CMakeLists.txt

###############################################################################
##
## BSD 3-Clause License
##
## Copyright (c) 2019, Parallax Software, Inc.
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## * Redistributions of source code must retain the above copyright notice, this
##   list of conditions and the following disclaimer.
##
## * Redistributions in binary form must reproduce the above copyright notice,
##   this list of conditions and the following disclaimer in the documentation
##   and#or other materials provided with the distribution.
##
## * Neither the name of the copyright holder nor the names of its
##   contributors may be used to endorse or promote products derived from
##   this software without specific prior written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
## LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
## CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
## SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
## INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
## ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
## POSSIBILITY OF SUCH DAMAGE.
##
###############################################################################

cmake_minimum_required (VERSION 3.9)

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
# Use standard target names
cmake_policy(SET CMP0078 NEW)
endif()

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.14)
# Allows SWIG_MODULE_NAME to be set
cmake_policy(SET CMP0086 NEW)
endif()

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
# Allows <PackageName>_ROOT to be used
cmake_policy(SET CMP0074 NEW)
endif()

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.10)
# Allow AUTOUIC on generated source
cmake_policy(SET CMP0071 NEW)
endif()

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
# option() behavior
cmake_policy(SET CMP0077 NEW)
endif()

if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.10)
# Let AUTOMOC and AUTOUIC process GENERATED files.
cmake_policy(SET CMP0071 NEW)
endif()

# Interfers with Qt so off by default.
option(LINK_TIME_OPTIMIZATION "Flag to control link time optimization: off by default" OFF)

if (LINK_TIME_OPTIMIZATION)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
endif()

# Allow to use external shared boost libraries
option(USE_SYSTEM_BOOST "Use system shared Boost libraries" OFF)

# Allow to use external shared opensta libraries
option(USE_SYSTEM_OPENSTA "Use system shared OpenSTA library" OFF)

# Allow to use external shared abc libraries
option(USE_SYSTEM_ABC "Use system shared ABC library" OFF)

project(OpenROAD VERSION 1
  LANGUAGES CXX
)

set(OPENROAD_HOME ${PROJECT_SOURCE_DIR})

set(CMAKE_VERBOSE_MAKEFILE ON)
# Default c++ standard used unless otherwise specified in target_compile_features.
set(CMAKE_CXX_STANDARD 17 CACHE STRING "the C++ standard to use for this project")
set(CMAKE_CXX_STANDARD_REQUIRED ON)
# Disable compiler specific extensions like gnu++11.
set(CMAKE_CXX_EXTENSIONS OFF)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

# Get version string in OPENROAD_VERSION
if(NOT OPENROAD_VERSION)
  include(GetGitRevisionDescription)
  git_describe(OPENROAD_VERSION)
  string(FIND ${OPENROAD_VERSION} "NOTFOUND" GIT_DESCRIBE_NOTFOUND)
  if(${GIT_DESCRIBE_NOTFOUND} GREATER -1)
    message(WARNING "OpenROAD git describe failed, using sha1 instead")
    get_git_head_revision(GIT_REFSPEC OPENROAD_VERSION)
  endif()
endif()

message(STATUS "OpenROAD version: ${OPENROAD_VERSION}")

# Default to bulding optimnized/release executable.
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE RELEASE)
endif()

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "8.3.0")
    message(FATAL_ERROR "Insufficient gcc version. Found ${CMAKE_CXX_COMPILER_VERSION}, but require  >= 8.3.0.")
  endif()
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "7.0.0")
    message(FATAL_ERROR "Insufficient Clang version. Found ${CMAKE_CXX_COMPILER_VERSION}, but require >= 7.0.0.")
  endif()
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "12.0.0")
    message(FATAL_ERROR "Insufficient AppleClang version. Found ${CMAKE_CXX_COMPILER_VERSION}, but require >= 12.0.0.")
  endif()
else()
  message(WARNING "Compiler ${CMAKE_CXX_COMPILER_ID} is not officially supported.")
endif()

message(STATUS "System name: ${CMAKE_SYSTEM_NAME}")
message(STATUS "Compiler: ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}")
message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
message(STATUS "Install prefix: ${CMAKE_INSTALL_PREFIX}")
message(STATUS "C++ Standard: ${CMAKE_CXX_STANDARD}")
message(STATUS "C++ Standard Required: ${CMAKE_CXX_STANDARD_REQUIRED}")
message(STATUS "C++ Extensions: ${CMAKE_CXX_EXTENSIONS}")

# configure a header file to pass some of the CMake settings
configure_file(
  ${OPENROAD_HOME}/include/ord/Version.hh.cmake
  ${OPENROAD_HOME}/include/ord/Version.hh
  )

################################################################

# Ask CMake to output a compile_commands.json file for use with things like clang-tidy
set(CMAKE_EXPORT_COMPILE_COMMANDS 1)

add_subdirectory(third-party)
add_subdirectory(src)