Add a shared library for LLVM, named libLLVM2.7svn.(so|dylib), and add an
--enable-shared configure flag to have the tools linked shared. (2.7svn is just
$(LLVMVersion) so it'll change to "2.7" in the release.) Always link the
example programs shared to test that the shared library keeps working.
On my mac laptop, Debug libLLVM2.7svn.dylib is 39MB, and opt (for example) is
16M static vs 440K shared.
Two things are less than ideal here:
1) The library doesn't include any version information. Since we expect to break
the ABI with every release, this shouldn't be much of a problem. If we do
release a compatible 2.7.1, we may be able to hack its library to work with
binaries compiled against 2.7.0, or we can just ask them to recompile. I'm
hoping to get a real packaging expert to look at this for the 2.8 release.
2) llvm-config doesn't yet have an option to print link options for the shared
library. I'll add this as a subsequent patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96559 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile b/Makefile
index 319bdcd..1819226 100644
--- a/Makefile
+++ b/Makefile
@@ -30,8 +30,8 @@
DIRS := lib/System lib/Support utils
OPTIONAL_DIRS :=
else
- DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-config \
- tools runtime docs unittests
+ DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-shlib \
+ tools/llvm-config tools runtime docs unittests
OPTIONAL_DIRS := projects bindings
endif
diff --git a/Makefile.config.in b/Makefile.config.in
index 2cc69dc..5489b2b 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -266,6 +266,9 @@
# Do we want to build with position independent code?
ENABLE_PIC := @ENABLE_PIC@
+# Do we want to link the tools shared?
+ENABLE_SHARED := @ENABLE_SHARED@
+
# Use -fvisibility-inlines-hidden?
ENABLE_VISIBILITY_INLINES_HIDDEN := @ENABLE_VISIBILITY_INLINES_HIDDEN@
@@ -276,6 +279,9 @@
# Enable JIT for this platform
TARGET_HAS_JIT = @TARGET_HAS_JIT@
+# Environment variable to set to change the runtime shared library search path.
+SHLIBPATH_VAR = @SHLIBPATH_VAR@
+
# Shared library extension for host platform.
SHLIBEXT = @SHLIBEXT@
diff --git a/Makefile.rules b/Makefile.rules
index 761cc81..8cabd0b 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -613,11 +613,12 @@
ifneq ($(HOST_OS),Darwin)
ifneq ($(DARWIN_MAJVERS),4)
ifdef TOOLNAME
-ifdef EXAMPLE_TOOL
- LD.Flags += $(RPATH) -Wl,$(ExmplDir) $(RDYNAMIC)
-else
- LD.Flags += $(RPATH) -Wl,$(ToolDir) $(RDYNAMIC)
-endif
+ LD.Flags += $(RPATH) -Wl,'$$ORIGIN/../lib'
+ ifdef EXAMPLE_TOOL
+ LD.Flags += $(RPATH) -Wl,$(ExmplDir) $(RDYNAMIC)
+ else
+ LD.Flags += $(RPATH) -Wl,$(ToolDir) $(RDYNAMIC)
+ endif
endif
endif
endif
@@ -952,11 +953,21 @@
$(ToolDir)/$(strip $(TOOLNAME))$(EXEEXT): $(LLVM_CONFIG)
+ifeq ($(ENABLE_SHARED), 1)
+LLVMLibsOptions += -lLLVM$(LLVMVersion)
+LLVMLibsPaths += $(LibDir)/libLLVM$(LLVMVersion)$(SHLIBEXT)
+else
+ifeq ($(EXAMPLE_TOOL), 1)
+LLVMLibsOptions += -lLLVM$(LLVMVersion)
+LLVMLibsPaths += $(LibDir)/libLLVM$(LLVMVersion)$(SHLIBEXT)
+else
LLVMLibsOptions += $(shell $(LLVM_CONFIG) --libs $(LINK_COMPONENTS))
LLVMLibsPaths += $(LLVM_CONFIG) \
$(shell $(LLVM_CONFIG) --libfiles $(LINK_COMPONENTS))
endif
endif
+endif
+endif
###############################################################################
# Library Build Rules: Four ways to build a library
@@ -1162,11 +1173,13 @@
# If neither BUILD_ARCHIVE or LOADABLE_MODULE are specified, default to
# building an archive.
#---------------------------------------------------------
+ifndef NO_BUILD_ARCHIVE
ifndef BUILD_ARCHIVE
ifndef LOADABLE_MODULE
BUILD_ARCHIVE = 1
endif
endif
+endif
#---------------------------------------------------------
# Archive Library Targets:
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 40f77d8..01ba197 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -470,6 +470,18 @@
AC_DEFINE_UNQUOTED([ENABLE_PIC],$ENABLE_PIC,
[Define if position independent code is enabled])
+dnl Allow linking tools against the shared library.
+AC_ARG_ENABLE(shared,
+ AS_HELP_STRING([--enable-shared],
+ [Link LLVM tools shared (default is NO)]),,
+ enableval=default)
+case "$enableval" in
+ yes) AC_SUBST(ENABLE_SHARED,[1]) ;;
+ no) AC_SUBST(ENABLE_SHARED,[0]) ;;
+ default) AC_SUBST(ENABLE_SHARED,[0]) ;;
+ *) AC_MSG_ERROR([Invalid setting for --enable-shared. Use "yes" or "no"]) ;;
+esac
+
dnl Allow specific targets to be specified for building (or not)
TARGETS_TO_BUILD=""
AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets],
@@ -1265,6 +1277,10 @@
dnl the Makefiles so we can use it there too
AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext)
+dnl Propagate the run-time library path variable that the libltdl
+dnl checks found to the Makefiles so we can use it there too
+AC_SUBST(SHLIBPATH_VAR,$libltdl_cv_shlibpath_var)
+
# Translate the various configuration directories and other basic
# information into substitutions that will end up in Makefile.config.in
# that these configured values can be used by the makefiles
diff --git a/configure b/configure
index 88050f3..719c1b7 100755
--- a/configure
+++ b/configure
@@ -689,6 +689,7 @@
ENABLE_DOXYGEN
ENABLE_THREADS
ENABLE_PIC
+ENABLE_SHARED
TARGETS_TO_BUILD
LLVM_ENUM_TARGETS
LLVM_ENUM_ASM_PRINTERS
@@ -769,6 +770,7 @@
LLVMGCC_MAJVERS
LLVMGCC_LANGS
SHLIBEXT
+SHLIBPATH_VAR
LLVM_PREFIX
LLVM_BINDIR
LLVM_LIBDIR
@@ -1401,6 +1403,7 @@
--enable-threads Use threads if available (default is YES)
--enable-pic Build LLVM with Position Independent Code (default
is YES)
+ --enable-shared Link LLVM tools shared (default is NO)
--enable-targets Build specific host targets: all or
target1,target2,... Valid targets are: host, x86,
x86_64, sparc, powerpc, alpha, arm, mips, spu,
@@ -4857,6 +4860,25 @@
_ACEOF
+# Check whether --enable-shared was given.
+if test "${enable_shared+set}" = set; then
+ enableval=$enable_shared;
+else
+ enableval=default
+fi
+
+case "$enableval" in
+ yes) ENABLE_SHARED=1
+ ;;
+ no) ENABLE_SHARED=0
+ ;;
+ default) ENABLE_SHARED=0
+ ;;
+ *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-shared. Use \"yes\" or \"no\"" >&5
+echo "$as_me: error: Invalid setting for --enable-shared. Use \"yes\" or \"no\"" >&2;}
+ { (exit 1); exit 1; }; } ;;
+esac
+
TARGETS_TO_BUILD=""
# Check whether --enable-targets was given.
if test "${enable_targets+set}" = set; then
@@ -11035,7 +11057,7 @@
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<EOF
-#line 11038 "configure"
+#line 11060 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -19595,6 +19617,9 @@
SHLIBEXT=$libltdl_cv_shlibext
+SHLIBPATH_VAR=$libltdl_cv_shlibpath_var
+
+
# Translate the various configuration directories and other basic
# information into substitutions that will end up in Makefile.config.in
# that these configured values can be used by the makefiles
@@ -20652,6 +20677,7 @@
ENABLE_DOXYGEN!$ENABLE_DOXYGEN$ac_delim
ENABLE_THREADS!$ENABLE_THREADS$ac_delim
ENABLE_PIC!$ENABLE_PIC$ac_delim
+ENABLE_SHARED!$ENABLE_SHARED$ac_delim
TARGETS_TO_BUILD!$TARGETS_TO_BUILD$ac_delim
LLVM_ENUM_TARGETS!$LLVM_ENUM_TARGETS$ac_delim
LLVM_ENUM_ASM_PRINTERS!$LLVM_ENUM_ASM_PRINTERS$ac_delim
@@ -20661,7 +20687,6 @@
OPTIMIZE_OPTION!$OPTIMIZE_OPTION$ac_delim
EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
BINUTILS_INCDIR!$BINUTILS_INCDIR$ac_delim
-ENABLE_LLVMC_DYNAMIC!$ENABLE_LLVMC_DYNAMIC$ac_delim
_ACEOF
if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -20703,6 +20728,7 @@
ac_delim='%!_!# '
for ac_last_try in false false false false false :; do
cat >conf$$subs.sed <<_ACEOF
+ENABLE_LLVMC_DYNAMIC!$ENABLE_LLVMC_DYNAMIC$ac_delim
ENABLE_LLVMC_DYNAMIC_PLUGINS!$ENABLE_LLVMC_DYNAMIC_PLUGINS$ac_delim
CXX!$CXX$ac_delim
CXXFLAGS!$CXXFLAGS$ac_delim
@@ -20773,6 +20799,7 @@
LLVMGCC_MAJVERS!$LLVMGCC_MAJVERS$ac_delim
LLVMGCC_LANGS!$LLVMGCC_LANGS$ac_delim
SHLIBEXT!$SHLIBEXT$ac_delim
+SHLIBPATH_VAR!$SHLIBPATH_VAR$ac_delim
LLVM_PREFIX!$LLVM_PREFIX$ac_delim
LLVM_BINDIR!$LLVM_BINDIR$ac_delim
LLVM_LIBDIR!$LLVM_LIBDIR$ac_delim
@@ -20793,7 +20820,7 @@
LTLIBOBJS!$LTLIBOBJS$ac_delim
_ACEOF
- if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 88; then
+ if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 90; then
break
elif $ac_last_try; then
{ { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
diff --git a/test/Makefile b/test/Makefile
index e7776f8..5554053 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -200,4 +200,6 @@
-e "s#@LLVM_TOOLS_DIR@#$(ToolDir)#g" \
-e "s#@LLVMGCCDIR@#$(LLVMGCCDIR)#g" \
-e "s#@LLVM_BUILD_MODE@#$(BuildMode)#g" \
+ -e "s#@ENABLE_SHARED@#$(ENABLE_SHARED)#g" \
+ -e "s#@SHLIBPATH_VAR@#$(SHLIBPATH_VAR)#g" \
$(PROJ_SRC_DIR)/Unit/lit.site.cfg.in > $@
diff --git a/test/Unit/lit.cfg b/test/Unit/lit.cfg
index 34372bb..5fe0732 100644
--- a/test/Unit/lit.cfg
+++ b/test/Unit/lit.cfg
@@ -23,7 +23,14 @@
###
-import os
+# If necessary, point the dynamic loader at libLLVM.so.
+if config.enable_shared:
+ libdir = os.path.join(config.llvm_obj_root, config.llvm_build_mode, 'lib')
+ shlibpath = config.environment.get(config.shlibpath_var,'')
+ if shlibpath:
+ shlibpath = ':' + shlibpath
+ shlibpath = libdir + shlibpath
+ config.environment[config.shlibpath_var] = shlibpath
# Check that the object root is known.
if config.test_exec_root is None:
diff --git a/test/Unit/lit.site.cfg.in b/test/Unit/lit.site.cfg.in
index c190ffa..51b5bc4 100644
--- a/test/Unit/lit.site.cfg.in
+++ b/test/Unit/lit.site.cfg.in
@@ -5,6 +5,8 @@
config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
config.llvmgcc_dir = "@LLVMGCCDIR@"
config.llvm_build_mode = "@LLVM_BUILD_MODE@"
+config.enable_shared = @ENABLE_SHARED@
+config.shlibpath_var = "@SHLIBPATH_VAR@"
# Let the main config do the real work.
lit.load_config(config, "@LLVM_SOURCE_DIR@/test/Unit/lit.cfg")
diff --git a/tools/llvm-shlib/Makefile b/tools/llvm-shlib/Makefile
new file mode 100644
index 0000000..b2f725c
--- /dev/null
+++ b/tools/llvm-shlib/Makefile
@@ -0,0 +1,61 @@
+##===- tools/shlib/Makefile --------------------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+LIBRARYNAME = LLVM$(LLVMVersion)
+
+NO_BUILD_ARCHIVE = 1
+LINK_LIBS_IN_SHARED = 1
+SHARED_LIBRARY = 1
+
+include $(LEVEL)/Makefile.common
+
+# Include all archives in libLLVM.(so|dylib) except the ones that have
+# their own dynamic libraries.
+Archives := $(wildcard $(LibDir)/libLLVM*.a)
+SharedLibraries := $(wildcard $(LibDir)/libLLVM*$(SHLIBEXT))
+IncludeInLibLlvm := $(filter-out $(basename $(SharedLibraries)).a, $(Archives))
+LLVMLibsOptions := $(IncludeInLibLlvm:$(LibDir)/lib%.a=-l%)
+LLVMLibsPaths := $(IncludeInLibLlvm)
+
+$(LibName.SO): $(LLVMLibsPaths)
+
+ifeq ($(HOST_OS),Darwin)
+ # set dylib internal version number to llvmCore submission number
+ ifdef LLVM_SUBMIT_VERSION
+ LLVMLibsOptions := $(LLVMLibsOptions) -Wl,-current_version \
+ -Wl,$(LLVM_SUBMIT_VERSION).$(LLVM_SUBMIT_SUBVERSION) \
+ -Wl,-compatibility_version -Wl,1
+ endif
+ # Include everything from the .a's into the shared library.
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -Wl,-all_load
+ # extra options to override libtool defaults
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -avoid-version \
+ -Wl,-dead_strip \
+ -Wl,-seg1addr -Wl,0xE0000000
+
+ # Mac OS X 10.4 and earlier tools do not allow a second -install_name on command line
+ DARWIN_VERS := $(shell echo $(TARGET_TRIPLE) | sed 's/.*darwin\([0-9]*\).*/\1/')
+ ifneq ($(DARWIN_VERS),8)
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -Wl,-install_name \
+ -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)"
+ endif
+endif
+
+ifeq ($(HOST_OS), Linux)
+ # Include everything from the .a's into the shared library.
+ LLVMLibsOptions := -Wl,--whole-archive $(LLVMLibsOptions) \
+ -Wl,--no-whole-archive
+ # Don't allow unresolved symbols, and warn if we'll need to modify
+ # the text segment when loading libLLVM.so.
+ LLVMLibsOptions += -Wl,--no-undefined,--warn-shared-textrel
+endif
diff --git a/unittests/Makefile.unittest b/unittests/Makefile.unittest
index 6fbef54..5094a7e 100644
--- a/unittests/Makefile.unittest
+++ b/unittests/Makefile.unittest
@@ -28,6 +28,10 @@
CPP.Flags += $(NO_VARIADIC_MACROS)
TESTLIBS = -lGoogleTest -lUnitTestMain
+ifeq ($(ENABLE_SHARED), 1)
+Run.Shared := $(SHLIBPATH_VAR)="$(LibDir)$${$(SHLIBPATH_VAR):+:}$$$(SHLIBPATH_VAR)"
+endif
+
$(LLVMUnitTestExe): $(ObjectsO) $(ProjLibsPaths) $(LLVMLibsPaths)
$(Echo) Linking $(BuildMode) unit test $(TESTNAME) $(StripWarnMsg)
$(Verb) $(Link) -o $@ $(TOOLLINKOPTS) $(ObjectsO) $(ProjLibsOptions) \
@@ -38,6 +42,6 @@
all:: $(LLVMUnitTestExe)
unitcheck:: $(LLVMUnitTestExe)
- $(LLVMUnitTestExe)
+ $(Run.Shared) $(LLVMUnitTestExe)
endif