[LyX/master] Cmake build: Search for spell checking libraries unconditionally

[Kornel Benko]

commit 6dc198ed6e29131229fd9b47bba528fce206cf2e
Author: Kornel Benko <kor...@lyx.org>
Date:   Tue May 13 12:31:37 2014 +0200

    Cmake build: Search for spell checking libraries unconditionally
    
    New option: LYX_REQUIRE_SPELLCHECK. If set and no spellchecker found
      stop the compilation
      if not set, compile in many speckeckers as possible from the set
      of 'ASPELL', 'Hunspell', 'Enchant'

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe133eb..9ac172d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,6 +84,7 @@ 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)
@@ -540,20 +541,22 @@ endif()
 
 include_directories(${TOP_BINARY_DIR} ${TOP_SRC_DIR}/src)
 
-if(LYX_ASPELL)
-       find_package(ASPELL REQUIRED)
-       include_directories(${ASPELL_INCLUDE_DIR})
-endif()
-
-if(LYX_ENCHANT)
-       find_package(Enchant REQUIRED)
-       include_directories(${ENCHANT_INCLUDE_DIR})
-endif()
-
-if(LYX_HUNSPELL)
-       find_package(Hunspell REQUIRED)
-       include_directories(${HUNSPELL_INCLUDE_DIR})
-endif()
+set(Spelling_FOUND OFF)
+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}")
+  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_NLS)
        FIND_PROGRAM(LYX_PYTHON_EXECUTABLE python2 python HINTS 
${GNUWIN32_DIR}/python)
@@ -819,6 +822,15 @@ if(LYX_NLS)
        message(STATUS)
 endif()
 
+if(NOT Spelling_FOUND)
+  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)