]> git.lyx.org Git - lyx.git/blobdiff - CMakeLists.txt
adjust qt configure options for 5.5.1, avoid -arch deprecated warning for qt5
[lyx.git] / CMakeLists.txt
index 8ab1bea25829a72c3d5e9239fb9492a88a60ea2a..a87b049357d195c3f2317321b4fe25981567aa25 100644 (file)
@@ -40,6 +40,16 @@ if(COMMAND cmake_policy)
        cmake_policy(SET CMP0005 OLD)
        # Installing MACOSX_BUNDLE targets requires a BUNDLE DESTINATION
        cmake_policy(SET CMP0006 NEW)
+       if(POLICY CMP0020)
+               cmake_policy(SET CMP0020 OLD)
+       endif()
+       if(POLICY CMP0028)
+               cmake_policy(SET CMP0028 OLD)
+       endif()
+       if(POLICY CMP0043)
+               # COMPILE_DEFINITIONS are not used yet. Enable new behavior.
+               cmake_policy(SET CMP0043 NEW)
+       endif()
 endif()
 
 set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
@@ -47,9 +57,29 @@ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
 # Supress regeneration
 set(CMAKE_SUPPRESS_REGENERATION FALSE)
 
+if(LYX_XMINGW)
+    set(CMAKE_SYSTEM_NAME Windows)
+    set(TOOLNAME ${LYX_XMINGW})
+    set(TOOLCHAIN "${TOOLNAME}-")
+    set(CMAKE_C_COMPILER   "${TOOLCHAIN}gcc"     CACHE PATH "Mingw C compiler" FORCE)
+    set(CMAKE_CXX_COMPILER "${TOOLCHAIN}g++"     CACHE PATH "Mingw C++ compiler" FORCE)
+    set(CMAKE_RC_COMPILER  "${TOOLCHAIN}windres" CACHE PATH "Mingw rc compiler" FORCE)
+
+    set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH)
+    set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+    set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
 if(NOT help AND NOT HELP)
-       # 'project' triggers the searching for a compiler
-       project(${LYX_PROJECT})
+  # 'project' triggers the searching for a compiler
+  project(${LYX_PROJECT})
+  if (CMAKE_COMPILER_IS_GNUCXX)
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.0")
+      message(STATUS "Gnu CXX compiler version = ${CMAKE_CXX_COMPILER_VERSION}")
+      message(STATUS "is too old, should be >= 4.0")
+      message(FATAL_ERROR "Exiting")
+    endif()
+  endif()
 endif()
 
 if(UNIX)
@@ -76,6 +106,11 @@ include(LyXMacros)
 # 3. parameter: default value, ON or OFF
 # 4. parameter: system on which option is used: ALL, GCC, MSVC, ...
 
+# Usage LYX_COMBO
+# 1. parameter: name without prefix 'LYX_'
+# 2. parameter: description
+# 3. parameter: default value
+# 4-n parameter: possible other string values
 
 LYX_OPTION_INIT()
 
@@ -84,6 +119,7 @@ LYX_OPTION(CPACK            "Use the CPack management (Implies LYX_INSTALL optio
 LYX_OPTION(LOCALVERSIONING  "Add version info to created package name (only used if LYX_CPACK option set)" OFF ALL)
 LYX_OPTION(INSTALL          "Build install projects/rules (implies a bunch of other options)" OFF ALL)
 LYX_OPTION(NLS              "Enable Native Language Support (NLS)" ON ALL)
+LYX_OPTION(REQUIRE_SPELLCHECK "Abort if no spellchecker available" OFF ALL)
 LYX_OPTION(ASPELL           "Require aspell" OFF ALL)
 LYX_OPTION(ENCHANT          "Require Enchant" OFF ALL)
 LYX_OPTION(HUNSPELL         "Require Hunspell" OFF ALL)
@@ -99,6 +135,9 @@ LYX_OPTION(QUIET            "Don't generate verbose makefiles" OFF ALL)
 LYX_OPTION(INSTALL_PREFIX   "Install path for LyX" OFF ALL)
 LYX_OPTION(BUNDLE           "Build bundle  (experimental) " OFF ALL)
 LYX_OPTION(ENABLE_URLTESTS  "Enable for URL tests" OFF ALL)
+LYX_OPTION(ENABLE_EXPORT_TESTS "Enable for export tests" OFF ALL)
+LYX_OPTION(ASAN             "Use address sanitizer" OFF ALL)
+LYX_COMBO(USE_QT            "Use Qt version as frontend" QT4 QT5)
 
 # GCC specific
 LYX_OPTION(PROFILE              "Build profile version" OFF GCC)
@@ -107,7 +146,6 @@ LYX_OPTION(PROGRAM_SUFFIX       "Append version suffix to binaries" ON GCC)
 LYX_OPTION(DEBUG_GLIBC          "Enable libstdc++ debug mode" OFF GCC)
 LYX_OPTION(DEBUG_GLIBC_PEDANTIC "Enable libstdc++ pedantic debug mode" OFF GCC)
 LYX_OPTION(STDLIB_DEBUG         "Use debug stdlib" OFF GCC)
-LYX_OPTION(CONCEPT_CHECKS       "Enable concept-checks" OFF GCC)
 LYX_OPTION(PROFILE              "Build with options for gprof" OFF GCC)
 LYX_OPTION(ENABLE_CXX11         "Build with options for c++11-mode" OFF GCC)
 
@@ -145,7 +183,7 @@ endif()
 
 if(LYX_INSTALL)
        set(LYX_NLS ON)
-       if (WIN32)
+        if(WIN32 AND NOT MINGW)
                set(LYX_HUNSPELL ON)
        endif()
        if(LYX_CONSOLE MATCHES "FORCE")
@@ -167,6 +205,7 @@ else()
        set(LYX_MERGE_REBUILD OFF)
 endif()
 
+
 if(LYX_DEPENDENCIES_DOWNLOAD)
        message(STATUS)
        set(LYX_DEPENDENCIES_DIR ${TOP_BINARY_DIR}/msvc2010-deps)
@@ -190,6 +229,10 @@ if(LYX_DEPENDENCIES_DOWNLOAD)
                endif()
        endforeach()
        set(GNUWIN32_DIR ${LYX_DEPENDENCIES_DIR}/deps20)
+    if(MSVC12)
+        # handle error in msvc12 when linking against msvc10 libs
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /vd2")
+    endif()
 endif()
 
 
@@ -206,13 +249,12 @@ endif()
 
 set(LYX_GCC11_MODE)
 if(UNIX OR MINGW)
-       execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+       execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE)
        message(STATUS "Using GCC version ${GCC_VERSION}")
-       if(NOT GCC_VERSION VERSION_LESS 4.4)
-               set(LYX_USE_TR1 1)
-               # GCC <= 4.5 does not support regex: there are linker errors
-               # http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.tr1
-               set(LYX_USE_TR1_REGEX 0)
+       if(GCC_VERSION VERSION_LESS 4.9)
+               # <regex> in gcc is unusable in versions less than 4.9.0
+               # see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53631
+               set(LYX_USE_STD_REGEX 0)
        endif()
        if (LYX_ENABLE_CXX11)
                find_package(CXX11Compiler)
@@ -222,10 +264,10 @@ if(UNIX OR MINGW)
                set(LYX_GCC11_MODE "${CXX11_FLAG}")
        endif()
 else()
-       if(MSVC10)
-               set(LYX_USE_TR1 1)
-               #set(LYX_USE_TR1_REGEX 1) #TODO should we use it in ECMAScript mode?
-       endif()
+       set(LYX_USE_STD_REGEX 0)
+#      if(MSVC10)
+#              set(LYX_USE_STD_REGEX 1) #TODO should we use it in ECMAScript mode?
+#      endif()
 endif()
 
 
@@ -276,29 +318,26 @@ foreach(_c_l ${_config_lines} )
        endif()
 endforeach(_c_l)
 
-if (LYX_LOCALVERSIONING)
-       # Find the revision number and for later use
-       FIND_PROGRAM(LYX_GITVERSION git)
-       #message(STATUS "gitversion = ${LYX_GITVERSION}")
-       if(LYX_GITVERSION)
-               EXECUTE_PROCESS(COMMAND ${LYX_GITVERSION} describe --match 2.0.0 HEAD
-                WORKING_DIRECTORY "${TOP_SRC_DIR}" OUTPUT_VARIABLE LYX_PACKAGE_RELEASE OUTPUT_STRIP_TRAILING_WHITESPACE)
-               if (LYX_PACKAGE_RELEASE MATCHES "^2\\.0\\.0\\-\([0-9]+\)\\-.*$")
-                 # We will add offset of 40000 to get appropriate value to
-                 # previous svn.
-                 # We use this value than also to set the package-patch-value
-                 MATH(EXPR tmp_REVISION_VERSION "(${CMAKE_MATCH_1}+40000)")
-                 set(LYX_REVISION_VERSION "${LYX_PATCH_VERSION}-${tmp_REVISION_VERSION}git")
-                  set(ENABLE_DIST ON)
-               endif()
-       else()
-               set(LYX_REVISION_VERSION git) #TODO use date
-       endif()
-else()
-       set(LYX_REVISION_VERSION ${LYX_PATCH_VERSION})
+FIND_PROGRAM(LYX_GITVERSION git)
+#message(STATUS "gitversion = ${LYX_GITVERSION}")
+set(LYX_REVISION_VERSION ${LYX_PATCH_VERSION})
+if(LYX_GITVERSION)
+  if (LYX_LOCALVERSIONING)
+    # Find the revision number and for later use
+    EXECUTE_PROCESS(COMMAND ${LYX_GITVERSION} describe --match 2.0.0 HEAD
+      WORKING_DIRECTORY "${TOP_SRC_DIR}" OUTPUT_VARIABLE LYX_PACKAGE_RELEASE OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if (LYX_PACKAGE_RELEASE MATCHES "^2\\.0\\.0\\-\([0-9]+\)\\-.*$")
+      # We will add offset of 40000 to get appropriate value to
+      # previous svn.
+      # We use this value than also to set the package-patch-value
+      MATH(EXPR tmp_REVISION_VERSION "(${CMAKE_MATCH_1}+40000)")
+      set(LYX_REVISION_VERSION "${LYX_PATCH_VERSION}-${tmp_REVISION_VERSION}git")
+      set(ENABLE_DIST ON)
+    endif()
+  endif()
 endif()
 
-# Set the programs (lyx, tex2lyx, etc.) suffix 
+# Set the programs (lyx, tex2lyx, etc.) suffix
 # When building an OS X bundle, we will append
 # the suffix only to the bundle, not to the programs
 set(PROGRAM_SUFFIX "")
@@ -373,13 +412,14 @@ if(LYX_INSTALL_PREFIX)
 endif()
 set(LYX_INSTALL_PREFIX ${LYX_INSTALL_PREFIX} CACHE PATH "LyX user's choice install prefix" FORCE)
 
+string(REGEX REPLACE "/lyx${LYX_INSTALL_SUFFIX}$" "/share" SYSTEM_DATADIR ${CMAKE_INSTALL_PREFIX})
+
 if(LYX_PACKAGE_SUFFIX)
        set(PACKAGE ${PACKAGE_BASE}${LYX_INSTALL_SUFFIX})
 else()
        set(PACKAGE ${PACKAGE_BASE})
 endif()
 
-
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
        # see http://www.cmake.org/pipermail/cmake/2006-October/011559.html
        if (UNIX)
@@ -437,8 +477,8 @@ if(NOT GROUP_CODE)
 endif()
 
 # lyx's source files
-set(LYX_CPP_FILES *.cpp)
-set(LYX_HPP_FILES *.h)
+set(LYX_CPP_FILES [a-zA-Z]*.cpp)
+set(LYX_HPP_FILES [a-zA-Z]*.h)
 set(LYX_MOC_FILES moc_*.cpp)
 
 include(ProjectSourceGroup)
@@ -483,13 +523,10 @@ if(NOT MSVC)
        if(NOT LYX_QUIET)
                set(CMAKE_VERBOSE_MAKEFILE ON)
        endif()
-       set(LYX_CXX_FLAGS "-Wall -Wunused-parameter ${LYX_GCC11_MODE}")
+    set(LYX_CXX_FLAGS "-Wall -Wunused-parameter ${LYX_GCC11_MODE}")
        if(LYX_STDLIB_DEBUG)
                set(LYX_CXX_FLAGS "${LYX_CXX_FLAGS} -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC")
        endif()
-       if(LYX_CONCEPT_CHECKS)
-               set(LYX_CXX_FLAGS "${LYX_CXX_FLAGS} -D_GLIBCPP_CONCEPT_CHECKS")
-       endif()
        set(CMAKE_CXX_FLAGS       "${LYX_CXX_FLAGS} -fno-strict-aliasing " CACHE TYPE STRING FORCE)
        set(CMAKE_CXX_FLAGS_DEBUG "${LYX_CXX_FLAGS} -fno-strict-aliasing -O0 -g3 -D_DEBUG" CACHE TYPE STRING FORCE)
        if(MINGW)
@@ -507,20 +544,36 @@ if(LYX_CXX_FLAGS_EXTRA)
        endforeach()
 endif()
 
-find_package(Qt5Core QUIET)
-if (Qt5Core_FOUND)
-       find_package(Qt5Widgets REQUIRED)
-       set(QTVERSION ${Qt5Core_VERSION})
-       macro (qt_use_modules)
-               qt5_use_modules(${ARGN})
-       endmacro()
-       macro (qt_add_resources)
-               qt5_add_resources(${ARGN})
-       endmacro()
-       macro (qt_wrap_uifiles)
-               qt5_wrap_ui(${ARGN})
-       endmacro()
-else()
+if(LYX_XMINGW)
+       list(APPEND CMAKE_FIND_ROOT_PATH ${GNUWIN32_DIR})
+endif()
+
+if(LYX_USE_QT MATCHES "QT5")
+       find_package(Qt5Core REQUIRED)
+       if (Qt5Core_FOUND)
+               find_package(Qt5Widgets REQUIRED)
+               if(APPLE)
+                       find_package(Qt5MacExtras REQUIRED)
+               endif()
+               find_package(Qt5X11Extras QUIET)
+               find_package(Qt5WinExtras QUIET)
+               set(QTVERSION ${Qt5Core_VERSION})
+               macro (qt_use_modules)
+                       qt5_use_modules(${ARGN})
+               endmacro()
+               macro (qt_add_resources)
+                       qt5_add_resources(${ARGN})
+               endmacro()
+               macro (qt_wrap_uifiles)
+                       qt5_wrap_ui(${ARGN})
+               endmacro()
+               message(STATUS "Found Qt-Version ${QTVERSION}")
+       endif()
+elseif(LYX_USE_QT MATCHES "QT4")
+       if(LYX_XMINGW)
+               set(QT_MINGW_DIR ${LYX_QT4} CACHE PATH "Qt for Mingw" FORCE)
+               list(APPEND CMAKE_FIND_ROOT_PATH ${QT_MINGW_DIR} ${GNUWIN32_DIR})
+       endif()
        find_package(Qt4 "4.5.0" REQUIRED)
        macro (qt_use_modules)
        endmacro()
@@ -530,6 +583,8 @@ else()
        macro (qt_wrap_uifiles)
                qt4_wrap_ui(${ARGN})
        endmacro()
+else()
+  message(FATAL_ERROR "Unhandled value for LYX_USE_QT (${LYX_USE_QT})")
 endif()
 
 find_package(Magic)
@@ -539,23 +594,44 @@ endif()
 
 include_directories(${TOP_BINARY_DIR} ${TOP_SRC_DIR}/src)
 
-if(LYX_ASPELL)
-       find_package(ASPELL REQUIRED)
-       include_directories(${ASPELL_INCLUDE_DIR})
-endif()
+set(Spelling_FOUND OFF)
+set(Include_used_spellchecker)   # String will be inserted into config.h
+
+foreach(_spell "ASPELL" "Enchant" "Hunspell")
+  string(TOUPPER ${_spell} _upspell)
+  find_package(${_spell})
+  if (${_upspell}_FOUND)
+    include_directories(${${_upspell}_INCLUDE_DIR})
+    set(Spelling_FOUND ON)
+    message(STATUS "Building with USE_${_upspell}")
+    set(Include_used_spellchecker "${Include_used_spellchecker}#define USE_${_upspell} 1\n")
+  else()
+    if(LYX_${_upspell})
+      message(FATAL_ERROR "Required ${_spell} devel package not found")
+    else()
+      message(STATUS "${_upspell} not found, building without ${_spell} support")
+    endif()
+  endif()
+endforeach()
 
-if(LYX_ENCHANT)
-       find_package(Enchant REQUIRED)
-       include_directories(${ENCHANT_INCLUDE_DIR})
+find_package(PythonInterp 2.7 QUIET)
+if(PYTHONINTERP_FOUND)
+  if(PYTHON_VERSION_STRING VERSION_GREATER 2.8)
+    unset(PYTHONINTERP_FOUND)
+  endif()
 endif()
 
-if(LYX_HUNSPELL)
-       find_package(Hunspell REQUIRED)
-       include_directories(${HUNSPELL_INCLUDE_DIR})
+if (NOT PYTHONINTERP_FOUND)
+  unset(PYTHON_EXECUTABLE CACHE)
+  unset(PYTHON_VERSION_MAJOR)
+  unset(PYTHON_VERSION_MINOR)
+  unset(PYTHON_VERSION_STRING)
+  find_package(PythonInterp 3.3 REQUIRED)
 endif()
 
+set(LYX_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE} CACHE FILEPATH "Python to be used by LyX")
+
 if(LYX_NLS)
-       FIND_PROGRAM(LYX_PYTHON_EXECUTABLE python2 python HINTS ${GNUWIN32_DIR}/python)
        find_package(LyXGettext)
        if(LYX_PYTHON_EXECUTABLE AND GETTEXT_FOUND)
                add_subdirectory(po "${TOP_BINARY_DIR}/po")
@@ -570,21 +646,33 @@ if(LYX_NLS)
        endif()
 endif()
 
+
 find_package(ICONV REQUIRED)
 find_package(ZLIB REQUIRED)
 
 if(LYX_EXTERNAL_BOOST)
        message(STATUS "Searching for boost")
-       find_package(Boost COMPONENTS signals regex) #TODO could REQUIRED be used
+       if(LYX_USE_STD_REGEX)
+               find_package(Boost COMPONENTS signals)
+       else()
+               find_package(Boost COMPONENTS signals regex)
+       endif()
        if(Boost_FOUND)
                message(STATUS "Boost found")
                message(STATUS "Boost-libs = ${Boost_LIBRARIES}")
                set(Lyx_Boost_Libraries ${Boost_LIBRARIES})
+               if (LYX_STDLIB_DEBUG)
+                       # Comment from  Jean-Marc Lasgouttes:
+                       # In general, system boost libraries are incompatible with
+                       # the use of stdlib-debug in libstdc++. See ticket #9736 for
+                       # details.
+                       message(WARNING "Compiling LyX with stdlib-debug and system boost libraries may lead to crashes. Consider using '-DLYX_STDLIB_DEBUG=OFF' or using '-DLYX_EXTERNAL_BOOST=OFF'")
+               endif()
        else()
                message(FATAL_ERROR "Boost not found" ${Boost_ERROR_REASON})
        endif()
 else()
-       if(LYX_USE_TR1_REGEX)
+       if(LYX_USE_STD_REGEX)
                set(Lyx_Boost_Libraries boost_signals)
        else()
                set(Lyx_Boost_Libraries boost_signals boost_regex)
@@ -644,8 +732,8 @@ if(LYX_PCH)
                                COMPILE_FLAGS "/Ycconfig.h /Fp\$(IntDir)/config.pch")
                        set(${name_}_sources ${${name_}_sources} ${TOP_BINARY_DIR}/config_pch.cpp
                                ${TOP_BINARY_DIR}/pcheaders.h)
-                       set(CMAKE_CXX_FLAGS_DEBUG       "${CMAKE_CXX_FLAGS_DEBUG} /DLYX_PCH_STL /DLYX_PCH_BOOST /DLYX_PCH_QT4")
-                       set(CMAKE_CXX_FLAGS_RELEASE     "${CMAKE_CXX_FLAGS_RELEASE} /DLYX_PCH_STL /DLYX_PCH_BOOST /DLYX_PCH_QT4")
+                       set(CMAKE_CXX_FLAGS_DEBUG       "${CMAKE_CXX_FLAGS_DEBUG} /DLYX_PCH_STL /DLYX_PCH_BOOST /DLYX_PCH_QT")
+                       set(CMAKE_CXX_FLAGS_RELEASE     "${CMAKE_CXX_FLAGS_RELEASE} /DLYX_PCH_STL /DLYX_PCH_BOOST /DLYX_PCH_QT")
                        set(CMAKE_CXX_FLAGS_MINSIZEREL  "${CMAKE_CXX_FLAGS_MINSIZEREL} /DLYX_PCH_STL /DLYX_PCH_BOOST")
                endmacro(lyx_add_msvc_pch)
                macro(lyx_add_gcc_pch name_)
@@ -654,7 +742,7 @@ if(LYX_PCH)
                macro(lyx_add_msvc_pch name_)
                endmacro()
                macro(lyx_add_gcc_pch name_)
-                       add_definitions(-DLYX_PCH_STL -DLYX_PCH_BOOST -DLYX_PCH_QT4)
+                       add_definitions(-DLYX_PCH_STL -DLYX_PCH_BOOST -DLYX_PCH_QT)
                        ADD_PRECOMPILED_HEADER(${name_} ${TOP_BINARY_DIR}/config_pch.cpp ${TOP_BINARY_DIR}/config.h.gch)
                endmacro()
        endif()
@@ -778,12 +866,23 @@ endif ()
 add_custom_target (lyx_run_tests COMMAND ${cmd})
 set_target_properties(lyx_run_tests PROPERTIES FOLDER "tests")
 
+if(LYX_ASAN)
+    set(LYX_CXX_FLAGS "-fsanitize=address -fno-omit-frame-pointer -g")
+    message(STATUS)
+    message(STATUS "Address sanitizer enabled. Usage:")
+    message(STATUS "    wget https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/asan/scripts/asan_symbolize.py")
+    message(STATUS "    chmod  +x ./asan_symbolize.py")
+    message(STATUS "    ./bin/lyx2.2 2>&1 | ./asan_symbolize.py  | c++filt ")
+    message(STATUS)
+endif()
 
 if(LYX_INSTALL)
        if(${LYX_PYTHON_EXECUTABLE} MATCHES "-NOTFOUND")
                message(STATUS "Python required to create doc!")
        else()
-               add_subdirectory(${LYX_CMAKE_DIR}/man "${TOP_BINARY_DIR}/man")
+               if(UNIX)
+                       add_subdirectory(${LYX_CMAKE_DIR}/man "${TOP_BINARY_DIR}/man")
+               endif()
                add_subdirectory(${LYX_CMAKE_DIR}/doc "${TOP_BINARY_DIR}/doc")
        endif()
        include(../Install)
@@ -800,8 +899,9 @@ if(LYX_ENABLE_URLTESTS)
 endif()
 
 message(STATUS)
-message(STATUS "Build options, switch LYX_* variables by -DLYX_*=ON or OFF:")
+message(STATUS "Build params, switch LYX_* options by -DLYX_*=ON or OFF, LYX_* combos by -DLYX_*=value:")
 message(STATUS)
+
 LYX_OPTION_LIST_ALL(used)
 
 
@@ -818,6 +918,17 @@ if(LYX_NLS)
        message(STATUS)
 endif()
 
+# Apple has builtin native spell checker,
+# no need to warn for missing Aspell, Hunspell or Enchant
+if(NOT Spelling_FOUND AND NOT APPLE)
+  if(LYX_REQUIRE_SPELLCHECK)
+    set(_mode "FATAL_ERROR")
+  else()
+    set(_mode "STATUS")
+  endif()
+  message(${_mode} "No spellcheck libraries found. LyX will be unable use spellchecking")
+endif()
+
 include("${TOP_CMAKE_PATH}/LyxPackaging.cmake")
 
 if(ENABLE_DIST)