CMakeLists.txt

# TODO: Decide on the version.
cmake_minimum_required(VERSION 3.7)

# Create the project.
project(tree_similarity)

# Copied from https://stackoverflow.com/questions/14933172/how-can-i-add-a-minimum-compiler-version-requisite/14934542#14934542
# Use "export CXX=clang++-3.9" to point cmake to use clang.
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
    # require at least gcc 7.0
    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
        message(FATAL_ERROR "GCC version must be at least 7.0!")
    endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
    # require at least clang 3.9
    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.9)
        message(FATAL_ERROR "Clang version must be at least 3.9!")
    endif()
else()
    message(WARNING "You are using an unsupported compiler! Compilation has only been tested with Clang and GCC.")
endif()

# TODO: Make it compile under Windows without Visual Studio.
#       Document the steps.

# Compiler flags.
# MUST be declared after project().
# TODO: Explain the flags.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1z -Wall -Wextra -Wpedantic")

# It's possible to set compiler-specific flags.
#if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
#  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1z -Wall")
#endif()

# Create header-only library 'TreeSimilarity'.
#
# One can also use include_directories() to add all header files which would be
# added to executables created in CMakeLists files in subdirectories.
add_library(TreeSimilarity INTERFACE)
target_include_directories(TreeSimilarity INTERFACE
  src/node
  src/label
  src/cost_model
  src/ted
  src/data_structures
  src/parser
  src/lookup
  src/lookup/scan
  src/lookup/index
  src/join
  src/join/naive
  src/join/tjoin
  src/join/tang
  src/join/degree_histogram
  src/join/leaf_dist_histogram
  src/join/label_histogram
  src/join/binary_branches
  src/join/histogram
  src/join/guha
  src/tree_generator
  src/ted_ub
  src/ted_lb
  src/json
)

# For using add_test().
include(CTest)

# Let CMake know about subdirectories.
add_subdirectory(src/)
add_subdirectory(test/)