRC_DIR)/llvm-config.in.in
llvm-config.in: $(ConfigInIn) $(ConfigStatusScript)
$(Verb) cd $(PROJ_OBJ_ROOT) ; \
$(ConfigStatusScript) tools/llvm-config/llvm-config.in
# Build our final script.
$(ToolDir)/llvm-config: llvm-config.in $(FinalLibDeps)
$(Echo) "Building llvm-config script."
$(Verb) $(ECHO) 's/@LLVM_CPPFLAGS@/$(subst /,\/,$(SUB_CPPFLAGS))/' \
>> temp.sed
> temp.sed
$(Verb) $(ECHO) 's/@LLVM_CFLAGS@/$(subst /,\/,$(SUB_CFLAGS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_CXXFLAGS@/$(subst /,\/,$(SUB_CXXFLAGS))/' \
@ -51,7 +66,28 @@ $(ObjDir)/BuildVariables.inc: $(BUILDVARIABLES_SRCPATH) Makefile $(ObjDir)/.dir
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_BUILDMODE@/$(subst /,\/,$(BuildMode))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_SYSTEM_LIBS@/$(subst /,\/,$(LIBS))/' \
$(Verb) $(ECHO) 's/@LLVM_OBJ_SUFFIX@/$(subst /,\/,/$(BuildMode))/' \
>> temp.sed
$(Verb) $(SED) -f temp.sed < $< > $@
$(Verb) $(RM) temp.sed
$(Verb) cat $(FinalLibDeps) >> $@
$(Verb) chmod +x $@
else
# We don't have perl, just generate a dummy llvm-config
$(ToolDir)/llvm-config:
$(Echo) "Building place holder llvm-config script."
$(Verb) $(ECHO) 'echo llvm-config: Perl not found so llvm-config could not be generated' >> $@
$(Verb) chmod +x $@
endif
# Hook into the standard Makefile rules.
all-local:: $(ToolDir)/llvm-config
clean-local::
$(Verb) $(RM) -f $(ToolDir)/llvm-config llvm-config.in $(FinalLibDeps) \
$(LibDeps) GenLibDeps.out
install-local:: all-local
$(Echo) Installing llvm-config
$(Verb) $(MKDIR) $(DESTDIR)$(PROJ_bindir)
$(Verb) $(ScriptInstall) $(ToolDir)/llvm-config $(DESTDIR)$(PROJ_bindir)

170
tools/llvm-config/find-cycles.pl Executable file
View File

@ -0,0 +1,170 @@
#!/usr/bin/perl
#
# Program: find-cycles.pl
#
# Synopsis: Given a list of possibly cyclic dependencies, merge all the
# cycles. This makes it possible to topologically sort the
# dependencies between different parts of LLVM.
#
# Syntax: find-cycles.pl < LibDeps.txt > FinalLibDeps.txt
#
# Input: cycmem1: cycmem2 dep1 dep2
# cycmem2: cycmem1 dep3 dep4
# boring: dep4
#
# Output: cycmem1 cycmem2: dep1 dep2 dep3 dep4
# boring: dep4
#
# This file was written by Eric Kidd, and is placed into the public domain.
#
use 5.006;
use strict;
use warnings;
my %DEPS;
my @CYCLES;
sub find_all_cycles;
# Read our dependency information.
while (<>) {
chomp;
my ($module, $dependency_str) = /^\s*([^:]+):\s*(.*)\s*$/;
die "Malformed data: $_" unless defined $dependency_str;
my @dependencies = split(/ /, $dependency_str);
$DEPS{$module} = \@dependencies;
}
# Partition our raw dependencies into sets of cyclically-connected nodes.
find_all_cycles();
# Print out the finished cycles, with their dependencies.
my @output;
my $cycles_found = 0;
foreach my $cycle (@CYCLES) {
my @modules = sort keys %{$cycle};
# Merge the dependencies of all modules in this cycle.
my %dependencies;
foreach my $module (@modules) {
@dependencies{@{$DEPS{$module}}} = 1;
}
# Prune the known cyclic dependencies.
foreach my $module (@modules) {
delete $dependencies{$module};
}
# Warn about possible linker problems.
my @archives = grep(/\.a$/, @modules);
if (@archives > 1) {
$cycles_found = $cycles_found + 1;
print STDERR "find-cycles.pl: Circular dependency between *.a files:\n";
print STDERR "find-cycles.pl: ", join(' ', @archives), "\n";
push @modules, @archives; # WORKAROUND: Duplicate *.a files. Ick.
} elsif (@modules > 1) {
$cycles_found = $cycles_found + 1;
print STDERR "find-cycles.pl: Circular dependency between *.o files:\n";
print STDERR "find-cycles.pl: ", join(' ', @modules), "\n";
push @modules, @modules; # WORKAROUND: Duplicate *.o files. Ick.
}
# Add to our output. (@modules is already as sorted as we need it to be.)
push @output, (join(' ', @modules) . ': ' .
join(' ', sort keys %dependencies) . "\n");
}
print sort @output;
exit $cycles_found;
#==========================================================================
# Depedency Cycle Support
#==========================================================================
# For now, we have cycles in our dependency graph. Ideally, each cycle
# would be collapsed down to a single *.a file, saving us all this work.
#
# To understand this code, you'll need a working knowledge of Perl 5,
# and possibly some quality time with 'man perlref'.
my %SEEN;
my %CYCLES;
sub find_cycles ($@);
sub found_cycles ($@);
sub find_all_cycles {
# Find all multi-item cycles.
my @modules = sort keys %DEPS;
foreach my $module (@modules) { find_cycles($module); }
# Build fake one-item "cycles" for the remaining modules, so we can
# treat them uniformly.
foreach my $module (@modules) {
unless (defined $CYCLES{$module}) {
my %cycle = ($module, 1);
$CYCLES{$module} = \%cycle;
}
}
# Find all our unique cycles. We have to do this the hard way because
# we apparently can't store hash references as hash keys without making
# 'strict refs' sad.
my %seen;
foreach my $cycle (values %CYCLES) {
unless ($seen{$cycle}) {
$seen{$cycle} = 1;
push @CYCLES, $cycle;
}
}
}
# Walk through our graph depth-first (keeping a trail in @path), and report
# any cycles we find.
sub find_cycles ($@) {
my ($module, @path) = @_;
if (str_in_list($module, @path)) {
found_cycle($module, @path);
} else {
return if defined $SEEN{$module};
$SEEN{$module} = 1;
foreach my $dep (@{$DEPS{$module}}) {
find_cycles($dep, @path, $module);
}
}
}
# Give a cycle, attempt to merge it with pre-existing cycle data.
sub found_cycle ($@) {
my ($module, @path) = @_;
# Pop any modules which aren't part of our cycle.
while ($path[0] ne $module) { shift @path; }
#print join("->", @path, $module) . "\n";
# Collect the modules in our cycle into a hash.
my %cycle;
foreach my $item (@path) {
$cycle{$item} = 1;
if (defined $CYCLES{$item}) {
# Looks like we intersect with an existing cycle, so merge
# all those in, too.
foreach my $old_item (keys %{$CYCLES{$item}}) {
$cycle{$old_item} = 1;
}
}
}
# Update our global cycle table.
my $cycle_ref = \%cycle;
foreach my $item (keys %cycle) {
$CYCLES{$item} = $cycle_ref;
}
#print join(":", sort keys %cycle) . "\n";
}
sub str_in_list ($@) {
my ($str, @list) = @_;
foreach my $item (@list) {
return 1 if ($item eq $str);
}
return 0;
}

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@ -0,0 +1,466 @@
#!@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@};
my $LLVM_OBJ_SUFFIX = q{@LLVM_OBJ_SUFFIX@};
#---- end Makefile values ----
# Figure out where llvm-config is being run from. Primarily, we care if it has
# been installed, or is running from the build directory, which changes the
# locations of some files.
# Convert the current executable name into its directory (e.g. ".").
my ($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_OBJ_SUFFIX";
$ABS_OBJ_ROOT = abs_path("$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).
engine Either a native JIT or a bitcode 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
my @all_targets;
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']
} elsif (defined $NAME_MAP{$target.'codegen'}) {
$NAME_MAP{$target} = [$target.'info',
$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'
}
push @all_targets, $target;
}
# Add virtual entries.
$NAME_MAP{'native'} = have_native_backend() ? [$ARCH] : [];
$NAME_MAP{'nativecodegen'} = have_native_backend() ? [$ARCH.'codegen'] : [];
$NAME_MAP{'engine'} = find_best_engine;
$NAME_MAP{'all-targets'} = \@all_targets;
$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__