LAPACK - Revision history

Jopo9795 at 22:28, 15 April 2021

2021-04-15T22:28:08Z

2021-04-15T22:26:36Z

‎Provide instructions for compiling LAPACK in an out-of-tree directory and linking the libraries to be called within PHASTA.

2021-04-15T22:02:58Z

@@ Line 30: / Line 30: @@
                                            "${LAPACKBLAS_DIR}libblas.a")
 endif(PHASTA_USE_LAPACK)  </nowiki>
-This chunk of code should be placed near the end of the CMakeLists.txt file just above the configure_file() command is called. Note that the order in which the liblapack.a and libblas.a files are listed in the target_link_libraries() command must be preserved since the LAPACK library has dependencies on BLAS.
+This chunk of code should be placed near the end of the CMakeLists.txt file just above where the configure_file() command is called. Note that the order in which the liblapack.a and libblas.a files are listed in the target_link_libraries() command must be preserved since the LAPACK library has dependencies on BLAS.
 PHASTA is now ready to be built in your preferred directory. When calling LAPACK subroutines, be sure to use the version of the routine that corresponds to the datatype object being considered. For example, if you are trying to perform an eigen-decomposition of a real-valued double precision matrix, you would call the DGEEV routine (D for double) as opposed to the SGEEV routine (S for single precision).

@@ Line 17: / Line 17: @@
 == Modify CMakeLists.txt File ==
-Add the following flags to the build script that you would normally execute when compiling PHASTA
+Add the following flags to the build script that you would normally execute when compiling PHASTA.
   <nowiki>
 -DPHASTA_USE_LAPACK=ON \
 -DLAPACKBLAS_DIR=</path/to/build_lapack_dir>/lib/ \ </nowiki>

@@ Line 1: / Line 1: @@
 == Download and Build LAPACK ==
-. Download LAPACK tarball from http://netlib.org/lapack/ and extract the files to the desired folder with <code> tar -xf <name_of_tarball> </code>. Note that for the current method, the location of the unpacked folder does not need to be within the PHASTA source directory.
+First download LAPACK tarball from http://netlib.org/lapack/ and extract the files with <code> tar -xf <name_of_tarball> </code>, which produced folder 'lapack-3.9.1' for this example. Note that for the current method, the location of the unpacked folder does not need to be within the PHASTA source directory.
-<code> cp <lapack_dir>/make.inc.example <lapack_dir>/make.inc </code>
+Create a copy of the provided make include file with
-. Create a build directory at the same level as the LAPACK folder and execute the following build script within the build directory:
+At the same level as the lapack-3.9.1 folder, create and change to a build directory, <build_lapack_dir> and execute the following from within the build directory, followed by <code> make -j </code>.
-<code>
+ <nowiki>
 #!/bin/bash
 cmake \
@@ Line 11: / Line 12: @@
 -DCMAKE_Fortran_COMPILER=gfortran \
 -DCMAKE_BUILD_TYPE=Release \
-../<lapack_dir>
+../lapack-3.9.1 </nowiki>
-</code>