01-24-2013
What are you trying to do with your new makefiles that the old ones couldn't do? If all you want is a central point of control, make -C can do that.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I have concatenated 2 makefiles, to produce 1 however it is not running all of the code, producing a fatal error: symbol referencing errors. No output written. Can anybody please help? (4 Replies)
Discussion started by: Dan Rooney
4 Replies
2. UNIX for Dummies Questions & Answers
I need to develop a makefile that spans across directories. For example, let's say i have an upper level directory (main) and about 2 subdirectories. I want my .cpp files and .o files to be in one subdirectory. I want my .a files to be in the other subdirectory. The .a files are made up of the... (0 Replies)
Discussion started by: benjie_asu
0 Replies
3. Shell Programming and Scripting
for example in my make file im building path from env variables and string but need to see what is did
what is the best way to print the result?
say I have in my Makefile :
exec_prefix = $(RUN_ENV_LOCAL)/apache
and I will like to print the exec_prefix value , how can it be done ? (1 Reply)
Discussion started by: umen
1 Replies
4. UNIX for Advanced & Expert Users
Solved........ (0 Replies)
Discussion started by: klam
0 Replies
5. UNIX for Dummies Questions & Answers
Are the programs written on schedulers ,thread library , process management, memory management, et al called systems programs ? How are they different from the programs that implement functions like open() , printf() , scanf() , read() .. they have a prefix sys_open, sys_close, sys_read etc , right... (1 Reply)
Discussion started by: vishwamitra
1 Replies
6. Programming
I have several programs in several directories and want to use make to build the executables. What I have done is to put the main programs in their own directory together with a makefile to build the program. Then I am thinking of having another makefile residing in the directory above so I can run... (1 Reply)
Discussion started by: kristinu
1 Replies
7. Programming
I have the following part of a makefile and want to simplify it
using rules rather than having to code the same two blocks
when I need ti build another program.
An having difficulty doing it
all: 1dvel2 1dvel 2dvel
... (8 Replies)
Discussion started by: kristinu
8 Replies
8. Programming
I am trying to practice to create Makefiles. The goal is to create a makefile such that if a change is made to any of the source code files, the project can be rebuilt by typing make at the command line.
I have the following files:
ac.cc: has include ac.h and pg.h
fr.cc: has main... (8 Replies)
Discussion started by: pintu1228
8 Replies
9. UNIX for Dummies Questions & Answers
Hey guys,
Suppose i run passwd via bash shell. It is a suid program, which temporarily runs as root(owner) and modifies the user entries.
However, when i write a C file and give 4755 permission and root ownership to the 'a.out' file , it doesn't run as root in bash shell. I verified this by... (2 Replies)
Discussion started by: syncmaster
2 Replies
10. UNIX for Beginners Questions & Answers
Hi All,
I was going through some makefiles where I saw occurrences of explib_subdirs and expinc_subdirs, which I could not understand.
Exporting libs to subdirs ? Exporting include files to specified subdirs ? When do we need to do that ?
What I could understand is, for a build, I would... (4 Replies)
Discussion started by: alltaken
4 Replies
LEARN ABOUT SUSE
pdl::gsl::diff
DIFF(3) User Contributed Perl Documentation DIFF(3)
NAME
PDL::GSL::DIFF - PDL interface to numerical differentiation routines in GSL
DESCRIPTION
This is an interface to the numerical differentiation package present in the GNU Scientific Library.
SYNOPSIS
use PDL;
use PDL::GSL::DIFF;
my $x0 = 3.3;
my @res = gsldiff(&myfunction,$x0);
# same as above:
@res = gsldiff(&myfunction,$x0,{Method => 'central'});
# use only values greater than $x0 to get the derivative
@res = gsldiff(&myfunction,$x0,{Method => 'forward'});
# use only values smaller than $x0 to get the derivative
@res = gsldiff(&myfunction,$x0,{Method => 'backward'});
sub myfunction{
my ($x) = @_;
return $x**2;
}
FUNCTIONS
gsldiff()
This functions serves as an interface to the three differentiation functions present in GSL: gsl_diff_central, gsl_diff_backward and
gsl_diff_forward. To compute the derivative, the central method uses values greater and smaller than the point at which the derivative is
to be evaluated, while backward and forward use only values smaller and greater respectively. gsldiff() returns both the derivative and an
absolute error estimate. The default method is 'central', others can be specified by passing an option.
Please check the GSL documentation for more information.
Usage:
($d,$abserr) = gsldiff($function_ref,$x,{Method => $method});
Example:
#derivative using default method ('central')
($d,$abserr) = gsldiff(&myf,3.3);
#same as above with method set explicitly
($d,$abserr) = gsldiff(&myf,3.3,{Method => 'central'});
#using backward & forward methods
($d,$abserr) = gsldiff(&myf,3.3,{Method => 'backward'});
($d,$abserr) = gsldiff(&myf,3.3,{Method => 'forward'});
sub myf{
my ($x) = @_;
return exp($x);
}
BUGS
Feedback is welcome. Log bugs in the PDL bug database (the database is always linked from http://pdl.perl.org).
SEE ALSO
PDL
The GSL documentation is online at
http://sources.redhat.com/gsl/ref/gsl-ref_toc.html
AUTHOR
This file copyright (C) 2003 Andres Jordan <andresj@physics.rutgers.edu> All rights reserved. There is no warranty. You are allowed to
redistribute this software documentation under certain conditions. For details, see the file COPYING in the PDL distribution. If this file
is separated from the PDL distribution, the copyright notice should be included in the file.
The GSL differentiation routines were written by David Morrison.
FUNCTIONS
diff_central
Signature: (double x(); double [o] res(); double [o] abserr(); SV* funcion)
info not available
diff_central does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input
piddles.
diff_backward
Signature: (double x(); double [o] res(); double [o] abserr(); SV* funcion)
info not available
diff_backward does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input
piddles.
diff_forward
Signature: (double x(); double [o] res(); double [o] abserr(); SV* funcion)
info not available
diff_forward does not process bad values. It will set the bad-value flag of all output piddles if the flag is set for any of the input
piddles.
perl v5.12.1 2010-07-05 DIFF(3)