search for: dpotrs

...ran function DPOSV, when compiled with the new gfortran and with -O2. To see the problem, one can just look at the disassembly of DPOSV (LAPACK), neither the package nor R is not necessary: SUBROUTINE DPOSV( UPLO, N, NRHS, A, LDA, B, LDB, INFO ) CHARACTER????????? UPLO In one case, DPOSV calls DPOTRS before returning. The new gfortran with -O2 performs tail-call optimization, jumping to DPOTRS. In the annotated disassembly snippet, at 11747f1, DPOSV tries to ensure that there is constant 1 as string length of UPLO when tail-calling into DPOTRS, so it writes it to stack where there already s...

Hi, I have tried to pinpoint potential problems which could lead to the LAPACK issues that are currently seen in R. I built the current R trunk using AR=gcc-ar RANLIB=gcc-ranlib ./configure --prefix=$HOME --enable-lto --enable-BLAS-shlib=no --without-recommended-packages and used this to find problem areas. There are quite a few warnings that were flagged, due to mismatches in function

...arrying the > patch to configure. Thanks. Btw, Tomas just told R Core that ********************************************************************* I had a quick look at reference lapack builds in different distributions: looking at the disassembly, and specifically for dposv tail-calling into dpotrs. I checked the latest packages from Fedora 30, Fedora Rawhide (the same?), Ubuntu 19.04, Debian Sid, OpenSuse Leap 42.3. None of the builds had that problem (yet). I've been looking for the packages via pkgs.org. ********************************************************************* so we sho...

...18:31, Kurt Hornik wrote: | Thanks. Btw, Tomas just told R Core that | | ********************************************************************* | I had a quick look at reference lapack builds in different | distributions: looking at the disassembly, and specifically for dposv | tail-calling into dpotrs. I checked the latest packages from Fedora 30, | Fedora Rawhide (the same?), Ubuntu 19.04, Debian Sid, OpenSuse Leap | 42.3. None of the builds had that problem (yet). I've been looking for | the packages via pkgs.org. | ********************************************************************* |...

>>>>> Dirk Eddelbuettel writes: > On 10 May 2019 at 10:52, Johannes Ranke wrote: > | Thanks, that sounds good. But I need some help as I do not know much about > | autoconf and Debian packaging: Is it enough to patch configure.ac (r76467) or > | do we need to update configure as well (r76468)? > Again, that would happen in the sources you pick up from me, and per