From 20c9b77b712211f6d04c0166c78f579e19869473 Mon Sep 17 00:00:00 2001
From: Hugo Parente Lima <hugo.pl@gmail.com>
Date: Mon, 16 Aug 2010 15:02:59 -0300
Subject: Make libxml2 and libxslt optional dependencies.

---
 ApiExtractorConfig.cmake.in |  4 +++-
 CMakeLists.txt              | 34 ++++++++++++++++++++++++++--------
 tests/CMakeLists.txt        |  4 +++-
 3 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/ApiExtractorConfig.cmake.in b/ApiExtractorConfig.cmake.in
index 6c4001fff..f36c13f8d 100644
--- a/ApiExtractorConfig.cmake.in
+++ b/ApiExtractorConfig.cmake.in
@@ -7,4 +7,6 @@ if(MSVC)
     SET(APIEXTRACTOR_LIBRARY "@LIB_INSTALL_DIR@/@CMAKE_SHARED_LIBRARY_PREFIX@apiextractor.lib")
 else()
     SET(APIEXTRACTOR_LIBRARY "@LIB_INSTALL_DIR@/@CMAKE_SHARED_LIBRARY_PREFIX@apiextractor@CMAKE_SHARED_LIBRARY_SUFFIX@")
-endif()
\ No newline at end of file
+endif()
+
+SET(APIEXTRACTOR_DOCSTRINGS_DISABLED @DISABLE_DOCSTRINGS@)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9d2de1fb..aa1e61ffc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,11 +4,19 @@ cmake_minimum_required(VERSION 2.6)
 
 find_package(Qt4 4.5.0 REQUIRED)
 
-find_package(LibXml2 2.6.32 REQUIRED)
-find_package(LibXslt 1.1.19 REQUIRED)
+find_package(LibXml2 2.6.32)
+find_package(LibXslt 1.1.19)
 
+option(DISABLE_DOCSTRINGS "Disable documentation extraction." FALSE)
 option(BUILD_TESTS "Build tests." TRUE)
 
+if (NOT DISABLE_DOCSTRINGS)
+    if (NOT LIBXSLT_FOUND OR NOT LIBXML2_FOUND)
+        set(DISABLE_DOCSTRINGS TRUE)
+        message(WARNING "libxslt and/or libxml not found, disabling support to doc strings!")
+    endif()
+endif()
+
 if(MSVC)
     set(CMAKE_CXX_FLAGS "/DWIN32 /D_WINDOWS /w /EHsc- /GS- /GR- /DAPIEXTRACTOR_BUILD -D_SCL_SECURE_NO_WARNINGS")
 elseif(CMAKE_HOST_UNIX)
@@ -54,9 +62,6 @@ apiextractor.cpp
 abstractmetabuilder.cpp
 abstractmetalang.cpp
 asttoxml.cpp
-docparser.cpp
-doxygenparser.cpp
-qtdocparser.cpp
 fileout.cpp
 graph.cpp
 reporthandler.cpp
@@ -86,6 +91,20 @@ parser/rpp/builtin-macros.cpp
 parser/rpp/preprocessor.cpp
 )
 
+if (NOT DISABLE_DOCSTRINGS)
+    set(apiextractor_SRC
+        ${apiextractor_SRC}
+        docparser.cpp
+        doxygenparser.cpp
+        qtdocparser.cpp
+    )
+    set(APIEXTRACTOR_EXTRA_INCLUDES ${LIBXSLT_INCLUDE_DIR} ${LIBXML2_INCLUDE_DIR})
+    set(APIEXTRACTOR_EXTRA_LIBRARIES ${LIBXSLT_LIBRARIES} ${LIBXML2_LIBRARIES})
+else()
+    set(APIEXTRACTOR_EXTRA_INCLUDES "")
+    set(APIEXTRACTOR_EXTRA_LIBRARIES "")
+endif()
+
 set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE PATH "The subdirectory relative to the install prefix where libraries will be installed (default is /lib${LIB_SUFFIX})" FORCE)
 
 qt4_add_resources(apiextractor_RCCS_SRC generator.qrc)
@@ -96,12 +115,11 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}
                     ${CMAKE_CURRENT_SOURCE_DIR}/parser
                     ${CMAKE_CURRENT_SOURCE_DIR}/parser/rpp
                     ${QT_INCLUDE_DIR}
-                    ${LIBXSLT_INCLUDE_DIR}
-                    ${LIBXML2_INCLUDE_DIR}
+                    ${APIEXTRACTOR_EXTRA_INCLUDES}
                     )
 
 add_library(apiextractor SHARED ${apiextractor_SRC} ${apiextractor_RCCS_SRC})
-target_link_libraries(apiextractor ${LIBXSLT_LIBRARIES} ${LIBXML2_LIBRARIES} ${QT_QTCORE_LIBRARY} ${QT_QTXMLPATTERNS_LIBRARY} ${QT_QTXML_LIBRARY})
+target_link_libraries(apiextractor ${APIEXTRACTOR_EXTRA_LIBRARIES} ${QT_QTCORE_LIBRARY} ${QT_QTXMLPATTERNS_LIBRARY} ${QT_QTXML_LIBRARY})
 set_target_properties(apiextractor PROPERTIES VERSION ${apiextractor_VERSION} SOVERSION ${apiextractor_SOVERSION})
 
 # create pkg-config file
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index debccf3c1..acd9fcc96 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -18,7 +18,9 @@ declare_test(testdtorinformation)
 declare_test(testenum)
 declare_test(testfunctiontag)
 declare_test(testimplicitconversions)
-declare_test(testmodifydocumentation)
+if (NOT DISABLE_DOCSTRINGS)
+    declare_test(testmodifydocumentation)
+endif()
 declare_test(testmodifyfunction)
 declare_test(testmultipleinheritance)
 declare_test(testnamespace)
-- 
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