01-27-2011
I'll check out libtool...but we've already fought to get some freeware tools installed and it was hard enough to win those battles...I'm not sure I want to fight another yet, lol.
As for Corona's Q: as far as developing goes, I've just felt that HP-UX has been the easiest to work with. Things just seem to compile and run well and as expected.
Jumping over to Linux I've been hit with times when an application just randomly seems to die and the core file is useless. We never had that in HP-UX, if it core'd we could use the core and figure out what happened. Plus, much of the code in Linux is the same as it was in HP-UX and the code ran more stable in HP-UX. Could it be our code...sure...but many of the times we have tracked down issues it was because Linux was just less tolerant or, worse, buggy itself and we had to code around its issues.
AIX is somewhere in between. It does seem pretty stable compared to Linux. However, sometimes intuition and AIX just don't go hand in hand. It is as if IBM went out of their way to do something just different enough to mess with you, lol -- like this weird linker crap, lol. While it is more stable...nothing else in it is better than Linux, IMO. They just run away with things like a Microsoft...trying to make it better than other people's stuff but getting in their own way when doing so.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hai
I have installed Linux 7.0 on my system and i have an doubt the
linker
i ran simple hello.c program with gcc compiler
gcc -c hello.c
i want linker to produce the output
so i put on the command line as
ld first.o -lc
but it is not running ver properly
but there is an... (1 Reply)
Discussion started by: rajashekaran
1 Replies
2. Solaris
I have recently set up a connection b/t a sun ultra 60 running solaris 8 and a regular old pc running XP. Unfortunately I only know a little bit about networking thanks to Winblows plug and play mentality. Can anyone tell me why my connection from PC to sun is intermittant? The IP is always... (2 Replies)
Discussion started by: Serious_Lee
2 Replies
3. HP-UX
Hi All
Could anyone help in giving a little background to the following runtime error.
/usr/lib/pa20_64/dld.sl: Mmap failed due to errno: 13.
Seen when executing a 64-bit ELF executable.
Thanks
Ed (3 Replies)
Discussion started by: C3000
3 Replies
4. Linux
Hi All,
I m new to this group.
I m facing one problem during my linking of CPP code at Linux env.
after compliation i m getting error
"undefined reference to ....."
Please anyone help me to resolve this error.
Regards,
ASR
make: Leaving directory /fwk'
echo g++ -o server ... (1 Reply)
Discussion started by: ASRRAJ
1 Replies
5. HP-UX
Hi,
The necessary symbols in a shared library can be exported to the application using linker option --version-script in Linux. The same can be done in Hp-ux using linker option +e. This can also be done by listing all the global symbols with +e in a file with linker option ld -c filename in... (0 Replies)
Discussion started by: roopa_v
0 Replies
6. Programming
Hi,
I do not use the default linker, and instead us another one and pass this argument -Wl,--dynamic-linker=<path to linker> to gcc when compiling. However, what happens if the linker is not under /lib and /lib64 and I am not able to create a symlink to the linker in /lib or /lib64 due to no... (2 Replies)
Discussion started by: Shompis
2 Replies
7. Programming
Hai,
I have two (Pgm1.c and Pgm2.c) simple programs, which is compiled using gcc. Now we have two exe's (Pgm1 and Pgm2). When i executed the nm Pgm1 and nm Pgm2, in the listed symbols the address of main is same for both programs (08048344 T main) at run time also.
Doubt:
1) What is this... (3 Replies)
Discussion started by: rajamohan
3 Replies
8. Solaris
Hey guys
I have a solaris 10 OS, with a zone configured. In that zone, I am trying to install an Oracle Client. However, when I run the oracle installer, I get the following error:
ld.so.1: java: fatal: libexpat.so.0: open failed: No such file or directory
ld.so.1: java: fatal:... (2 Replies)
Discussion started by: goodvikings
2 Replies
9. Solaris
Hello all,
I am releatively new to Solaris and I am the System administrator for my branch at the FAA. This is the first time I can say I have really messed something up thankfully. My issue came up after installing and uninstalling Oracle Secure Backup which i felt I needed to do a clean... (7 Replies)
Discussion started by: jbirkes
7 Replies
sort(3pm) Perl Programmers Reference Guide sort(3pm)
NAME
sort - perl pragma to control sort() behaviour
SYNOPSIS
use sort 'stable'; # guarantee stability
use sort '_quicksort'; # use a quicksort algorithm
use sort '_mergesort'; # use a mergesort algorithm
use sort 'defaults'; # revert to default behavior
no sort 'stable'; # stability not important
use sort '_qsort'; # alias for quicksort
my $current;
BEGIN {
$current = sort::current(); # identify prevailing algorithm
}
DESCRIPTION
With the "sort" pragma you can control the behaviour of the builtin "sort()" function.
In Perl versions 5.6 and earlier the quicksort algorithm was used to implement "sort()", but in Perl 5.8 a mergesort algorithm was also
made available, mainly to guarantee worst case O(N log N) behaviour: the worst case of quicksort is O(N**2). In Perl 5.8 and later,
quicksort defends against quadratic behaviour by shuffling large arrays before sorting.
A stable sort means that for records that compare equal, the original input ordering is preserved. Mergesort is stable, quicksort is not.
Stability will matter only if elements that compare equal can be distinguished in some other way. That means that simple numerical and
lexical sorts do not profit from stability, since equal elements are indistinguishable. However, with a comparison such as
{ substr($a, 0, 3) cmp substr($b, 0, 3) }
stability might matter because elements that compare equal on the first 3 characters may be distinguished based on subsequent characters.
In Perl 5.8 and later, quicksort can be stabilized, but doing so will add overhead, so it should only be done if it matters.
The best algorithm depends on many things. On average, mergesort does fewer comparisons than quicksort, so it may be better when
complicated comparison routines are used. Mergesort also takes advantage of pre-existing order, so it would be favored for using "sort()"
to merge several sorted arrays. On the other hand, quicksort is often faster for small arrays, and on arrays of a few distinct values,
repeated many times. You can force the choice of algorithm with this pragma, but this feels heavy-handed, so the subpragmas beginning with
a "_" may not persist beyond Perl 5.8. The default algorithm is mergesort, which will be stable even if you do not explicitly demand it.
But the stability of the default sort is a side-effect that could change in later versions. If stability is important, be sure to say so
with a
use sort 'stable';
The "no sort" pragma doesn't forbid what follows, it just leaves the choice open. Thus, after
no sort qw(_mergesort stable);
a mergesort, which happens to be stable, will be employed anyway. Note that
no sort "_quicksort";
no sort "_mergesort";
have exactly the same effect, leaving the choice of sort algorithm open.
CAVEATS
As of Perl 5.10, this pragma is lexically scoped and takes effect at compile time. In earlier versions its effect was global and took
effect at run-time; the documentation suggested using "eval()" to change the behaviour:
{ eval 'use sort qw(defaults _quicksort)'; # force quicksort
eval 'no sort "stable"'; # stability not wanted
print sort::current . "
";
@a = sort @b;
eval 'use sort "defaults"'; # clean up, for others
}
{ eval 'use sort qw(defaults stable)'; # force stability
print sort::current . "
";
@c = sort @d;
eval 'use sort "defaults"'; # clean up, for others
}
Such code no longer has the desired effect, for two reasons. Firstly, the use of "eval()" means that the sorting algorithm is not changed
until runtime, by which time it's too late to have any effect. Secondly, "sort::current" is also called at run-time, when in fact the
compile-time value of "sort::current" is the one that matters.
So now this code would be written:
{ use sort qw(defaults _quicksort); # force quicksort
no sort "stable"; # stability not wanted
my $current;
BEGIN { $current = print sort::current; }
print "$current
";
@a = sort @b;
# Pragmas go out of scope at the end of the block
}
{ use sort qw(defaults stable); # force stability
my $current;
BEGIN { $current = print sort::current; }
print "$current
";
@c = sort @d;
}
perl v5.12.1 2010-04-26 sort(3pm)