Merge topic 'FindArmadillo-wrappers'

38c6dd7b19 FindArmadillo: Add support for non-wrapper case

Acked-by: Kitware Robot <[email protected]>
Merge-request: !4418

Modules/FindArmadillo.cmake

@@ -6,7 +6,7 @@ FindArmadillo
 -------------
 
 Find the Armadillo C++ library.
-Armadillo is library for linear algebra & scientific computing.
+Armadillo is a library for linear algebra & scientific computing.
 
 Using Armadillo:
 
@@ -31,19 +31,13 @@ This module sets the following variables:
   ARMADILLO_VERSION_NAME - name of the version (ex: "Antipodean Antileech")
 #]=======================================================================]
 
-# UNIX paths are standard, no need to write.
-find_library(ARMADILLO_LIBRARY
-  NAMES armadillo
-  PATHS "$ENV{ProgramFiles}/Armadillo/lib"  "$ENV{ProgramFiles}/Armadillo/lib64" "$ENV{ProgramFiles}/Armadillo"
-  )
 find_path(ARMADILLO_INCLUDE_DIR
   NAMES armadillo
   PATHS "$ENV{ProgramFiles}/Armadillo/include"
   )
-
+mark_as_advanced(ARMADILLO_INCLUDE_DIR)
 
 if(ARMADILLO_INCLUDE_DIR)
-
   # ------------------------------------------------------------------------
   #  Extract version information from <armadillo>
   # ------------------------------------------------------------------------
@@ -59,32 +53,79 @@ if(ARMADILLO_INCLUDE_DIR)
   if(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/arma_version.hpp")
 
     # Read and parse armdillo version header file for version number
-    file(STRINGS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/arma_version.hpp" _armadillo_HEADER_CONTENTS REGEX "#define ARMA_VERSION_[A-Z]+ ")
-    string(REGEX REPLACE ".*#define ARMA_VERSION_MAJOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MAJOR "${_armadillo_HEADER_CONTENTS}")
-    string(REGEX REPLACE ".*#define ARMA_VERSION_MINOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MINOR "${_armadillo_HEADER_CONTENTS}")
-    string(REGEX REPLACE ".*#define ARMA_VERSION_PATCH ([0-9]+).*" "\\1" ARMADILLO_VERSION_PATCH "${_armadillo_HEADER_CONTENTS}")
+    file(STRINGS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/arma_version.hpp" _ARMA_HEADER_CONTENTS REGEX "#define ARMA_VERSION_[A-Z]+ ")
+    string(REGEX REPLACE ".*#define ARMA_VERSION_MAJOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MAJOR "${_ARMA_HEADER_CONTENTS}")
+    string(REGEX REPLACE ".*#define ARMA_VERSION_MINOR ([0-9]+).*" "\\1" ARMADILLO_VERSION_MINOR "${_ARMA_HEADER_CONTENTS}")
+    string(REGEX REPLACE ".*#define ARMA_VERSION_PATCH ([0-9]+).*" "\\1" ARMADILLO_VERSION_PATCH "${_ARMA_HEADER_CONTENTS}")
 
     # WARNING: The number of spaces before the version name is not one.
-    string(REGEX REPLACE ".*#define ARMA_VERSION_NAME +\"([0-9a-zA-Z _-]+)\".*" "\\1" ARMADILLO_VERSION_NAME "${_armadillo_HEADER_CONTENTS}")
+    string(REGEX REPLACE ".*#define ARMA_VERSION_NAME\ +\"([0-9a-zA-Z\ _-]+)\".*" "\\1" ARMADILLO_VERSION_NAME "${_ARMA_HEADER_CONTENTS}")
 
-    unset(_armadillo_HEADER_CONTENTS)
   endif()
 
   set(ARMADILLO_VERSION_STRING "${ARMADILLO_VERSION_MAJOR}.${ARMADILLO_VERSION_MINOR}.${ARMADILLO_VERSION_PATCH}")
 endif ()
 
+if(EXISTS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp")
+  file(STRINGS "${ARMADILLO_INCLUDE_DIR}/armadillo_bits/config.hpp" _ARMA_CONFIG_CONTENTS REGEX "^#define ARMA_USE_[A-Z]+")
+  string(REGEX MATCH "ARMA_USE_WRAPPER" _ARMA_USE_WRAPPER "${_ARMA_CONFIG_CONTENTS}")
+  string(REGEX MATCH "ARMA_USE_LAPACK" _ARMA_USE_LAPACK "${_ARMA_CONFIG_CONTENTS}")
+  string(REGEX MATCH "ARMA_USE_BLAS" _ARMA_USE_BLAS "${_ARMA_CONFIG_CONTENTS}")
+  string(REGEX MATCH "ARMA_USE_ARPACK" _ARMA_USE_ARPACK "${_ARMA_CONFIG_CONTENTS}")
+  string(REGEX MATCH "ARMA_USE_HDF5" _ARMA_USE_HDF5 "${_ARMA_CONFIG_CONTENTS}")
+endif()
+
 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
+
+# If _ARMA_USE_WRAPPER is set, then we just link to armadillo, but if it's not then we need support libraries instead
+set(_ARMA_SUPPORT_LIBRARIES)
+
+if(_ARMA_USE_WRAPPER)
+  # Link to the armadillo wrapper library.
+  find_library(ARMADILLO_LIBRARY
+    NAMES armadillo
+    PATHS
+      "$ENV{ProgramFiles}/Armadillo/lib"
+      "$ENV{ProgramFiles}/Armadillo/lib64"
+      "$ENV{ProgramFiles}/Armadillo"
+    )
+  mark_as_advanced(ARMADILLO_LIBRARY)
+  set(_ARMA_REQUIRED_VARS ARMADILLO_LIBRARY)
+else()
+  # Link directly to individual components.
+  set(ARMADILLO_LIBRARY "")
+  foreach(pkg
+      LAPACK
+      BLAS
+      ARPACK
+      HDF5
+      )
+    if(_ARMA_USE_${pkg})
+      find_package(${pkg} QUIET)
+      list(APPEND _ARMA_REQUIRED_VARS "${pkg}_FOUND")
+      if(${pkg}_FOUND)
+        list(APPEND _ARMA_SUPPORT_LIBRARIES ${${pkg}_LIBRARIES})
+      endif()
+    endif()
+  endforeach()
+endif()
+
 find_package_handle_standard_args(Armadillo
-  REQUIRED_VARS ARMADILLO_LIBRARY ARMADILLO_INCLUDE_DIR
+  REQUIRED_VARS ARMADILLO_INCLUDE_DIR ${_ARMA_REQUIRED_VARS}
   VERSION_VAR ARMADILLO_VERSION_STRING)
-# version_var fails with cmake < 2.8.4.
 
 if (ARMADILLO_FOUND)
   set(ARMADILLO_INCLUDE_DIRS ${ARMADILLO_INCLUDE_DIR})
-  set(ARMADILLO_LIBRARIES ${ARMADILLO_LIBRARY})
+  set(ARMADILLO_LIBRARIES ${ARMADILLO_LIBRARY} ${_ARMA_SUPPORT_LIBRARIES})
 endif ()
 
-# Hide internal variables
-mark_as_advanced(
-  ARMADILLO_INCLUDE_DIR
-  ARMADILLO_LIBRARY)
+# Clean up internal variables
+unset(_ARMA_REQUIRED_VARS)
+unset(_ARMA_SUPPORT_LIBRARIES)
+unset(_ARMA_USE_WRAPPER)
+unset(_ARMA_USE_LAPACK)
+unset(_ARMA_USE_BLAS)
+unset(_ARMA_USE_ARPACK)
+unset(_ARMA_USE_HDF5)
+unset(_ARMA_CONFIG_CONTENTS)
+unset(_ARMA_HEADER_CONTENTS)