Recent changes to support-requests

#4 printing blitz arrays via GDB

Sylwester Arabas — Sun, 10 May 2020 12:25:08 -0000

status: open --> closed

#4 printing blitz arrays via GDB

Sylwester Arabas — Sun, 10 May 2020 07:06:29 -0000

Hello!

Note that for two years now, maintanance of Blitz++ has been carried out on Github:
https://github.com/blitzpp/blitz/
Please, could you repost the questions at the Blitz issue tracker there:
https://github.com/blitzpp/blitz/issues/new

Thanks!
Sylwester

printing blitz arrays via GDB

CutePoison — Sat, 09 May 2020 07:01:41 -0000

Dear team BLITZ,
We are a team from Qualcomm and have been using Blitz arrays for some of the modeling problems.
We would like your inputs on a couple of queries related to blitz usage.

It is very useful that Blitz supports printing any multidimensional arrays with a very simple statement as below
std::cout<<blitz_array_name<<std::endl

We are working on a large codebase, and we would like to print the array contents during the debug sessions as well.
We use GDB for debugging. We tried an option as below

a) overloaded functions for different type of arrays which we like to print, as below
void printBlitz(blitz::Array<bool, 1=""> &in)
{
std::cout<<in<<std::endl;
}</bool,>

void printBlitz(blitz::Array<int, 1=""> &in)
{
std::cout<<in<<std::endl;
}</int,>

... and so on
on the gdb debugger, we can simply call this function as below

(gdb) call printBlitz(blitz_array_name)

The issue now is we use many types of multi-dimensional arrays (including complex), we have to make overloads for every possible array
Could you help suggest how we can overcome this by using templates in c++ for blitz types, something like below

template <typename t="">
void printBlitz(blitz::Array<<t>, 1> &in)</t></typename>

template <typename t="">
void printBlitz(blitz::Array<<t>, 2> &in)</t></typename>

or if we can template both type and array size, it is only required from a print perspective.
In parallel, we are finding out how to call c++ template functions via GDB.

Alternately, if you have any suggestions to directly print the blitz contents via GDB, please let us know.

This will simplify our debug to a large extent.
Any suggestion is highly appreciated

Thank you so much in advance !!

printing blitz arrays via GDB

CutePoison — Sat, 09 May 2020 07:01:41 -0000

Ticket 4 has been modified: printing blitz arrays via GDB
Edited By: Sylwester Arabas (slayoo)
Status updated: u'open' => u'closed'

segmentation fault while creating an array

Anonymous — Wed, 10 May 2006 10:04:53 -0000

I get a segmentation error in this line:

Array<double,2> arr_diff(m_iPixels, 3);

while m_iPixels being a member variable of the class in
which this line is used. its value is in the range of
1000 to 100000.

It crashes in line 62 of Storage.h:

GeneralArrayStorage()
{
for (int i=0; i < N_rank; ++i)
ordering_(i) = N_rank - 1 - i;
ascendingFlag_ = true;
base_ = 0; <-------
}

The debugger shows: data_= 3, 3

Problem linking VS2005 Express Edition

rafa_callejas — Wed, 12 Apr 2006 05:11:56 -0000

Hello,
I'm trying to build the Blitz++ library in VS2005,
using Jan Kuiken's Visual C++ 2005 Express
Edition .sln. I compile the solution without errors
but in the linking process I get:

LINK : fatal error LNK1104: cannot open
file '../release/blitz.lib'

How can I solve the problem?

Thanks!!

Install for Mac OS X

Anonymous — Tue, 06 Apr 2004 15:22:15 -0000

Does anyone have an install script or tips to build Blitz++
on Mac OS X?

configure went fine, as did make check-testsuite but make
failed here:
=============================
texi2dvi `test -f 'blitz.texi' || echo './'`blitz.texi
stdin:50: warning: @menu seen before first @node,
creating `Top' node.
stdin:50: warning: perhaps your @top node should be
wrapped in @ifnottex rather than @ifinfo?.
./arrays-stencils.texi:299: Unknown command `nabla'.
./arrays-stencils.texi:321: Unknown command `nabla'.
./arrays-stencils.texi:393: Unknown command `nabla'.
./arrays-stencils.texi:393: Unknown command `times'.
./arrays-stencils.texi:441: Unknown command `nabla'.
./arrays-stencils.texi:441: Unknown command `cdot'.
stdin:50: Next field of node `Top' not pointed to.
./about.texi:2: This node (about) has the bad Prev.
/usr/bin/texi2dvi: tex: command not found
/usr/bin/texi2dvi: tex exited with bad status, quitting.
/usr/bin/texi2dvi: see blitz.log for errors.
make[2]: *** [blitz.dvi] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

make check-examples failed here:

/bin/sh ../libtool --mode=link g++ -o array array.o -L../
lib -lblitz -lm
libtool: link: cannot find the library `'
make[1]: *** [array] Error 1
make: *** [check-examples] Error 1

make check-benchmarks failed here:

c -o fdaxpy.o `test -f 'fdaxpy.f' || echo './'`fdaxpy.f
/bin/sh: c: command not found
make[1]: [fdaxpy.o] Error 127 (ignored)
c -o fidaxpy.o `test -f 'fidaxpy.f' || echo './'`fidaxpy.f
/bin/sh: c: command not found
make[1]: [fidaxpy.o] Error 127 (ignored)
/bin/sh ../libtool --mode=link g++ -I.. -O2 -funroll-loops
-o daxpy daxpy.o fdaxpy.o fidaxpy.o -L../lib -lblitz -lm
mkdir .libs
libtool: link: cannot find the library `'
make[1]: *** [daxpy] Error 1
make: *** [check-benchmarks] Error 1

I'm not a UNIX/binutils Guru so if anyone has any ideas
then please let me know.

Michael (mwh_acs@hotmail.com)