1 files changed, 67 insertions, 0 deletions
diff --git a/Modules/FindLibArchive.cmake b/Modules/FindLibArchive.cmake
new file mode 100644
index 000000000..be931c525
--- /dev/null
+++ b/Modules/FindLibArchive.cmake
@@ -0,0 +1,67 @@
+# - Find libarchive library and headers
+# The module defines the following variables:
+#
+#  LibArchive_FOUND        - true if libarchive was found
+#  LibArchive_INCLUDE_DIRS - include search path
+#  LibArchive_LIBRARIES    - libraries to link
+#  LibArchive_VERSION      - libarchive 3-component version number
+
+#=============================================================================
+# Copyright 2010 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+find_path(LibArchive_INCLUDE_DIR
+  NAMES archive.h
+  PATHS
+  "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\LibArchive;InstallPath]/include"
+  )
+
+find_library(LibArchive_LIBRARY
+  NAMES archive libarchive
+  PATHS
+  "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\LibArchive;InstallPath]/lib"
+  )
+
+mark_as_advanced(LibArchive_INCLUDE_DIR LibArchive_LIBRARY)
+
+# Extract the version number from the header.
+if(LibArchive_INCLUDE_DIR AND EXISTS "${LibArchive_INCLUDE_DIR}/archive.h")
+  # The version string appears in one of two known formats in the header:
+  #  #define ARCHIVE_LIBRARY_VERSION "libarchive 2.4.12"
+  #  #define ARCHIVE_VERSION_STRING "libarchive 2.8.4"
+  # Match either format.
+  set(_LibArchive_VERSION_REGEX "^#define[ \t]+ARCHIVE[_A-Z]+VERSION[_A-Z]*[ \t]+\"libarchive +([0-9]+)\\.([0-9]+)\\.([0-9]+)[^\"]*\".*$")
+  file(STRINGS "${LibArchive_INCLUDE_DIR}/archive.h" _LibArchive_VERSION_STRING LIMIT_COUNT 1 REGEX "${_LibArchive_VERSION_REGEX}")
+  if(_LibArchive_VERSION_STRING)
+    string(REGEX REPLACE "${_LibArchive_VERSION_REGEX}" "\\1.\\2.\\3" LibArchive_VERSION "${_LibArchive_VERSION_STRING}")
+  endif()
+  unset(_LibArchive_VERSION_REGEX)
+  unset(_LibArchive_VERSION_STRING)
+endif()
+
+# Handle the QUIETLY and REQUIRED arguments and set LIBARCHIVE_FOUND
+# to TRUE if all listed variables are TRUE.
+# (Use ${CMAKE_ROOT}/Modules instead of ${CMAKE_CURRENT_LIST_DIR} because CMake
+#  itself includes this FindLibArchive when built with an older CMake that does
+#  not provide it.  The older CMake also does not have CMAKE_CURRENT_LIST_DIR.)
+include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
+find_package_handle_standard_args(LibArchive
+                                  REQUIRED_VARS LibArchive_LIBRARY LibArchive_INCLUDE_DIR
+                                  VERSION_VAR LibArchive_VERSION
+  )
+set(LibArchive_FOUND ${LIBARCHIVE_FOUND})
+unset(LIBARCHIVE_FOUND)
+
+if(LibArchive_FOUND)
+  set(LibArchive_INCLUDE_DIRS ${LibArchive_INCLUDE_DIR})
+  set(LibArchive_LIBRARIES    ${LibArchive_LIBRARY})
+endif()