Update readme

CMakeModules/FindLibMagic.cmake

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+
+#-------------------------------------------------------------------------------
+# Copyright (c) 2013-2013, Lars Baehren <lbaehren@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#-------------------------------------------------------------------------------
+
+# - Check for the presence of LIBMAGIC
+#
+# The following variables are set when LIBMAGIC is found:
+#  LIBMAGIC_FOUND      = Set to true, if all components of LIBMAGIC have been
+#                        found.
+#  LIBMAGIC_INCLUDES   = Include path for the header files of LIBMAGIC
+#  LIBMAGIC_LIBRARIES  = Link these to use LIBMAGIC
+#  LIBMAGIC_LFLAGS     = Linker flags (optional)
+
+if (NOT LIBMAGIC_FOUND)
+
+  if (NOT LIBMAGIC_ROOT_DIR)
+    set (LIBMAGIC_ROOT_DIR ${CMAKE_INSTALL_PREFIX})
+  endif (NOT LIBMAGIC_ROOT_DIR)
+
+  ##____________________________________________________________________________
+  ## Check for the header files
+
+  find_path (LIBMAGIC_FILE_H
+    NAMES file/file.h
+    HINTS ${LIBMAGIC_ROOT_DIR} ${CMAKE_INSTALL_PREFIX}
+    PATH_SUFFIXES include
+    )
+  if (LIBMAGIC_FILE_H)
+    list (APPEND LIBMAGIC_INCLUDES ${LIBMAGIC_FILE_H})
+  endif (LIBMAGIC_FILE_H)
+
+  find_path (LIBMAGIC_MAGIC_H
+    NAMES magic.h
+    HINTS ${LIBMAGIC_ROOT_DIR} ${CMAKE_INSTALL_PREFIX}
+    PATH_SUFFIXES include include/linux
+    )
+  if (LIBMAGIC_MAGIC_H)
+    list (APPEND LIBMAGIC_INCLUDES ${LIBMAGIC_MAGIC_H})
+  endif (LIBMAGIC_MAGIC_H)
+
+  list (REMOVE_DUPLICATES LIBMAGIC_INCLUDES)
+
+  ##____________________________________________________________________________
+  ## Check for the library
+
+  find_library (LIBMAGIC_LIBRARIES magic
+    HINTS ${LIBMAGIC_ROOT_DIR} ${CMAKE_INSTALL_PREFIX}
+    PATH_SUFFIXES lib
+    )
+
+  ##____________________________________________________________________________
+  ## Actions taken when all components have been found
+
+  #find_package_handle_standard_args (LIBMAGIC DEFAULT_MSG LIBMAGIC_LIBRARIES LIBMAGIC_INCLUDES)
+
+  if (LIBMAGIC_FOUND)
+    if (NOT LIBMAGIC_FIND_QUIETLY)
+      message (STATUS "Found components for LIBMAGIC")
+      message (STATUS "LIBMAGIC_ROOT_DIR  = ${LIBMAGIC_ROOT_DIR}")
+      message (STATUS "LIBMAGIC_INCLUDES  = ${LIBMAGIC_INCLUDES}")
+      message (STATUS "LIBMAGIC_LIBRARIES = ${LIBMAGIC_LIBRARIES}")
+    endif (NOT LIBMAGIC_FIND_QUIETLY)
+  else (LIBMAGIC_FOUND)
+    if (LIBMAGIC_FIND_REQUIRED)
+      message (FATAL_ERROR "Could not find LIBMAGIC!")
+    endif (LIBMAGIC_FIND_REQUIRED)
+  endif (LIBMAGIC_FOUND)
+
+  ##____________________________________________________________________________
+  ## Mark advanced variables
+
+  mark_as_advanced (
+    LIBMAGIC_ROOT_DIR
+    LIBMAGIC_INCLUDES
+    LIBMAGIC_LIBRARIES
+    )
+
+endif (NOT LIBMAGIC_FOUND)