[mlpack-git] master: When compiling, see if ARMA_64BIT_WORD is enabled. Store it in a file. This will tell the user (or us, the bug receivers) later if libmlpack.so has 32-bit uword or 64-bit uword. (60010ca)

[gitdub at big.cc.gt.atl.ga.us]

Repository : https://github.com/mlpack/mlpack

On branch  : master
Link       : https://github.com/mlpack/mlpack/compare/90a9d939482856608467bf174f824bc441ec2c21...60010cad2a8c3e3f52f69c10d8077a025255d6db

>---------------------------------------------------------------

commit 60010cad2a8c3e3f52f69c10d8077a025255d6db
Author: ryan <ryan at ratml.org>
Date:   Wed Apr 1 18:57:10 2015 -0400

    When compiling, see if ARMA_64BIT_WORD is enabled.
    Store it in a file.  This will tell the user (or us, the bug receivers) later if libmlpack.so has 32-bit uword or 64-bit uword.


>---------------------------------------------------------------

60010cad2a8c3e3f52f69c10d8077a025255d6db
 CMake/CreateArmaConfigInfo.cmake | 50 ++++++++++++++++++++++++++++++++++++++++
 CMakeLists.txt                   | 15 +++++++++++-
 2 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/CMake/CreateArmaConfigInfo.cmake b/CMake/CreateArmaConfigInfo.cmake
new file mode 100644
index 0000000..1f85ba9
--- /dev/null
+++ b/CMake/CreateArmaConfigInfo.cmake
@@ -0,0 +1,50 @@
+# Using the CMake tools to create the file arma_config.hpp, which contains
+# information on the Armadillo configuration when mlpack was compiled.  We'll
+# need to open the config.hpp we are using.
+if(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp")
+  file(READ "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp"
+      ARMA_CONFIG)
+
+  # Extract ARMA_64BIT_WORD.
+  string(REGEX MATCH
+      "[\r\n][ ]*#define ARMA_64BIT_WORD"
+      ARMA_HAS_64BIT_WORD_PRE
+      "${ARMA_CONFIG}")
+
+  string(LENGTH "${ARMA_HAS_64BIT_WORD_PRE}" ARMA_HAS_64BIT_WORD)
+
+  file(REMOVE ${CMAKE_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp)
+  file(WRITE ${CMAKE_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp
+"/**
+ * @file arma_config.hpp
+ *
+ * This is an autogenerated file which contains the configuration of Armadillo
+ * at the time mlpack was built.  If you modify anything in here by hand, your
+ * warranty is void, your house may catch fire, and we're not going to call the
+ * police when your program segfaults so hard that robbers come to your house
+ * and take everything you own.  If you do decide, against better judgment, to
+ * modify anything at all in this file, and you are reporting a bug, be
+ * absolutely certain to mention that you've done something stupid in this file
+ * first.
+ *
+ * In short: don't touch this file.
+ */
+#ifndef __MLPACK_CORE_UTIL_ARMA_CONFIG_HPP
+#define __MLPACK_CORE_UTIL_ARMA_CONFIG_HPP
+
+")
+  if(ARMA_HAS_64BIT_WORD EQUAL 0)
+    file(APPEND ${CMAKE_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp
+        "#define MLPACK_ARMA_NO_64BIT_WORD")
+  else(ARMA_HAS_64BIT_WORD EQUAL 0)
+    file(APPEND ${CMAKE_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp
+        "#define MLPACK_ARMA_64BIT_WORD")
+  endif(ARMA_HAS_64BIT_WORD EQUAL 0)
+
+  file(APPEND ${CMAKE_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp
+      "\n\n#endif\n")
+
+else(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp")
+  message(WARNING "Armadillo configuration file
+      (${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp) does not exist!")
+endif(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp")
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a86d54..1ef46a1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -262,7 +262,6 @@ endif (WIN32)
 
 # Determine whether or not this is a git repository, so that we can set the
 # version number if necessary.
-
 find_package(Git)
 set (USING_GIT "NO")
 if (GIT_FOUND)
@@ -298,6 +297,20 @@ if (USING_GIT STREQUAL "YES")
   add_dependencies(mlpack mlpack_gitversion)
 endif (USING_GIT STREQUAL "YES")
 
+# Create a target to generate arma_config.hpp, which is used to warn the user
+# when they are doing something stupid when linking something against mlpack.
+include(CMake/CreateArmaConfigInfo.cmake)
+
+add_custom_target(mlpack_arma_config ALL
+    COMMAND ${CMAKE_COMMAND}
+        -D ARMADILLO_INCLUDE_DIR="${ARMADILLO_INCLUDE_DIR}"
+        -P CMake/CreateArmaConfigInfo.cmake
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    COMMENT "Updating arma_config.hpp (if necessary)")
+set(MLPACK_SRCS ${MLPACK_SRCS}
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/mlpack/core/util/arma_config.hpp")
+add_dependencies(mlpack mlpack_arma_config)
+
 # Make a target to generate the documentation.  If Doxygen isn't installed, then
 # I guess this option will just be unavailable.
 find_package(Doxygen)