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# FindLibClang
#
# This module searches libclang and llvm-config, the llvm-config tool is used to
# get information about the installed llvm/clang package to compile LLVM based
# programs.
#
# It defines the following variables
#
# ``LIBCLANG_LLVM_CONFIG_EXECUTABLE``
# the llvm-config tool to get various information.
# ``LIBCLANG_LIBRARIES``
# the clang libraries to link against to use Clang/LLVM.
# ``LIBCLANG_LIBDIR``
# the directory where the clang libraries are located.
# ``LIBCLANG_FOUND``
# true if libclang was found
# ``LIBCLANG_VERSION_STRING``
# version number as a string
# ``LIBCLANG_CXXFLAGS``
# the compiler flags for files that include LLVM headers
#
#=============================================================================
# Copyright (C) 2011, 2012, 2013 Jan Erik Hanssen and Anders Bakken
# Copyright (C) 2015 Christian Schwarzgruber <c.schwarzgruber.cs@gmail.com>
#
# This file is part of RTags (http://rtags.net).
#
# RTags is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RTags is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with RTags. If not, see <http://www.gnu.org/licenses/>.
if (NOT LIBCLANG_ROOT_DIR)
set(LIBCLANG_ROOT_DIR $ENV{LIBCLANG_ROOT_DIR})
endif ()
if (NOT LIBCLANG_LLVM_CONFIG_EXECUTABLE)
set(LIBCLANG_LLVM_CONFIG_EXECUTABLE $ENV{LIBCLANG_LLVM_CONFIG_EXECUTABLE})
if (NOT LIBCLANG_LLVM_CONFIG_EXECUTABLE)
if (APPLE)
foreach(major RANGE 9 3)
foreach(minor RANGE 9 0)
foreach(patch RANGE 9 0)
message(STATUS "trying llvm-config llvm-config${major}${minor} in /usr/local/Cellar/llvm/${major}.${minor}.${patch}/bin")
find_program(LIBCLANG_LLVM_CONFIG_EXECUTABLE NAMES llvm-config llvm-config${major}${minor} llvm-config-${major}${minor} llvm-config-${major} llvm-config${major} PATHS /usr/local/Cellar/llvm/${major}.${minor}.${patch}/bin)
if (LIBCLANG_LLVM_CONFIG_EXECUTABLE)
break()
endif ()
endforeach ()
if (LIBCLANG_LLVM_CONFIG_EXECUTABLE)
break()
endif ()
endforeach ()
if (LIBCLANG_LLVM_CONFIG_EXECUTABLE)
break()
endif ()
endforeach ()
else ()
set(llvm_config_names llvm-config)
foreach(major RANGE 9 3)
list(APPEND llvm_config_names "llvm-config${major}" "llvm-config-${major}")
foreach(minor RANGE 9 0)
list(APPEND llvm_config_names "llvm-config${major}${minor}" "llvm-config-${major}.${minor}" "llvm-config-mp-${major}.${minor}")
endforeach ()
endforeach ()
find_program(LIBCLANG_LLVM_CONFIG_EXECUTABLE NAMES ${llvm_config_names})
endif ()
endif ()
if (LIBCLANG_LLVM_CONFIG_EXECUTABLE)
message(STATUS "llvm-config executable found: ${LIBCLANG_LLVM_CONFIG_EXECUTABLE}")
endif ()
endif ()
if (NOT LIBCLANG_CXXFLAGS)
if (NOT LIBCLANG_LLVM_CONFIG_EXECUTABLE)
message(FATAL_ERROR "Could NOT find llvm-config executable and LIBCLANG_CXXFLAGS is not set ")
endif ()
execute_process(COMMAND ${LIBCLANG_LLVM_CONFIG_EXECUTABLE} --cxxflags OUTPUT_VARIABLE LIBCLANG_CXXFLAGS OUTPUT_STRIP_TRAILING_WHITESPACE)
if (NOT LIBCLANG_CXXFLAGS)
find_path(LIBCLANG_CXXFLAGS_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT clang-c/Index.h HINTS ${LIBCLANG_ROOT_DIR}/include NO_DEFAULT_PATH)
if (NOT EXISTS ${LIBCLANG_CXXFLAGS_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT})
find_path(LIBCLANG_CXXFLAGS clang-c/Index.h)
if (NOT EXISTS ${LIBCLANG_CXXFLAGS})
message(FATAL_ERROR "Could NOT find clang include path. You can fix this by setting LIBCLANG_CXXFLAGS in your shell or as a cmake variable.")
endif ()
else ()
set(LIBCLANG_CXXFLAGS ${LIBCLANG_CXXFLAGS_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT})
endif ()
set(LIBCLANG_CXXFLAGS "-I${LIBCLANG_CXXFLAGS}")
endif ()
string(REGEX MATCHALL "-(D__?[a-zA-Z_]*|I([^\" ]+|\"[^\"]+\"))" LIBCLANG_CXXFLAGS "${LIBCLANG_CXXFLAGS}")
string(REGEX REPLACE ";" " " LIBCLANG_CXXFLAGS "${LIBCLANG_CXXFLAGS}")
set(LIBCLANG_CXXFLAGS ${LIBCLANG_CXXFLAGS} CACHE STRING "The LLVM C++ compiler flags needed to compile LLVM based applications.")
unset(LIBCLANG_CXXFLAGS_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT CACHE)
endif ()
if (NOT EXISTS ${LIBCLANG_LIBDIR})
if (NOT LIBCLANG_LLVM_CONFIG_EXECUTABLE)
message(FATAL_ERROR "Could NOT find llvm-config executable and LIBCLANG_LIBDIR is not set ")
endif ()
execute_process(COMMAND ${LIBCLANG_LLVM_CONFIG_EXECUTABLE} --libdir OUTPUT_VARIABLE LIBCLANG_LIBDIR OUTPUT_STRIP_TRAILING_WHITESPACE)
if (NOT EXISTS ${LIBCLANG_LIBDIR})
message(FATAL_ERROR "Could NOT find clang libdir. You can fix this by setting LIBCLANG_LIBDIR in your shell or as a cmake variable.")
endif ()
set(LIBCLANG_LIBDIR ${LIBCLANG_LIBDIR} CACHE STRING "Path to the clang library.")
endif ()
if (NOT LIBCLANG_LIBRARIES)
find_library(LIBCLANG_LIB_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT NAMES clang libclang HINTS ${LIBCLANG_LIBDIR} ${LIBCLANG_ROOT_DIR}/lib NO_DEFAULT_PATH)
if (LIBCLANG_LIB_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT)
set(LIBCLANG_LIBRARIES "${LIBCLANG_LIB_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT}")
else ()
find_library(LIBCLANG_LIBRARIES NAMES clang libclang)
if (NOT EXISTS ${LIBCLANG_LIBRARIES})
set (LIBCLANG_LIBRARIES "-L${LIBCLANG_LIBDIR}" "-lclang" "${LIBCLANG_LIBDIR}")
endif ()
endif ()
unset(LIBCLANG_LIB_HACK_CMAKECACHE_DOT_TEXT_BULLSHIT CACHE)
endif ()
set(LIBCLANG_LIBRARY ${LIBCLANG_LIBRARIES} CACHE FILEPATH "Path to the libclang library")
if (LIBCLANG_LLVM_CONFIG_EXECUTABLE)
execute_process(COMMAND ${LIBCLANG_LLVM_CONFIG_EXECUTABLE} --version OUTPUT_VARIABLE LIBCLANG_VERSION_STRING OUTPUT_STRIP_TRAILING_WHITESPACE)
else ()
set(LIBCLANG_VERSION_STRING "Unknown")
endif ()
message("-- Using Clang version ${LIBCLANG_VERSION_STRING} from ${LIBCLANG_LIBDIR} with CXXFLAGS ${LIBCLANG_CXXFLAGS}")
# Handly the QUIETLY and REQUIRED arguments and set LIBCLANG_FOUND to TRUE if all listed variables are TRUE
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LibClang DEFAULT_MSG LIBCLANG_LIBRARY LIBCLANG_CXXFLAGS LIBCLANG_LIBDIR)
mark_as_advanced(LIBCLANG_CXXFLAGS LIBCLANG_LIBRARY LIBCLANG_LLVM_CONFIG_EXECUTABLE LIBCLANG_LIBDIR)
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