Merge pull request #531 from martin-frbg/issue530

 Use cmake builtin tool for "env" to ensure cross-platform compatibility

Author: langou

CMakeLists.txt

@@ -381,9 +381,8 @@ if (BLAS++)
   include(ExternalProject)
   ExternalProject_Add(blaspp
 	  URL https://bitbucket.org/icl/blaspp/downloads/blaspp-2020.10.02.tar.gz
-	  #	  CMAKE_ARGS "-DUSE_CMAKE_FIND_BLAS=ON -DLIBRARY_PATH=${CMAKE_BINARY_DIR}"
-	  CONFIGURE_COMMAND env LIBRARY_PATH=${CMAKE_BINARY_DIR}/lib LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR} -DCMAKE_INSTALL_LIBDIR=lib -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} ${PROJECT_BINARY_DIR}/blaspp-prefix/src/blaspp
-	  BUILD_COMMAND env LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib LIB_SUFFIX="" make
+	  CONFIGURE_COMMAND ${CMAKE_COMMAND} -E env LIBRARY_PATH=${CMAKE_BINARY_DIR}/lib LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR} -DCMAKE_INSTALL_LIBDIR=lib -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} ${PROJECT_BINARY_DIR}/blaspp-prefix/src/blaspp
+	  BUILD_COMMAND ${CMAKE_COMMAND} -E env LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib LIB_SUFFIX="" make
 	  INSTALL_COMMAND make PREFIX=${PROJECT_BINARY_DIR} LIB_SUFFIX="" install
 	  )
   ExternalProject_Add_StepDependencies(blaspp build ${BLAS_LIBRARIES})
@@ -395,8 +394,8 @@ if (LAPACK++)
   if (BUILD_SHARED_LIBS)
   ExternalProject_Add(lapackpp
 	  URL https://bitbucket.org/icl/lapackpp/downloads/lapackpp-2020.10.02.tar.gz
-	  CONFIGURE_COMMAND env LIBRARY_PATH=${CMAKE_BINARY_DIR}/lib LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR} -DCMAKE_INSTALL_LIBDIR=lib -DLAPACK_LIBRARIES=${LAPACK_LIBRARIES} -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}  ${PROJECT_BINARY_DIR}/lapackpp-prefix/src/lapackpp
-	  BUILD_COMMAND env LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib LIB_SUFFIX="" make
+	  CONFIGURE_COMMAND ${CMAKE_COMMAND} -E env LIBRARY_PATH=${CMAKE_BINARY_DIR}/lib LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR} -DCMAKE_INSTALL_LIBDIR=lib -DLAPACK_LIBRARIES=${LAPACK_LIBRARIES} -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}  ${PROJECT_BINARY_DIR}/lapackpp-prefix/src/lapackpp
+	  BUILD_COMMAND ${CMAKE_COMMAND} -E env LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib LIB_SUFFIX="" make
 	  INSTALL_COMMAND make PREFIX=${PROJECT_BINARY_DIR} LIB_SUFFIX="" install
 	  )
   else ()