From 8b0a74a327fbecb12f3d32ecff1fa28a6a6c2a15 Mon Sep 17 00:00:00 2001 From: jthorn Date: Wed, 22 Jan 2003 12:27:46 +0000 Subject: * add support for sparse-matrix Jacobians ==> works! * change default in param.ccl to use this * change default in src/include/config.h to default to no longer link in LAPACK routines * update documentation git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/AHFinderDirect/trunk@931 f88db872-0e4f-0410-b76b-b9085cfa78c5 --- README.library | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 README.library (limited to 'README.library') diff --git a/README.library b/README.library new file mode 100644 index 0000000..2b7fad0 --- /dev/null +++ b/README.library @@ -0,0 +1,56 @@ +Library Configuration +===================== +$Header$ + +By default this thorn doesn't use any external libraries, and you +can ignore the instructions in this file. + +However, if this thorn is configured to use the LAPACK and BLAS +libraries (see README for details), then you need to configure Cactus +to use these libraries; this file describes how to do this. + +Basically, you just need to set + LAPACK=yes +when configuring your Cactus configuration. + +If all goes well, Cactus will find the LAPACK and BLAS libraries and give +during the configure process saying that it found them. Otherwise, the +configure process will abort with a message saying that you need to set +the configure variable LAPACK_DIR to a directory (or blank-separated list +of directories) containing the LAPACK and BLAS libraries. + +[If you don't have LAPACK/BLAS installed on your system already, you +can get Fortran 77 source code and/or binaries for various architectures, +from http://www.netlib.org/lapack/ and http://www.netlib.org/blas/ +respectively. But many systems have these installed already -- try +'locate liblapack' and 'locate libblas' on your system.] + +If the LAPACK and/or BLAS libraries were compiled with a (Fortran) +compiler which is *not* used to compile any part of this Cactus' +configuration, then you may also need to set the configure variables + LAPACK_EXTRA_LIBS = the name (or blank-separated list of names) of + that (Fortran) compiler's run-time support + library(ies) + LAPACK_EXTRA_LIB_DIRS = the directory (or blank-separated list of + directories) containing that library(ies) + +For example, if your LAPACK and/or BLAS were compiled with the GNU g77 +compiler (as is common on GNU/Linux and *BSD systems), and you are *not* +using g77 to compile any part of your Cactus configuration (maybe because +you're using a different Fortran compiler), then you may need to set the +environment variables to point to the g77 support library g2c: + LAPACK_EXTRA_LIBS = g2c + LAPACK_EXTRA_LIBDIRS = `g77 --print-file-name=libg2c.a | xargs basename` + +For example, on the AEI xeons the settings would be + LAPACK_EXTRA_LIBS = g2c + LAPACK_EXTRA_LIBDIRS = `g77 --print-file-name=libg2c.a | xargs dirname` + +All of these settings are of configure variables, i.e. you set them either +on the command line when configuring, + % gmake my-configuration LAPACK=yes +or as assignments in your ~/.cactus/config file, + % cat ~/.cactus/config + LAPACK=yes + LAPACK_EXTRA_LIBS=g2c + LAPACK_EXTRA_LIB_DIRS=/usr/lib/gcc-lib/i386-redhat-linux/2.96 -- cgit v1.2.3