== Patch provided by Brad King from Kitware - brad.king@kitware.com ==

Provide CMake packages for both LAPACK and LAPACKE

Teach "lapack-config.cmake" to provide variables

 LAPACK_blas_LIBRARIES
 LAPACK_lapack_LIBRARIES

that contain either the target names when using the reference
implementation or the system libraries found for them.

Configure a "lapacke-config.cmake" file for the build and install
trees to package LAPACKE.  Teach it to load the LAPACK package
installed with it.  Provide variables

 LAPACKE_INCLUDE_DIRS
 LAPACKE_LIBRARIES

containing the header file search path for lapacke headers
and the list of lapacke library targets.

This requires CMake 2.8.10 to separate the installation export
for the lapacke library from the other targets.

1 files changed, 29 insertions, 7 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb4a3658..0ab93224 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,8 @@
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 2.8.10)
 project(LAPACK Fortran)
 
+set(LAPACK_VERSION 3.4.2)
+
 # Configure the warning and code coverage suppression file
 configure_file( 
   "${LAPACK_SOURCE_DIR}/CTestCustom.cmake.in"
@@ -31,8 +33,11 @@ if (PYTHONINTERP_FOUND)
 endif()
 # --------------------------------------------------
 
+set(LAPACK_INSTALL_EXPORT_NAME lapack-targets)
+
 macro(lapack_install_library lib)
-  install(TARGETS ${lib} EXPORT lapack-targets
+  install(TARGETS ${lib}
+    EXPORT ${LAPACK_INSTALL_EXPORT_NAME}
     ARCHIVE DESTINATION lib${LIB_SUFFIX}
     LIBRARY DESTINATION lib${LIB_SUFFIX}
     RUNTIME DESTINATION bin
@@ -203,7 +208,6 @@ endif(LAPACKE)
 SET(CPACK_PACKAGE_NAME "LAPACK")
 SET(CPACK_PACKAGE_VENDOR "University of Tennessee, Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd")
 SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LAPACK- Linear Algebra Package")
-set(LAPACK_VERSION 3.4.2)
 set(CPACK_PACKAGE_VERSION_MAJOR 3)
 set(CPACK_PACKAGE_VERSION_MINOR 4)
 set(CPACK_PACKAGE_VERSION_PATCH 2)
@@ -245,11 +249,32 @@ if(BUILD_TESTING OR LAPACKE_WITH_TMG)
   set(ALL_TARGETS ${ALL_TARGETS} tmglib)
 endif(BUILD_TESTING OR LAPACKE_WITH_TMG)
 
+# Export lapack targets, not including lapacke, from the
+# install tree, if any.
+set(_lapack_config_install_guard_target "")
+if(ALL_TARGETS)
+  install(EXPORT lapack-targets
+    DESTINATION lib/cmake/lapack-${LAPACK_VERSION})
+
+  # Choose one of the lapack targets to use as a guard for
+  # lapack-config.cmake to load targets from the install tree.
+  list(GET ALL_TARGETS 0 _lapack_config_install_guard_target)
+endif()
+
+# Include lapacke in targets exported from the build tree.
 if(LAPACKE)
   set(ALL_TARGETS ${ALL_TARGETS} lapacke)
 endif(LAPACKE)
 
-export(TARGETS ${ALL_TARGETS} FILE lapack-targets.cmake)
+# Export lapack and lapacke targets from the build tree, if any.
+set(_lapack_config_build_guard_target "")
+if(ALL_TARGETS)
+  export(TARGETS ${ALL_TARGETS} FILE lapack-targets.cmake)
+
+  # Choose one of the lapack or lapacke targets to use as a guard
+  # for lapack-config.cmake to load targets from the build tree.
+  list(GET ALL_TARGETS 0 _lapack_config_build_guard_target)
+endif()
 
 configure_file(${LAPACK_SOURCE_DIR}/CMAKE/lapack-config-version.cmake.in
   ${LAPACK_BINARY_DIR}/lapack-config-version.cmake @ONLY)
@@ -270,6 +295,3 @@ install(FILES
   ${LAPACK_BINARY_DIR}/lapack-config-version.cmake
   DESTINATION lib/cmake/lapack-${LAPACK_VERSION}
   )
-
-install(EXPORT lapack-targets
-  DESTINATION lib/cmake/lapack-${LAPACK_VERSION})