Commit 40fb0051 authored by Rolf Eike Beer's avatar Rolf Eike Beer

FindBZip2: add support for version checking

parent 0020fc45
......@@ -5,6 +5,7 @@
# BZIP2_INCLUDE_DIR - the BZip2 include directory
# BZIP2_LIBRARIES - Link these to use BZip2
# BZIP2_NEED_PREFIX - this is set if the functions are prefixed with BZ2_
# BZIP2_VERSION_STRING - the version of BZip2 found (since CMake 2.8.8)
#=============================================================================
# Copyright 2006-2009 Kitware, Inc.
......@@ -24,10 +25,17 @@ FIND_PATH(BZIP2_INCLUDE_DIR bzlib.h )
FIND_LIBRARY(BZIP2_LIBRARIES NAMES bz2 bzip2 )
IF (BZIP2_INCLUDE_DIR AND EXISTS "${BZIP2_INCLUDE_DIR}/bzlib.h")
FILE(STRINGS "${BZIP2_INCLUDE_DIR}/bzlib.h" BZLIB_H REGEX "bzip2/libbzip2 version [0-9]+\\.[^ ]+ of [0-9]+ ")
STRING(REGEX REPLACE ".* bzip2/libbzip2 version ([0-9]+\\.[^ ]+) of [0-9]+ .*" "\\1" BZIP2_VERSION_STRING "${BZLIB_H}")
ENDIF (BZIP2_INCLUDE_DIR AND EXISTS "${BZIP2_INCLUDE_DIR}/bzlib.h")
# handle the QUIETLY and REQUIRED arguments and set BZip2_FOUND to TRUE if
# all listed variables are TRUE
INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(BZip2 DEFAULT_MSG BZIP2_LIBRARIES BZIP2_INCLUDE_DIR)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(BZip2
REQUIRED_VARS BZIP2_LIBRARIES BZIP2_INCLUDE_DIR
VERSION_VAR BZIP2_VERSION_STRING)
IF (BZIP2_FOUND)
INCLUDE(CheckLibraryExists)
......
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