Initial change to support external dependency management via cmake. Proof of work, just for crypto++ dependency. Not yet functional.

cmake/FindCryptoPP.cmake

@@ -0,0 +1,107 @@
+# Module for locating the CryptoPP encryption library.
+#
+# Cutomizable variables:
+#   CRYPTOPP_ROOT_DIR
+#     This variable points to the CryptoPP root directory. On Windows the
+#     library location typically will have to be provided explicitly using the
+#     -D command-line option. The directory should include the include/cryptopp,
+#     lib and/or bin sub-directories.
+#
+# Read-Only variables:
+#   CRYPTOPP_FOUND
+#     Indicates that the library has been found.
+#
+#   CRYPTOPP_INCLUDE_DIR
+#     Points to the CryptoPP include directory.
+#
+#   CRYPTOPP_LIBRARIES
+#     Points to the CryptoPP libraries that should be passed to
+#     target_link_libararies.
+#
+# Copyright (c) 2010-2011 Sergiu Dotenco
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+INCLUDE (FindPackageHandleStandardArgs)
+
+SET (_CRYPTOPP_POSSIBLE_DIRS ${CRYPTOPP_ROOT_DIR})
+SET (_CRYPTOPP_POSSIBLE_INCLUDE_SUFFIXES include)
+SET (_CRYPTOPP_POSSIBLE_LIB_SUFFIXES /lib /lib64)
+
+FIND_PATH (CRYPTOPP_ROOT_DIR
+  NAMES include/cryptopp/cryptlib.h
+  PATHS ${_CRYPTOPP_POSSIBLE_DIRS}
+  DOC "CryptoPP root directory")
+
+# Re-use the previous path:
+FIND_PATH (CRYPTOPP_INCLUDE_DIR
+  NAMES cryptopp/cryptlib.h
+  PATHS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES ${_CRYPTOPP_POSSIBLE_INCLUDE_SUFFIXES}
+  DOC "CryptoPP include directory")
+
+  FIND_LIBRARY (CRYPTOPP_LIBRARIES
+    NAMES cryptlib cryptopp libcryptopp
+    PATHS /usr/lib
+    PATH_SUFFIXES "" lib64)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS (CryptoPP DEFAULT_MSG CRYPTOPP_INCLUDE_DIR
+  CRYPTOPP_LIBRARIES)
+
+IF (CRYPTOPP_FOUND)
+  FILE (STRINGS ${CRYPTOPP_INCLUDE_DIR}/cryptopp/config.h
+    _CRYPTOPP_VERSION_TMP REGEX "^#define CRYPTOPP_VERSION[ \t]+[0-9]+$")
+
+  STRING (REGEX REPLACE
+    "^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION_TMP
+    ${_CRYPTOPP_VERSION_TMP})
+
+  STRING (REGEX REPLACE "([0-9]+)[0-9][0-9]" "\\1" CRYPTOPP_VERSION_MAJOR
+    ${_CRYPTOPP_VERSION_TMP})
+  STRING (REGEX REPLACE "[0-9]([0-9])[0-9]" "\\1" CRYPTOPP_VERSION_MINOR
+    ${_CRYPTOPP_VERSION_TMP})
+  STRING (REGEX REPLACE "[0-9][0-9]([0-9])" "\\1" CRYPTOPP_VERSION_PATCH
+    ${_CRYPTOPP_VERSION_TMP})
+
+  SET (CRYPTOPP_VERSION_COUNT 3)
+  SET (CRYPTOPP_VERSION
+    ${CRYPTOPP_VERSION_MAJOR}.${CRYPTOPP_VERSION_MINOR}.${CRYPTOPP_VERSION_PATCH})
+ENDIF (CRYPTOPP_FOUND)
+
+IF (CRYPTOPP_FOUND)
+  IF (NOT CRYPTOPP_CACHED)
+    IF (NOT PACKAGE_FIND_QUIETLY)
+      MESSAGE (STATUS "CryptoPP version: ${CRYPTOPP_VERSION}")
+    ENDIF (NOT PACKAGE_FIND_QUIETLY)
+
+    SET (CRYPTOPP_CACHED TRUE CACHE INTERNAL "" FORCE)
+  ENDIF (NOT CRYPTOPP_CACHED)
+ELSE (CRYPTOPP_FOUND)
+  SET (CRYPTOPP_CACHED FALSE CACHE INTERNAL "" FORCE)
+
+  IF (NOT PACKAGE_FIND_QUIETLY)
+    IF (PACKAGE_FIND_REQUIRED)
+      MESSAGE (FATAL_ERROR
+        "CryptoPP required but some files were not found. "
+        "Specify the CryptPP location using CRYPTOPP_ROOT_DIR")
+    ENDIF (PACKAGE_FIND_REQUIRED)
+  ENDIF (NOT PACKAGE_FIND_QUIETLY)
+ENDIF (CRYPTOPP_FOUND)
+
+MARK_AS_ADVANCED (CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARIES)