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llvm-mirror/tools/llvm-config/Makefile
Andrew Wilkins e690f5b8b2 tools/llvm-config: improve shared library support
Summary:

This is a re-commit of r257003, which was reverted,
along with the fixes from http://reviews.llvm.org/D15986.

r252532 added support for reporting the monolithic library
when LLVM_BUILD_LLVM_DYLIB is used. This would only be done
if the individual components were not found, and the dynamic
library is found.

This diff extends this as follows:
 - If LLVM_LINK_LLVM_DYLIB is set, then prefer the shared
   library, even if all component libraries exist.
 - Two flags, --link-shared and --link-static are introduced
   to provide explicit guidance. If --link-shared is passed
   and the shared library does not exist, an error results.

Additionally, changed the expected shared library names from
(e.g.) LLVM-3.8.0 to LLVM-3.8. The former exists only in an
installation (and then only in CMake builds I think?), and not
in the build tree; this breaks usage of llvm-config during
builds, e.g. by llvm-go.

Reviewers: DiamondLovesYou, beanz

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D15986

llvm-svn: 258283
2016-01-20 04:03:09 +00:00

100 lines
3.4 KiB
Makefile

##===- 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
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} ${CXX.Flags}
# Override LIBS with TARGET's LIBS for cross compilation.
# FIXME: Host's llvm-config is not generated. It's for target's.
ifneq ($(TARGET_LIBS), )
LLVM_SYSTEM_LIBS := $(TARGET_LIBS)
else
LLVM_SYSTEM_LIBS := $(LIBS)
endif
ifneq ($(REQUIRES_RTTI), 1)
LLVM_HAS_RTTI := NO
else
LLVM_HAS_RTTI := YES
endif
LLVM_DYLIB_VERSION := $(LLVM_VERSION_MAJOR).$(LLVM_VERSION_MINOR)$(LLVM_VERSION_SUFFIX)
# 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_LIBDIR_SUFFIX@//' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_SYSTEM_LIBS@/$(subst /,\/,$(LLVM_SYSTEM_LIBS))/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_TARGETS_BUILT@/$(subst /,\/,$(TARGETS_TO_BUILD))/' \
>> temp.sed
$(if $(filter-out $(ENABLE_SHARED),0),\
$(Verb) $(ECHO) 's/@LLVM_BUILD_LLVM_DYLIB@/ON/',\
$(Verb) $(ECHO) 's/@LLVM_BUILD_LLVM_DYLIB@/OFF/') \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_ENABLE_SHARED@/OFF/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_DYLIB_COMPONENTS@/all/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_BUILD_SYSTEM@/autoconf/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_HAS_RTTI@/$(LLVM_HAS_RTTI)/' \
>> temp.sed
$(Verb) $(ECHO) 's/@LLVM_DYLIB_VERSION@/$(LLVM_DYLIB_VERSION)/' \
>> temp.sed
$(Verb) $(SED) -f temp.sed < $< > $@
$(Verb) $(RM) temp.sed
# When cross-compiling, install a version of llvm-config that runs on the host.
ifeq ($(LLVM_CROSS_COMPILING),1)
install:: $(DESTDIR)$(PROJ_bindir)
$(Echo) Installing llvm-config-host
$(Verb) $(ProgInstall) $(BuildLLVMToolDir)/llvm-config \
$(DESTDIR)$(PROJ_bindir)/$(program_prefix)llvm-config-host
endif