common.cmake

# common.cmake
#
# @copyright See `LICENSE` in the root directory of this project.
#
# This file sets the following values:
#
#
#   CMAKE_RUNTIME_OUTPUT_DIRECTORY_${CMAKE_BUILD_TYPE}
#   CMAKE_LIBRARY_OUTPUT_DIRECTORY_${CMAKE_BUILD_TYPE}
#   CMAKE_ARCHIVE_OUTPUT_DIRECTORY_${CMAKE_BUILD_TYPE}
#
#   CMAKE_DEBUG_POSTFIX
#
#   CMAKE_C_FLAGS
#   CMAKE_CXX_FLAGS
#

# Basic sanity check:
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
  message(FATAL_ERROR "Avoid building inside the source tree. Create a `build` directory?")
endif()

set(CMAKE_DEBUG_POSTFIX d)  # appends d to libraries.


if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  # go ahead and search for 64 bit libs
  set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS ON)
endif()

if(PEDANTIC)
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror" )
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden" )
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden" )
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wfloat-equal")
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow")

   if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-return-type-c-linkage")
   endif()

   if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
      # Colorize output
      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdiagnostics-color=always" )

      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wctor-dtor-privacy -Wnon-virtual-dtor" )
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wsuggest-override" )
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wredundant-decls")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wlogical-op")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wold-style-cast")
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wduplicated-branches" )
   endif()
endif()

SET_PROPERTY(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:Debug>:_DEBUG> )
SET_PROPERTY(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:Release>:NDEBUG> )
SET_PROPERTY(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:RelWithDebInfo>:NDEBUG> )
SET_PROPERTY(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:MinSizeRel>:NDEBUG> )

if(CMAKE_BUILD_TYPE STREQUAL Debug)
  add_definitions(-D_DEBUG)
elseif(CMAKE_BUILD_TYPE STREQUAL Release)
  add_definitions(-DNDEBUG)
elseif(CMAKE_BUILD_TYPE STREQUAL RelWithDebInfo)
  add_definitions(-DNDEBUG)
elseif(CMAKE_BUILD_TYPE STREQUAL MinSizeRel)
  #
else()
  # Seems the build type isn't set. Tell the users.
  message(FATAL_ERROR "\nSet CMAKE_BUILD_TYPE to one of: Release, Debug, RelWithDebInfo, or MinSizeRel\n  e.g. `cmake .. -DCMAKE_BUILD_TYPE=Debug`\n" )
endif()