From 9b127fc0a349972b1312866766f288534b1d47e4 Mon Sep 17 00:00:00 2001
From: Didier Raboud <odyx@debian.org>
Date: Fri, 14 Dec 2012 15:47:46 +0100
Subject: [PATCH] Add FindLTDL cmake module

As mentionned in FindLTDL.cmake, this is code that is hereby relicensed
under GPLv3.

closes #68
---
 CMakeLists.txt                                |  1 +
 cmake/FindLTDL.cmake                          | 30 +++++++++++++++++++
 src/CMakeLists.txt                            |  2 +-
 src/plugins/test/CMakeLists.txt               |  2 +-
 .../plugins/oalsound/test/CMakeLists.txt      |  2 +-
 5 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 cmake/FindLTDL.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 660c79fc..022302ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,7 @@ find_package(SDL 1.2.10 REQUIRED)
 find_package(SDL_image 1.2 REQUIRED)
 find_package(SDL_ttf 2.0 REQUIRED)
 find_package(PNG 1.2 REQUIRED)
+find_package(LTDL 2.4.2 REQUIRED)
 
 set(Boost_USE_STATIC_LIBS        ON)
 set(Boost_USE_MULTITHREADED      ON)
diff --git a/cmake/FindLTDL.cmake b/cmake/FindLTDL.cmake
new file mode 100644
index 00000000..051e70c8
--- /dev/null
+++ b/cmake/FindLTDL.cmake
@@ -0,0 +1,30 @@
+# Find the native LTDL includes and library
+# Copied verbatim from
+# http://code.metager.de/source/xref/hshannover/trust/tnc-fhh/shared/cmake_modules/FindLTDL.cmake
+# The above version was under GPL-2, this one is under GPL-3, for consistency
+# with the rest of the colobot project.
+#
+# This module defines
+#  LTDL_INCLUDE_DIR, where to find ltdl.h, etc.
+#  LTDL_LIBRARY, where to find the LTDL library.
+#  LTDL_FOUND, If false, do not try to use LTDL.
+
+FIND_PATH(LTDL_INCLUDE_DIR ltdl.h)
+
+FIND_LIBRARY(LTDL_LIBRARY ltdl)
+
+IF (LTDL_INCLUDE_DIR AND LTDL_LIBRARY)
+   SET(LTDL_FOUND TRUE)
+ELSE(LTDL_INCLUDE_DIR AND LTDL_LIBRARY)
+   SET(LTDL_FOUND FALSE)
+ENDIF (LTDL_INCLUDE_DIR AND LTDL_LIBRARY)
+
+IF (LTDL_FOUND)
+   IF (NOT LTDL_FIND_QUIETLY)
+      MESSAGE(STATUS "Found LTDL: ${LTDL_LIBRARY}")
+   ENDIF (NOT LTDL_FIND_QUIETLY)
+ELSE (LTDL_FOUND)
+   IF (LTDL_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find LTDL")
+   ENDIF (LTDL_FIND_REQUIRED)
+ENDIF (LTDL_FOUND)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f59abbc4..f68a1d50 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -173,7 +173,7 @@ ${PNG_LIBRARIES}
 ${OPTIONAL_LIBS}
 ${PLATFORM_LIBS}
 ${Boost_LIBRARIES}
-ltdl
+${LTDL_LIBRARY}
 CBot
 )
 
diff --git a/src/plugins/test/CMakeLists.txt b/src/plugins/test/CMakeLists.txt
index 5f86b6f4..a68de2cc 100644
--- a/src/plugins/test/CMakeLists.txt
+++ b/src/plugins/test/CMakeLists.txt
@@ -9,4 +9,4 @@ include_directories(".")
 include_directories("../../")
 include_directories("../../../")
 
-target_link_libraries(manager_test ltdl)
+target_link_libraries(manager_test ${LTDL_LIBRARY})
diff --git a/src/sound/plugins/oalsound/test/CMakeLists.txt b/src/sound/plugins/oalsound/test/CMakeLists.txt
index d10169b8..f7b165c4 100644
--- a/src/sound/plugins/oalsound/test/CMakeLists.txt
+++ b/src/sound/plugins/oalsound/test/CMakeLists.txt
@@ -8,4 +8,4 @@ add_executable(plugin_test plugin_test.cpp ../../../../common/iman.cpp ../../../
 include_directories(".")
 include_directories("../../../../")
 
-target_link_libraries(plugin_test ltdl)
+target_link_libraries(plugin_test ${LTDL_LIBRARY})