On Wed, Dec 16, 2009 at 03:34:54PM +0100, Johannes Ring wrote: > On Wed, Dec 16, 2009 at 3:20 PM, Anders Logg <[email protected]> wrote: > > On Wed, Dec 16, 2009 at 01:12:14PM +0100, Johannes Ring wrote: > >> On Wed, Dec 16, 2009 at 1:00 PM, Anders Logg <[email protected]> wrote: > >> > On Wed, Dec 16, 2009 at 12:51:37PM +0100, Johannes Ring wrote: > >> >> On Wed, Dec 16, 2009 at 12:36 PM, Anders Logg <[email protected]> wrote: > >> >> > On Wed, Dec 16, 2009 at 12:01:01PM +0100, Johannes Ring wrote: > >> >> >> On Wed, Dec 16, 2009 at 11:50 AM, Johannes Ring <[email protected]> > >> >> >> wrote: > >> >> >> > On Wed, Dec 16, 2009 at 10:47 AM, Anders Logg <[email protected]> > >> >> >> > wrote: > >> >> >> >> Is anyone else able to compile and link the test in > >> >> >> >> > >> >> >> >> sandbox/misc/ > >> >> >> >> > >> >> >> >> ? > >> >> >> > > >> >> >> > It compiles fine on my system. I can also run the demo but when I > >> >> >> > press 'q' to exit the plot I get a segmentation fault. > >> >> >> > >> >> >> Also: > >> >> >> > >> >> >> joha...@simula-x61:~$ nm -D /usr/lib/liblapack.so | grep dgels_ > >> >> >> 00191a70 T dgels_ > >> >> >> joha...@simula-x61:~$ dpkg -S /usr/lib/liblapack.so > >> >> >> liblapack-dev: /usr/lib/liblapack.so > >> >> >> joha...@simula-x61:~$ > >> >> > > >> >> > ok, good. I thought that DGLES was missing from the standard Ubuntu > >> >> > LAPACK. > >> >> > > >> >> > Do we have a test for LAPACK or should we add one? The buildbot is > >> >> > failing. > >> >> > >> >> No, we don't have a test for LAPACK but several of the other > >> >> pkg-config generators adds -llapack to their pkg-config files. Maybe > >> >> we should add pkg-config generator for LAPACK and then add 'Requires: > >> >> lapack' in the other pkg-config files instead. > >> > > >> > Thats sounds like a good idea. > >> > > >> > Should I create a simple test program for LAPACK or what do you need > >> > to create the test? > >> > >> Yes, a minimal test program would be good. Also, do you know how to > >> find the LAPACK version? > >> > >> Johannes > > > > Here's a simple test program: > > > > extern "C" > > { > > void dgels_(char* trans, int* m, int* n, int* nrhs, > > double* a, int* lda, double* b, int* ldb, > > double* work, int* lwork, int* info); > > } > > > > int main() > > { > > double A[4] = {1, 0, 0, 1}; > > double b[2] = {1, 1}; > > > > char trans = 'N'; > > int m = 2; > > int n = 2; > > int nrhs = 1; > > int lda = 2; > > int ldb = 2; > > int lwork = 4; > > int status = 0; > > double* work = new double[m*lwork]; > > > > dgels_(&trans, &m, &n, &nrhs, > > A, &lda, b, &ldb, > > work, &lwork, &status); > > > > delete [] work; > > > > return status; > > } > > > > On my machine, this compiles with > > > > g++ main.cpp -L/usr/lib/atlas -llapack > > Thanks! > > > I have no idea how to find the LAPACK version but as far as I know, > > most of the interface of LAPACK has been fixed the last 30 years or so > > so I assume we don't need to worry too much about that. > > Yes, thats true. I will assume version 3.0 in the pkg-config file then. > > Is LAPACK now a required or optional dependency? If the latter, should > it be enabled by default or only if one of the other optional > dependencies requires it? > > Johannes
I'm not sure. It's not an issue for me (since I'm running on Ubuntu) but it's also not a big problem to add some #ifdef HAS_LAPACK in the code so maybe we can have it as an optional dependency. Just let me know when the HAS_LAPACK flag is available and I can try and add it in the right places. -- Anders
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