From d1275e7fcce9d4fc23f418d3b841d8940d2cc163 Mon Sep 17 00:00:00 2001
From: Michael Schroeder <mls@suse.de>
Date: Mon, 2 Apr 2012 13:41:10 +0200
Subject: [PATCH] - make sure to link against the lzma library if
 ENABLE_LZMA_COMPRESSION is set

---
 CMakeLists.txt               |  3 +++
 bindings/CMakeLists.txt      |  3 +++
 cmake/modules/FindLZMA.cmake | 25 +++++++++++++++++++++++++
 examples/CMakeLists.txt      |  3 +++
 tools/CMakeLists.txt         |  3 +++
 5 files changed, 37 insertions(+)
 create mode 100644 cmake/modules/FindLZMA.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 34829bf..02b1eec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,6 +55,9 @@ INCLUDE (${CMAKE_SOURCE_DIR}/VERSION.cmake)
 
 FIND_PACKAGE (EXPAT REQUIRED)
 FIND_PACKAGE (ZLIB REQUIRED)
+IF (ENABLE_LZMA_COMPRESSION)
+FIND_PACKAGE (LZMA REQUIRED)
+ENDIF (ENABLE_LZMA_COMPRESSION)
 
 IF (FEDORA)
 MESSAGE(STATUS "Building for Fedora")
diff --git a/bindings/CMakeLists.txt b/bindings/CMakeLists.txt
index 1fe3061..b6b9a27 100644
--- a/bindings/CMakeLists.txt
+++ b/bindings/CMakeLists.txt
@@ -1,5 +1,8 @@
 # as we link with --as-needed we do not get bogus dependencies
 SET (SYSTEM_LIBRARIES ${EXPAT_LIBRARY} ${ZLIB_LIBRARY})
+IF (ENABLE_LZMA_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${LZMA_LIBRARY})
+ENDIF (ENABLE_LZMA_COMPRESSION)
 IF (NOT DEBIAN)
 SET (SYSTEM_LIBRARIES ${RPMDB_LIBRARY} ${SYSTEM_LIBRARIES})
 ENDIF (NOT DEBIAN)
diff --git a/cmake/modules/FindLZMA.cmake b/cmake/modules/FindLZMA.cmake
new file mode 100644
index 0000000..eb112df
--- /dev/null
+++ b/cmake/modules/FindLZMA.cmake
@@ -0,0 +1,25 @@
+# - Find lzma
+# Find the native LZMA headers and library
+#
+#  LZMA_INCLUDE_DIR    - where to find lzma.h, etc.
+#  LZMA_LIBRARIES      - List of libraries when using liblzma.
+#  LZMA_FOUND          - True if liblzma found.
+
+IF (LZMA_INCLUDE_DIR)
+  # Already in cache, be silent
+  SET(LZMA_FIND_QUIETLY TRUE)
+ENDIF (LZMA_INCLUDE_DIR)
+
+FIND_PATH(LZMA_INCLUDE_DIR lzma.h)
+FIND_LIBRARY(LZMA_LIBRARY NAMES lzma liblzma)
+
+# handle the QUIETLY and REQUIRED arguments and set LZMA_FOUND to TRUE if 
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LZMA DEFAULT_MSG LZMA_LIBRARY LZMA_INCLUDE_DIR)
+
+IF(LZMA_FOUND)
+  SET( LZMA_LIBRARIES ${LZMA_LIBRARY} )
+ELSE(LZMA_FOUND)
+  SET( LZMA_LIBRARIES )
+ENDIF(LZMA_FOUND)
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 1d69d21..4b857b8 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,5 +1,8 @@
 # as we link with --as-needed we do not get bogus dependencies
 SET (SYSTEM_LIBRARIES ${EXPAT_LIBRARY} ${ZLIB_LIBRARY})
+IF (ENABLE_LZMA_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${LZMA_LIBRARY})
+ENDIF (ENABLE_LZMA_COMPRESSION)
 IF (NOT DEBIAN)
 SET (SYSTEM_LIBRARIES ${RPMDB_LIBRARY} ${SYSTEM_LIBRARIES})
 ENDIF (NOT DEBIAN)
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index d5173ae..681ca55 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -6,6 +6,9 @@ ADD_LIBRARY (toolstuff STATIC common_write.c)
 
 # as we link with --as-needed we do not get bogus dependencies
 SET (SYSTEM_LIBRARIES ${EXPAT_LIBRARY} ${ZLIB_LIBRARY})
+IF (ENABLE_LZMA_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${LZMA_LIBRARY})
+ENDIF (ENABLE_LZMA_COMPRESSION)
 IF (ENABLE_RPMDB)
 SET (SYSTEM_LIBRARIES ${RPMDB_LIBRARY} ${SYSTEM_LIBRARIES})
 ENDIF (ENABLE_RPMDB)
-- 
2.7.4