[PATCH] autoconf: Build libClang-Version.so with --enable-shared

[Tom Stellard]

On Wed, Oct 15, 2014 at 02:19:28PM -0700, Eric Christopher wrote:
> No real objections, appears to be a bit of cut and paste from somewhere?
> 

It's mostly cut and paste from the llvm-shlib Makefile.  If you have any
suggestions for ways to share code between the two, I can look into it.
Usually, I get nervous about making major changes to the Makefiles,
because it seems like it is really easy to break things.

-Tom


> -eric
> 
> On Thu, Sep 18, 2014 at 6:07 PM, Tom Stellard <thomas.stellard at amd.com> wrote:
> > This patch just adds support for building and installing the shared
> > library.  All the tools still link against the static libraries.
> > ---
> >  tools/Makefile             |   4 ++
> >  tools/clang-shlib/Makefile | 116 +++++++++++++++++++++++++++++++++++++++++++++
> >  2 files changed, 120 insertions(+)
> >  create mode 100644 tools/clang-shlib/Makefile
> >
> > diff --git a/tools/Makefile b/tools/Makefile
> > index 2ee1299..55c19c3 100644
> > --- a/tools/Makefile
> > +++ b/tools/Makefile
> > @@ -23,6 +23,10 @@ ifeq ($(ENABLE_CLANG_ARCMT), 1)
> >    PARALLEL_DIRS += arcmt-test
> >  endif
> >
> > +ifeq ($(ENABLE_SHARED), 1)
> > +  DIRS += clang-shlib
> > +endif
> > +
> >  # Recurse into the extra repository of tools if present.
> >  OPTIONAL_PARALLEL_DIRS := extra
> >
> > diff --git a/tools/clang-shlib/Makefile b/tools/clang-shlib/Makefile
> > new file mode 100644
> > index 0000000..947259a
> > --- /dev/null
> > +++ b/tools/clang-shlib/Makefile
> > @@ -0,0 +1,116 @@
> > +##===- 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.
> > +#
> > +##===----------------------------------------------------------------------===##
> > +
> > +CLANG_LEVEL := ../../
> > +
> > +LIBRARYNAME = clang-$(LLVM_VERSION_MAJOR).$(LLVM_VERSION_MINOR)$(LLVM_VERSION_SUFFIX)
> > +LIBRARYALIASNAME = clang-$(LLVMVersion)
> > +
> > +NO_BUILD_ARCHIVE := 1
> > +LINK_LIBS_IN_SHARED := 1
> > +SHARED_LIBRARY := 1
> > +SHARED_ALIAS := 1
> > +
> > +include $(CLANG_LEVEL)/Makefile
> > +
> > +ifeq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
> > +  EXPORTED_SYMBOL_FILE = $(ObjDir)/$(LIBRARYNAME).exports
> > +
> > +  ifeq (1,$(ENABLE_EMBED_STDCXX))
> > +    # It is needed to force static-stdc++.a linked.
> > +    SHLIB_FRAG_NAMES += stdc++.a.o
> > +  endif
> > +
> > +endif
> > +
> > +# Include all archives in libclang.(so|dylib) except the ones that have
> > +# their own dynamic libraries and TableGen.
> > +Archives := $(wildcard $(LibDir)/libclang*.a)
> > +SharedLibraries := $(wildcard $(LibDir)/libclang*$(SHLIBEXT))
> > +IncludeInLibLlvm := $(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    := $(LLVMLibsOptions) -all_load
> > +endif
> > +
> > +ifeq ($(HOST_OS), $(filter $(HOST_OS), DragonFly Linux FreeBSD GNU/kFreeBSD OpenBSD GNU Bitrig))
> > +    # Include everything from the .a's into the shared library.
> > +    LLVMLibsOptions := -Wl,--whole-archive $(LLVMLibsOptions) \
> > +                       -Wl,--no-whole-archive
> > +endif
> > +
> > +ifeq ($(HOST_OS), $(filter $(HOST_OS), DragonFly Linux FreeBSD GNU/kFreeBSD GNU))
> > +    # Add soname to the library.
> > +    LLVMLibsOptions += -Wl,--soname,lib$(LIBRARYNAME)$(SHLIBEXT)
> > +endif
> > +
> > +ifeq ($(HOST_OS), $(filter $(HOST_OS), Linux GNU GNU/kFreeBSD))
> > +    # Don't allow unresolved symbols.
> > +    LLVMLibsOptions += -Wl,--no-undefined
> > +endif
> > +
> > +ifeq ($(HOST_OS),SunOS)
> > +    # add -z allextract ahead of other libraries on Solaris
> > +    LLVMLibsOptions := -Wl,-z -Wl,allextract $(LLVMLibsOptions)
> > +endif
> > +
> > +ifeq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
> > +
> > +SHLIB_STUBS := $(addprefix $(ObjDir)/, $(SHLIB_FRAG_NAMES))
> > +SHLIB_FRAGS := $(patsubst %.a.o, $(ObjDir)/%.syms.txt, $(LIBRARYNAME).a.o $(SHLIB_FRAG_NAMES))
> > +LLVMLibsOptions := $(SHLIB_STUBS) $(LLVMLibsOptions)
> > +
> > +$(LibName.SO): $(SHLIB_STUBS)
> > +
> > +%.syms.txt: %.a.o
> > +       $(Echo) Collecting global symbols of $(notdir $*)
> > +       $(Verb) $(NM_PATH) -g $< > $@
> > +
> > +$(ObjDir)/$(LIBRARYNAME).exports: $(SHLIB_FRAGS) $(ObjDir)/.dir
> > +       $(Echo) Generating exports for $(LIBRARYNAME)
> > +       $(Verb) ($(SED) -n \
> > +                       -e "s/^.* T _\([^.][^.]*\)$$/\1/p" \
> > +                       -e "s/^.* [BDR] _\([^.][^.]*\)$$/\1 DATA/p" \
> > +                       $(SHLIB_FRAGS) \
> > +                | sort -u) > $@
> > +
> > +$(ObjDir)/$(LIBRARYNAME).a.o: $(LLVMLibsPaths) $(ObjDir)/.dir
> > +       $(Echo) Linking all LLVMLibs together for $(LIBRARYNAME)
> > +       $(Verb) $(Link) -nostartfiles -Wl,-r -nodefaultlibs -o $@ \
> > +                       -Wl,--whole-archive $(LLVMLibsPaths) \
> > +                       -Wl,--no-whole-archive
> > +
> > +$(ObjDir)/stdc++.a.o: $(ObjDir)/.dir
> > +       $(Echo) Linking all libs together for static libstdc++.a
> > +       $(Verb) $(Link) -nostartfiles -Wl,-r -nodefaultlibs -o $@ \
> > +                       -Wl,--whole-archive -lstdc++ \
> > +                       -Wl,--no-whole-archive
> > +# FIXME: workaround to invalidate -lstdc++
> > +       $(Echo) Making dummy -lstdc++ to lib
> > +       $(Verb) $(AR) rc $(ToolDir)/libstdc++.dll.a
> > +# FIXME: Is install-local needed?
> > +
> > +clean-local::
> > +       $(Verb) $(RM) -f $(ToolDir)/libstdc++.dll.a
> > +
> > +endif
> > +
> > +LLVMLibsOptions += -lLLVM-$(LLVM_VERSION_MAJOR).$(LLVM_VERSION_MINOR)$(LLVM_VERSION_SUFFIX)
> > +
> > --
> > 1.8.1.5
> >
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